STFC-RAL-CR03: Thank you.
STFC-RAL-CR03: Thank you for the invitation.
STFC-RAL-CR03: Yes, okay good So yes, i'm going to check.
STFC-RAL-CR03: Okay yeah, so I will.
STFC-RAL-CR03: go through the.
STFC-RAL-CR03: Imagine the recently published measurement that goes on, with the cmt detector again with i'm going to go through a little bit of motivation or.
STFC-RAL-CR03: interest of the Web version as nervous to imagine it's white why it's interesting and I have to start.
STFC-RAL-CR03: With.
STFC-RAL-CR03: start with explaining I just start start by saying why what's most interesting about the w mastery is the fact that it has mass at all so as you familiar with asymmetric theory of matter.
STFC-RAL-CR03: Has it here a scale of field and.
STFC-RAL-CR03: And you can have a gauge information, as you can change the face adjusting the hdl appropriately.
STFC-RAL-CR03: And so, think of this mathematically as a transport from one point to another state so you're going from one point to another point to another point, and you can choose that sees that rotate with the field, if you like.
STFC-RAL-CR03: And that's a choice, again, you can choose your actions, how they are, but it turns out, you can have a.
STFC-RAL-CR03: visible field and.
measurable.
STFC-RAL-CR03: that's that works very nicely.
STFC-RAL-CR03: and seeking oscillate about this by one particle about the physical particle about that.
STFC-RAL-CR03: Access now and, as you do, and you have electric theory the week theory.
STFC-RAL-CR03: You now have.
STFC-RAL-CR03: The field has a non zero energy documented GMC oscillate about that point, and so, as you choose to choose a gauge to rotate around with the exact sees it cost you anything and so that you no longer you no longer have a fixed point zero or you can.
STFC-RAL-CR03: Wherever it is really change the axes without without losing energy so here, you have the energy energetic a little direction, and you can you can choose your coordinates but any any oscillations in this direction now basically HBO energy to NASA.
STFC-RAL-CR03: And so, this is what.
STFC-RAL-CR03: Let me say that.
STFC-RAL-CR03: Each So if you add a field to the gauge horizontal so they eat the scheduler components and so it's it's familiar from this wine bottle potential.
STFC-RAL-CR03: where you have this that this region here rare rare populations in this direction dog costume energy in the scale of field strength that they do.
STFC-RAL-CR03: So, so you have oscillations the longest axis give me his mask and if you go around this axis you get.
STFC-RAL-CR03: You.
STFC-RAL-CR03: get your issue.
STFC-RAL-CR03: It was on that, so this is all very nice at the tree level ranjan level, but then you also have one corrections to this picture and the most.
STFC-RAL-CR03: Important and D stern stern is a top of the higgs the audience and all of those who have not the same property, the Sikhs.
STFC-RAL-CR03: propagator they give you some some correction that just grows to to infinite infinitely large if you have a large scale so maybe.
STFC-RAL-CR03: goes up to the time scale and so now there's no new physics up to scale of this of this Lambda.
STFC-RAL-CR03: Then you need some fine tuning to cancel the similar granting with what's in these dresses.
STFC-RAL-CR03: And do you want something that is you get fine tuned if you want something to support a 1% fine tuning, you will need a scale of six and activity, so this is motivated to scale in physics, this is how it looks for the higgs field now for the electric electric week.
STFC-RAL-CR03: hv also this this mechanism gives you a potential that has mass times, as you can make down the potential of the last times, and you can plug in the.
STFC-RAL-CR03: vacuum expectation over the higgs field and collect the recovering and you get a three level some estimate from the masses on some numbers you measure in.
STFC-RAL-CR03: The case of new on the case.
STFC-RAL-CR03: And so it's quite it's quite a bit lower than you actually who was on mass because you have fun crashes, but important and again the top.
STFC-RAL-CR03: is mostly distraction, you get so you could get the w goes and ask you in the zebras on that and the electromagnetic covering.
STFC-RAL-CR03: covering the.
STFC-RAL-CR03: bk and you get an expression that depends on the top notch squared, and so this basis is van couple of traction and when you put it all of it on crashes you get prediction he won 354 person is he.
STFC-RAL-CR03: That he goes on that.
STFC-RAL-CR03: So, so this this is this joe's in some way in some sense that was a massive very intimately connected to.
STFC-RAL-CR03: Now naturalness and it's wonderful sense of circles to natural this source of that because of the loops that are going into the higgs.
STFC-RAL-CR03: w and see propagated and so a classic example is is to the cemetery where you have different signs for the super partners and we wouldn't have corresponding moves in a wi fi goes on.
STFC-RAL-CR03: Proper gators and any difference in the two.
STFC-RAL-CR03: Masses of the of the top and bottom stopping spotting review difference in the double masters.
STFC-RAL-CR03: masters massive weddings dubinsky different masters.
STFC-RAL-CR03: To put in the Z and you get it, you get a different w prediction out because of these additional products, and you can calculate this.
STFC-RAL-CR03: So one way to do this is to use this broke ground, and so the difference in route So these are Papa years right about his masses, so you take the difference of those and zero and you calculate it in the standard model for.
STFC-RAL-CR03: See Robin calculated other purpose don't in actually have a symmetric particles, you make down expressions, depending on the masses of those supersymmetric protocols.
STFC-RAL-CR03: And then you can calculate what your expected so it's anything you would change and who was on last week and you can do scans and supersymmetric protocols face and it's a particular scan for.
STFC-RAL-CR03: For NASA sparkle masses that are sort of consistent with and then is that ble see and so here's a startling last part so for at 430 you sort of get out you so running out of.
STFC-RAL-CR03: point to be on relativity and start now so exciting what some later start and that's the higher you go w that's yeah lauren that stop you would want to.
STFC-RAL-CR03: cause the Flash crashes so that's The case of susie more generally, you can have a vector field, the major parameters, whatever high school with Dexter.
STFC-RAL-CR03: And so you can write down the advantage for the standard model, you know down highway to terms reach out of time is suppressed by some power of the scale of the physics so dimension five you get things like my art of charm and.
STFC-RAL-CR03: nutrient masses.
STFC-RAL-CR03: to mask potentially the 1960s, when you start getting things that can affect the w propagator and so you get you get something that goes is to say that the.
STFC-RAL-CR03: Some correction So these are coefficients that depend on the actual theories that he kind of theory and then the changes the relative changing w mass.
STFC-RAL-CR03: Because this sort of order wine times these factors and then Times Square of the death over the specific scale so with this with this.
STFC-RAL-CR03: With this equation, you can then asked me what sort of new business scales, you would get with for one coupling so for company.
STFC-RAL-CR03: This term, which is the one that tells you the difference between the wc acids and you would add a new scale point out to the 4.1% correction on a daily mass and so things that will give this kind of term would be as evangelicals on.
STFC-RAL-CR03: This this time is a mixing to describe electric changes to electric mixing things I can positiveness can affect this and get what am I helping near your House a snappy.
STFC-RAL-CR03: scale physics and, as you go to if you if you reduce these couplings these types of problems, you would have to reduce the scale so supersymmetry has smaller couplings, and so the scale as far as when T rather than it should have the same effect wns.
STFC-RAL-CR03: Okay, so that's all the motivation behind measuring the mass so i'm going to turn to the measurements themselves so so starting with a bit of the background of all the measurements that have been performing since run one of the tevatron.
STFC-RAL-CR03: And left over that today, so these are the individual individual experiments measuring w mass and then these are the combinations for lead, and then the individual.
STFC-RAL-CR03: Did easier to Alice another new CD which is not on that, but that was in the paper, the LCD number, and this is the new science, you know.
STFC-RAL-CR03: Science, so I go through that new measurement.
STFC-RAL-CR03: CDs so just as a reminder and CD after data.
STFC-RAL-CR03: At the family that each other, trying to to TV proton entry proton collisions and a detective is the standard detective the inner silicon detector and a large open subject chambers job it's kind of a little bit.
STFC-RAL-CR03: I had some course tell them hey how's it going 24 hours and fly and it's an out of your chambers, which are not visible in that picture, and so the data set that we use, so the runway data set was taken in the 90s, and then the run to data so it's taking 2001 2011 and.
STFC-RAL-CR03: commissioning in the beginning, and then.
STFC-RAL-CR03: He started getting data for this version three we had a previous measurement that we've published.
STFC-RAL-CR03: 2012.
STFC-RAL-CR03: and use about a quarter that it says stores, is that half the running time, but the luminosity was lower so we had about a quarter the datasets we have about a factor for data by adding all these high luminosity brian's, as you can see the the meaning of.
STFC-RAL-CR03: interaction so.
STFC-RAL-CR03: Which is related to this case study and and you know previous versions peeking around one me a number of interactions in.
STFC-RAL-CR03: The current one, is a little bit about to around 2pm so it's it's it has a little longer tail so you get more interaction for passing but it's still quite a bit lower than.
STFC-RAL-CR03: la see.
STFC-RAL-CR03: Okay, so so that's the data set so, then I see a little bit about how we make the measurement and what's important for the management.
STFC-RAL-CR03: So make the measurement by looking for single isolated well single electrons in anyone's so that they tend to be isolated we don't we don't actually require that the selection.
STFC-RAL-CR03: And, and so we fit and so we can only measure imagine just is the electron and the the energy, the energy of the value goes on to all the head running energy.
STFC-RAL-CR03: And so we can make a transition mass quantity from those those measurements and, and this we don't have to see components.
STFC-RAL-CR03: Standards quantity, and so we have to use a template to to fit for the mass so so the change in the mass slight shift.
STFC-RAL-CR03: In its distribution, so this is 100 and maybe change in the mass, you can see how that distribution is changing it's a couple percent of the highest James Madison doesn't percent the lowest lows now so we're trying to get it we get something that's effective 10 or preciseness actually.
STFC-RAL-CR03: Changes in the mass but we're measuring.
STFC-RAL-CR03: And so, so that's the changes, and so we, the two pieces that go into this metric determines mass of it showed last time, which is the most which gives you the most information, the event and assessing the most precise calibration for the measurement So if you have a change in that.
STFC-RAL-CR03: transverse momentum of the child's life 27.1% it changes the spectrum of the child laptop spoken about by again, but I have 2.1% and we again achieve something that's 10.1% changes in that section.
STFC-RAL-CR03: And then, finally, the recoil scale So here we require that all of the other energy and your net the net energy, so that the the ricoh momentum which is the momentum, opposite the w which we require that to me to have about.
STFC-RAL-CR03: measure measure less than 15 TV and energy so so so so we don't have to be as precise that peaks around a few TV, so we have to be.
STFC-RAL-CR03: Less than a better than a percent precision is this shows what happens if a 5% chef and every productively again very hard to see.
STFC-RAL-CR03: In the neutrino PG spectrum and, but if you take the ratio is again about 1% and again we get about effective tempo So to that extent that we're that we're determining this shape of the spectrum.
STFC-RAL-CR03: OK, so those are the calibration, we need to perform that the chose last time and the end of the week or other other key key calibrations in order to do in order to get this kind of precision.
STFC-RAL-CR03: We have to have a very flexible analysis and simulation so we have a custom simulation for this analysis.
STFC-RAL-CR03: Where we we bring all of the physics for.
STFC-RAL-CR03: For all the particle injections the ionization energy last multiple scattering branch going full time virtual conference guys all putting equations are put into the simulation and then, then the detector is modeled.
STFC-RAL-CR03: system by system so starting from the outside, we have accepted smack in the architect, is that we take.
STFC-RAL-CR03: From the simulation from the book simulation and we also have we develop your own data for model of the electromagnetic.
STFC-RAL-CR03: color showers of the cf simulation have had a different parameters model called G flash which was that which was, which was mostly just.
STFC-RAL-CR03: sort of course it is that is a favorable to to this moment, so we developed her own franchise model and so include things like the shower last to the finite thickness.
STFC-RAL-CR03: And thickness about 50 ready to make that 15 or 16 regions at cf which it does leave Center so a couple percent even a shower, that is, naturally, is crucial model because point one or better accuracy.
STFC-RAL-CR03: The other thing we have is we have very large.
STFC-RAL-CR03: Drift Chamber, and this is what this is the key to the measurement is is is is using the Church, the church bank.
STFC-RAL-CR03: Momentum measuring from the strip Chamber, and so we have to model, all of the layer by layer resolutions efficiencies as a functions for these for these things are we measuring data.
STFC-RAL-CR03: And then we, and then we have to we don't use the silicon detector on the inside, is a very taxing detective what we really want.
STFC-RAL-CR03: The very precise determination, the momentum so we do is we be constrained the track to come from the mind exactly there's a very precise point at the production and then we don't use we.
STFC-RAL-CR03: Use the silicon we'd have to worry about all the lines misalignments, which is very tricky.
STFC-RAL-CR03: Facility and it's not as a uniform so.
STFC-RAL-CR03: As a strip Chamber, and so what we have to worry about the energy loss inside that so so when you measure the track out here to complete the entity that's lost in the so, and so we have to, we have a map, so this is the example map that radius where there's lots of.
STFC-RAL-CR03: Lots of cables and you get about 10% radiation, my goodness we do have this cables about halfway through this so.
STFC-RAL-CR03: So that's that's a simulation so using that simulation We then go and.
STFC-RAL-CR03: model, the data calibrate the data and so when we do the calibration we want to start with data that is a uniform as possible throughout the detector and time.
STFC-RAL-CR03: So, so we had a.
STFC-RAL-CR03: We had for the for the tracker we have alignment procedure that's based on cosmic Ray data such as because of great data that this is an example cosmic Ray where we just look for a single factor to tracking event that's taking the same data sets all in such you and then.
STFC-RAL-CR03: We do a single Felix to the to the whole track so there's nine up to 96 hits in each of these are there, so you have a potential hundred 92 it's.
STFC-RAL-CR03: In a single track, and we can use that we can then look for why positions relative to the track fit.
STFC-RAL-CR03: and use that to make corrections to the to the positions of all of the cells chain right so usually sells.
STFC-RAL-CR03: The teens called wires and it's a database layer, so we do this, all the way around so there's 20 520 of these cells, all the way around in these eight.
STFC-RAL-CR03: super layers, and so we allow for a tilt shift of each of these and so me we fit the customer here to get with statistically precise to to have MIC runners So you can see the corrections order 5100 and sometimes when when my time comes for free for the position of each so.
STFC-RAL-CR03: The other piece, that the line so that tells you read it, where, on average, this is the wires are.
STFC-RAL-CR03: From where the employees were.
STFC-RAL-CR03: fixed the mta toiling away is that between the two employees the wires say.
STFC-RAL-CR03: You, the gravity and they also have a space or in between, which also gives us some somewhat of a non parabolic shape here, and so they have a.
STFC-RAL-CR03: model that shake and we, we also have that then the other fact event comes in, is that the site will will change the.
STFC-RAL-CR03: relative position of the wires depending where you i'm fine and I will change some electrostatic deflection of them between between the two wires, and so we had a correction to to correct for.
STFC-RAL-CR03: electrostatic attraction depending on where you are in fi and depending on where you're.
STFC-RAL-CR03: Located access there's some serious going on, when it when it's not and we have to derive these from from the data can cause of great So what we do is we look at the difference in the patronage between the two cosmic rays as functions of, for example, fi or here is called data.
STFC-RAL-CR03: So here we have the change the difference in the curvature try to repeat it.
STFC-RAL-CR03: Between the two tracks and before the corrections as a courage and bias and there's a bit of a shake and after the corrections splashes if yours that windy see the courage to buy it and afterwards the bias.
STFC-RAL-CR03: that's the alignment that's the first step in the calibrations the ones that tracker is aligned, we can now calibrate the momentum scale.
STFC-RAL-CR03: Using json so we started deciding case to nuance and so in the simulation we want to match so it's regenerated the events and we have five boost to match me PT of the side and and.
STFC-RAL-CR03: The relative momentum of the of the of the tracks, because these are things that affect the resolution.
STFC-RAL-CR03: That we measure and will affect the line shapes we want to make sure that the kinematics are as well model as possible, to be able to model.
STFC-RAL-CR03: lines shapes of the mass, and so we remodel the shape is This is all due to the intrinsic with the thing is so small it's all resolution and.
STFC-RAL-CR03: 3D radiation, so we have at the state level simulation we model, the form factor and about format for the 3D radiation which affects the shape of a slow side it's hard to see, but if you if you don't use this factory that you get really bad.
STFC-RAL-CR03: So we have we put that in and we get these are much better than being able to achieve in the past with pretty we always had a load 3D systematic and because we're not good, but now we have.
STFC-RAL-CR03: we've been able to model.
STFC-RAL-CR03: This analysis.
STFC-RAL-CR03: Okay, so it's we've modeled atlantic's with the size and so we we've done these.
STFC-RAL-CR03: Practices modeling that fanatics, we also have to correct, we have a few other questions for the tracker that are not constrained by the cosmic great data.
STFC-RAL-CR03: So the length scale the tracker is not constrained by the radius so this can be constrained by the mass measurement so So if you have a different lane scale it changes the opening angle between the tracks and if you if you.
STFC-RAL-CR03: If you have something that says smart opening angle, you have a smaller mass So you can see as a function of mass that you can punch of open in the mass.
STFC-RAL-CR03: The mass of opening was a difference with the specs of know neither mass and so you can flatten it so you can change the scope, it turns out, it about this order percent the scale that we have to.
STFC-RAL-CR03: comply correction, you have to apply the other thing we have to apply a question for is the amount of upstream material and so.
STFC-RAL-CR03: This will change this or change the distribution the mean inverse PT to get more.
STFC-RAL-CR03: Relative and the last that ott unless relative me just hadn't gc you enter the slope if you're just modeling this, and so we apply a couple of traction here as well, to make a splash.
STFC-RAL-CR03: And so, these are the J size and does awesome excellent point and see the lines are good for adding information here but we've been most important for this is the third step of the calibration, the most important for testing the constraints that I mentioned to that mean like staying.
STFC-RAL-CR03: The track to the beam position and and this gives you a much narrower shape, so this is good.
STFC-RAL-CR03: This is about things, you can see, you know their distribution, so you want to do this for the w has management with a Z measurements and so you can test this.
STFC-RAL-CR03: Precisely with precision statistical precision, you can test it changes not having to buy it and, in the past, we had seen some bias and that's now understood and corrected for and to navigate assistant.
STFC-RAL-CR03: Momentum pits between.
STFC-RAL-CR03: When you have the constraint or not so so so now having done all of the steps with the J sizing as long as we've been wanting to test our calibration with the Z bows on mass measurements and this this is done.
STFC-RAL-CR03: With some blinding upset.
STFC-RAL-CR03: It.
STFC-RAL-CR03: happens every everyone.
STFC-RAL-CR03: So that's the.
STFC-RAL-CR03: way people.
STFC-RAL-CR03: are talking.
STFC-RAL-CR03: So right so now we've done all the calibration with alone right and the last.
STFC-RAL-CR03: Reason resonances we want to manage the zebras a message something near to the w.
STFC-RAL-CR03: And so we bind it this cloud the previous steps to see and we then invited in that this number, which is very system with the left by 9128.
STFC-RAL-CR03: And so we we include this this as some additional constraint into the momentum scale that we want is that the w's so if we put all them together to get momentum scale, that is, that is then used to measure the w goes on that.
STFC-RAL-CR03: So that's the charge.
STFC-RAL-CR03: tracks, the new one woman to scale calibration, so now we want to calibrate the electrons so we have this very precise fact calibration.
STFC-RAL-CR03: So we want to transfer that to the customer, so we can do this with electrons because the ratio of the common interests of the tracks, that the church track momentum.
STFC-RAL-CR03: should suffer for it should be the same, but their details that you have to worry about, and so we want to make the ratio of this distribution.
STFC-RAL-CR03: Which whichever one you really have to worry about is how much Ram strong production is going on in the silicon if we get to the Chamber, because that will reduce the.
STFC-RAL-CR03: chose cat momentum, but but that energy will still end up in the elevator so yeah more energy than then track mentors you did this tale of energy to imagine ratio and we use this again we have a small fraction of a percent to the amount of material affecting the radiation Nice.
STFC-RAL-CR03: For this radiation brainstorming production tomorrow, this marvelous tell me about w w w cities for this The other thing you have to.
STFC-RAL-CR03: worry about is whether we're getting the what the other thing is really getting that then that the nonlinear so so whether there's any electronics ngc other panelists on energy, and so we can use w's and these.
STFC-RAL-CR03: sort of in the measurement region, to see if there's any dependents imagine we do teach them the tea and Sam we have a small game, you have a small correction.
STFC-RAL-CR03: To remove any any any non hearing The other thing you have to worry about is how much.
STFC-RAL-CR03: shallower because there isn't that comes from the very low end of the distribution.
STFC-RAL-CR03: So the low end of the distribution so you'd have to you have to my speak ditch if you go out the back of a kilometer won't have enough energy so you're going to get in and get it this modeling and this tells you can see.
STFC-RAL-CR03: Again, I wanted to present corrections.
STFC-RAL-CR03: thickness of the calendar that we use that then models this movie.
STFC-RAL-CR03: The other thing we have to do we want to do is get uniformity in our directions so so weeks, we have a.
STFC-RAL-CR03: We have a data aggression, where we use the European bunch of time and it's but position inside the Tower to remove any dependence on time and.
STFC-RAL-CR03: And response within the tower and then we have the Tower to tower records from from you repeat this that's What this shows the Tower tower oppression.
STFC-RAL-CR03: and see ncc removed.
STFC-RAL-CR03: Any kindness in that in that.
STFC-RAL-CR03: So so once we've done all of these corrections and modeling are the line shape of you repeat and insert the scale for the calendar energy.
STFC-RAL-CR03: We do the same thing as the nuance and we measure that he goes on mass and again consistent with lack of precision and not as good, because we have to the calendar.
STFC-RAL-CR03: has crashed, so we have to remove and sweet we don't have as much producer volume, as with the nuance but, but again it's consistent with the measurement of lap.
STFC-RAL-CR03: decision that we have, we also want to check that dirt track to calorie procedure matching is it working at if we just were looking at the tracks electrons reminding the tracks electron well not just.
STFC-RAL-CR03: And because that's that's what this procedure is based on in the tracks depend a lot on again of the radiation of brainstorming and so on, so we want to check that we're also getting.
STFC-RAL-CR03: On the track information, this is an example where you have nine media to track, so you repeat less than 1.1 and mess with this traffic distribution looks like.
STFC-RAL-CR03: track mass, and this is what the calendar message to the calorie masses narrower is worse position that's why we use it, but we check that all of the different tracks read an unrelated electron of consistent with with left.
STFC-RAL-CR03: Okay, so that's the that's the calibrations of the charges at times, so the last calibration we is of the recoil, which is the.
STFC-RAL-CR03: Balancing energy of the Web design, and so this is this is tricky because it's all just spread out in the event is hard drives that.
STFC-RAL-CR03: We don't have as good response for and so we're going to go through a few similar steps so we want it first have uniform.
STFC-RAL-CR03: Data measurement of the data so relying here, we have to learn and how it is that there's an offset with respect to the mine and it will change your give you a bias in the repo direction so there'll be more energy along a particular direction and you'll get.
STFC-RAL-CR03: And you're also a oscillation as a function of five of the retro position, and so, so we can look using a nice data to look for it to adjust and removing observations and just be positioned to the calendar and you do this.
STFC-RAL-CR03: For each month periods over time rough period ends at take your protocol monitor it back and put it back into place to to adjust the alignments every time.
STFC-RAL-CR03: So this is something we do specific for this analysis and then some having once you have the uniform data that we need to define a procedure to reconstruct to require the event, and so you take all the top of it comes to energy, you know the towers, if you remove the towers were.
STFC-RAL-CR03: charged laptops have gone through, because they leave energy and it's not equal any this time energies, we have to not count that as part of the recoil.
STFC-RAL-CR03: That we still have to somehow model what we what energy went in those towers from the week or so, so we do is we.
STFC-RAL-CR03: make a distribution of energy from all the events from all the towers were created by 90 degrees and so that we put this model into the simulation and then we check that it and we want with them, we have to assume that it's modeling.
STFC-RAL-CR03: The energy underlying the event at zero degrees and the line that that time.
STFC-RAL-CR03: Supposedly, so its own except as we look, opposite the lap time so rotation in the other direction and see that we're modeling energy in that other direction, and this is what it looks like as a function of the new parallel that the the recoil the total recall along the direction of.
STFC-RAL-CR03: The tower looking at so so so so yeah So you can see that repo energy is allowing the Tower looking at if you're going to have more energy tower in a tower so roommates we had to include this dependence, otherwise.
STFC-RAL-CR03: They sort of G level energy that's going to power, so we have to model and so.
STFC-RAL-CR03: Okay, so that's the reconstruction, the recoil then we once we have the record extraction defined, we have to calibrate the response of the detectives to the required so we use the dms so we have.
STFC-RAL-CR03: to charge that time and we just look for the.
STFC-RAL-CR03: Count count count calculate the.
STFC-RAL-CR03: cpt and then learn and take the difference between a recoil energy, on the other side to the zte so the DVD is around eight access and so that the difference.
STFC-RAL-CR03: is shown here so it's a bunch of your high resolution function of response function is roughly zero but there's some difference from zero to two charged left hander solutions so so you get a little bit of a bias that high each other.
STFC-RAL-CR03: But this is our model.
STFC-RAL-CR03: In the simulation and system of the data, so this is what the response function looks like so so now, if you project, the recoil along that.
STFC-RAL-CR03: Access you take the ratio to the zoo goes on PT, this is what you get this response actions you're getting something like 50% responsive by God and close to 70% response to add.
STFC-RAL-CR03: us to respond response in the last piece is the resolution resolution is the most complicated part of this before model, you have to have a you have a jet like energy respond so rude.
STFC-RAL-CR03: rude energy pennants which is, which is included in this this distribution is just a response along resolution along the access that ptsd is where the JET would be uncertain growth.
STFC-RAL-CR03: factor, then you then you have some underlying event with attendee any additional attractions, which determines how much business, you have contingencies contingency is zero and then, and then you also have to account for the angular resolution of the recoil.
STFC-RAL-CR03: REACH depends again on how much with the momentum, and so we have different things of momentum and we end, this is what the resolution with Rebecca, this is the.
STFC-RAL-CR03: angle between the recoil and the opposite direction of the Z goes on momentum so, so this is giving you a resolution recoil and the.
STFC-RAL-CR03: Pilot is model with some he of the event, this is what the summit, it looks like in relation and we then Dr resolution function take it from invited data to throw a resolution and that's What helps us model, this region.
STFC-RAL-CR03: And so we use these distributions also this is along the axis.
STFC-RAL-CR03: Of the cpt also perpendicular perpendicular one is good because it that it really helps It really is more sensitive to.
STFC-RAL-CR03: The underlying event and and the pilot so you can you can tune those parameters very, very well as those distributions.
STFC-RAL-CR03: So that gives us the full once we have the phobic or model in a simulation based on all the tunes as he goes on data, we can then validate with.
STFC-RAL-CR03: Who is on the pro distributions, and so what the most important distribution is is the is the projection of the recoil alarm and charge about time.
STFC-RAL-CR03: momentum, because if you write down the transfers master first order it's two types of charts up momentum plus this parallel So if you have a bias in parallel, the first order that's advice.
STFC-RAL-CR03: And so, so we look at we looked mainly for differences in this new and you're all consistent between simulation data everything.
STFC-RAL-CR03: signal the combined uncertainty these uncertainties.
STFC-RAL-CR03: come from the uncertainties that arise from all to needs in the disease and we don't show we didn't calculate the.
STFC-RAL-CR03: Corresponding effect on the cost rate, so the cost ratio is quite large but it's not including this the variations that you get in all the parameters it's only for the best fit for them is not the variations, you can get from A to Z data.
STFC-RAL-CR03: So we we show that we should.
STFC-RAL-CR03: Okay, so that's the that's the recoil.
STFC-RAL-CR03: validation so so all of this now, we have our calibrations of the charge life times we validated them with the disease can help in the recall validated with the w.
STFC-RAL-CR03: recall along that direction, now, now we have to put the pieces together to select events and to make the measurement.
STFC-RAL-CR03: So, so we select our web design candidates with triggers with very low momentum fashion so etv single that time triggers with various that time I need some particular there's no isolation requirement in the trigger and the offline ID is also very.
STFC-RAL-CR03: efficiencies vary by a couple percent as you go out to hire recoil align the directions, this is where you worry the most of the new parallel.
STFC-RAL-CR03: If you don't evolve as efficiency, then you can get at you kind of ice what you don't want, so we have an efficiency.
STFC-RAL-CR03: curve that we put into the simulation project for this measured using zenith, and so we can have some loose laptop idea because of this very tight recall requirements of this week was less than 15 GB so we have 30 gv missing at 930 recoil so that really reduces the backgrounds by lot.
STFC-RAL-CR03: Then we have, so we have these kinematic regions where we want to do the Masters would require that all the events have a lot of times to have energy to the city region and his team as well, and then the genders.
STFC-RAL-CR03: And with all of this we get 2.4 w candidates to nuance and will.
STFC-RAL-CR03: be the case to case.
STFC-RAL-CR03: Okay, so so that's our selection, so now we have to worry about with the backgrounds are in the data sample, and so we model of electronic backgrounds disease.
STFC-RAL-CR03: w to town with it with the fast simulation which has been tuning using data using English is cross checks with a full simulation and we, and we can get many more imagining it much smoother distributions but this festive simulation and we get all consistent.
STFC-RAL-CR03: With the chapter, we were able to get consistent better predictions to.
STFC-RAL-CR03: Give.
STFC-RAL-CR03: The more diverse background and all of this is the new events we have one I only construct a new ones, because our new on chambers only extend to either one, and it goes more for it than that and we have.
STFC-RAL-CR03: One here the other guy in central looks like a w candidates, and so this this ends up being 7.4% of the of the data and you can see, most of this distribution here is either new events.
STFC-RAL-CR03: The Wu Tang you is small it's about a percentage each of the thousand in a who live his contributions to the towels.
STFC-RAL-CR03: towels came to electronics and chinos as much so much lower momentum.
STFC-RAL-CR03: You also have some background from mystery constructed had runs.
STFC-RAL-CR03: As lap times, and this is estimated using cadences the order 2.2 2.3% depending on your channel.
STFC-RAL-CR03: So the quite small.
STFC-RAL-CR03: Okay, so that's the that's the selection of backgrounds and then the other thing needs to model can he is a model of the production indicate of adobe goes on, so, so this is where we have been generated coming comes in.
STFC-RAL-CR03: The PG distribution of the w a real, effective the PG districts have a laptop, and so this then would affect the masses, we want to model this as well we use rest post generator which is.
STFC-RAL-CR03: which has an opportunity to capture to to allow us to just where the simulation simulation is this distribution, this is the zte and has some recent nation to to CAP to model, this is preservative tail so, which is the tails going after 30 days is mainly due to the summation of thought.
STFC-RAL-CR03: And so, so so breathless we model this we can adjust, we have two parameters you just want me to get this peak in one parameter to get the level of this of his tail.
STFC-RAL-CR03: Which is a, which is a production company alpha ask for that and so models so after factory tune with disease, we can uncheck that and models of dummies of models that, though, is very well, we actually then use the web, to further constrain any any theory uncertainties on the ratios.
STFC-RAL-CR03: Distribution so in the end of the really concerning things with the w's.
STFC-RAL-CR03: matches the w distribution and.
STFC-RAL-CR03: The other thing we want we've waited up with the production is the part time distributions so this matters because of the.
STFC-RAL-CR03: chapters central at less than one, and this restriction and hater reduces the fashion, events that we we collect that lower energy away from the.
STFC-RAL-CR03: 14 GDP of where we're going just straight up and down they're going at some angle don't have lower PT.
STFC-RAL-CR03: And it changes the shape of the distribution, if you have your data too much look at that time to move your mouse down to account for that, so you get advice so you have to know these parts and distribution as well.
STFC-RAL-CR03: And so we we been running with this rest of austerity, of the naughty ssh access and for many years, five years and, as this can be outdated we played an update by a.
STFC-RAL-CR03: simulation simulation was a view only crashes updates or more modern.
STFC-RAL-CR03: yeah and and we chose this one, because it had the most.
STFC-RAL-CR03: tablet time charges and management and productivity measurements are very good at constraining pdfs relative to w goes on production.
STFC-RAL-CR03: So so yeah you get them, this is what.
STFC-RAL-CR03: percentage of them were more charged more momentum on average down so you get.
STFC-RAL-CR03: classes will get more forward in the address and we'll get more forward in the antioch direction so to get this choice.
STFC-RAL-CR03: So yummy we determine the uncertainty, by using a principal component analysis on 1000 replicas that they.
STFC-RAL-CR03: Provide so we found that this measurement sensitive about 15 it matters.
STFC-RAL-CR03: So, as we look at the decreasing and points of the of the uncertainties and after about 15 years falling.
STFC-RAL-CR03: away like noise will be extended out to 25 it matters testimony the uncertainty this game 3.9 any certainty, we also checked.
STFC-RAL-CR03: With the other means, so he he he.
STFC-RAL-CR03: gave himself, he took central value than the range was 2.1 and it is always within.
STFC-RAL-CR03: This uncertainty The other thing we have tomorrow is the final state radiation.
STFC-RAL-CR03: This will change by a couple of hundred led the charge up momentum so it's important to have a recent nation that gets this few hundred led fact the high accuracy and this is this for this we use photos which was, but it was developed in the last days.
STFC-RAL-CR03: We can check that this is working, by looking at the energy and the towers around the job lap time and then also with the boys on that's also another validation that modeling this time series.
STFC-RAL-CR03: So those are all the pieces of me and just have to do the beds, to the distributions that we measure So these are the but it looks like that free form that fits for each of the transmission Nice in the.
STFC-RAL-CR03: New on channel and electron channel and analytics, and this is what the difference with respect to the simulation invasion was like each of these then.
STFC-RAL-CR03: We also do the fit to the child momentum and again, this is the electrons neutrons electrons, and these are the difference between the two of the simulation and the data, and we also include in the fit that touched the neutrinos distribution, so the.
STFC-RAL-CR03: I guess that's something that's happened with that distribution, but I will go on to the the measurement all of the decisions combined and so.
STFC-RAL-CR03: This is what so each individual festival, it was a nuance combined in the empty when the PT Latin PT and then combining various combinations of.
STFC-RAL-CR03: Of fits and just taking the electrons are just taking the nuances of all the numbers that you get they're all very close to each other so within the uncertainties and some correlations, of course, but, for example, like tons of new ones.
STFC-RAL-CR03: Are within within each independent data sets within.
STFC-RAL-CR03: Less than one signal each other quite close.
STFC-RAL-CR03: The other thing we look at is the.
STFC-RAL-CR03: difference between the positive and negative charge that time that you get the difference.
STFC-RAL-CR03: And and and here is the type of time these any difference any any difference that you have in the measurement should cancel out first or every check that it's.
STFC-RAL-CR03: That we're not we don't have any advice any device and we get we get numbers over assistant between those two.
STFC-RAL-CR03: We also do the electrons you do these spirits and then we also recalibrate you repeat again, this is what you get with work recalibrating you repeat this which you get after recalibrating your PC have to make small adjustments if you're going to.
STFC-RAL-CR03: It was response to between the pluses and minuses but but on and switch to an average cancel.
STFC-RAL-CR03: But you can see what the laws are before and after, and so the last one is done since different reasons, and the last one is different time periods of cms mentioned different time periods, the first half of the data second half of the data.
STFC-RAL-CR03: He has a small.
STFC-RAL-CR03: run the patents that again should average out, but once you do the European it does.
STFC-RAL-CR03: So so that's that's it so In summary, that w boss i'm not masses is important parameter in general, in particular, or understand naturalist.
STFC-RAL-CR03: And this management has been achieved with 10 better than the precision with a complete data set, it is the result of more than 20 years of experience, but this detector.
STFC-RAL-CR03: achieve the precision is point 1% and to Jesus presented it took a lot of flexibility, we had the team announced schematic control all aspects.
STFC-RAL-CR03: Construction alignment and collaboration simulation analysis, all of this stuff is done specifically had his own versions of this analysis and all these procedures that I showed were approved.
STFC-RAL-CR03: blinding blinding assets that we didn't know until until the season proved to be within pro with them and enlightening to see the numbers.
STFC-RAL-CR03: And as a Shelby to get this point 1% deviation from standard model resist resist surprising and interesting enough motivation and the first day extended study of the other measurements procedures.
STFC-RAL-CR03: Differences between experiments, but potentially give us some insight.
STFC-RAL-CR03: into nationalism is worse.
that's all.