Can you see my slides?
Yes. Okay.
Okay. Good afternoon everybody on this presentation, I will talk about the ex
differential measurements for adolescent CMS. So, all the measurements that we
present later are fiducial sections. So, let me introduce this concept here. So,
traditional cross section, our cross section defining a fiducial face space,
which is a kind of reduced phase space based on areola analysis and the detector
acceptance. So, we apply some cut cuts through to level in order to minimize the
extrapolation effect in our analysis and this you can visualize this here in this
sketch on the right following this assumption, the visual cross section of
the most modern independent way to measure Hicks interaction Elysee, but of course,
they come with some limitation for example, if you want to combine two more
channels, you need to include extrapolation to a common Face Face, and
that also some assumption of the potential issue. The kind of quantities that we
unfolded, let's see are related to the Higgs boson kinematics in production the
key variable is the jet produced in association with the Higgs and mixture of
ex kinematics and jets. So, when this level to present the analysis flow, just
more or less control the measurements that are present later. So the first step is
you identify reconstruct a quantity that normally is linked with one to one with
the variable that you want to follow them. So you have to define your meaning, which
is normally based on an expected number of events or directory solution. Then you
have a step called unfolding where we collect our data for our detector effect
like resolution and efficiency And then we have an observable that we use in order to
extract a number of sigonella background events. After that, we have our own for
the cross section on top of this and for the results, we do our interpretations. So
let me start with the first channel. So next for lepton funnel state is the only
channel that we have today for both experiments 114 versus one to one. And
that was just released recently a paper with the legacy paper referred to as we
presented before, this channel as a very well known properties. For example, a
political structure will find a state very high so it'll be around the Higgs peak. It
does an excellent Nvidia muscle resolution. As you can see, in these two
blocks, we have a very nice narrow peak on top of a flat background. And the dominant
background for this channel is the Z production mainly through Q and it's
estimated using the multi Garibaldi in case of CMS In a mixture of data
assignment and MonteCarlo for Atlas the first measurement that I want to present
here is the expected differential cross section, which is one of the most
important variables that we can investigate. Let's see, because it's a
really nice variable in order to probe the global English, we'll know fusion loop in
production, and we can distinguish to let's say, pata region, the very high PT
region, which is very such can be sensitive to any additional particles can
join the rule official loop, but of course, this particular region is not very
interesting index for leptons due to the statistics. And then we have the low
Piketty journal, it's a below 30 gV Where are these this particular face pace is
sensitive to the Yuka gobbling to the Quark BNC and the extra leptin says Very
stronger power to to this particular face base. Here you can see the results on the
left for Atlas on the right for gem So, you can see the black dots that are our
measurements compared to the Standard Model prediction and you can see the
overall there is a very nice agreement with the multilateral expectation sorry
with the funder model prediction of loss in the citizen paper also provides an
interpretation of the treaty spectrum as a function of Kappa bigger policy. And if
you go to consider the most modern inventor shanaar you just considering the
shape it is distortion as a function of these two parameters, we can put an upper
limit at the level of plus or minus to Alpha Kappa see. other variables that we
can measure index over laptops are for example, and three four, which is the most
of the sub leading pair. It's a very important variable of issue consider that
too many people So contribution can distort, distort this
distribution. For example, we know that some HDL graders can affect this
particular variable. But at the same time, we are also starting to be sensitive to
some effects predicted by the Standard Model, for example, final state
interference in the
44 new.
Here on the left, you can see the results for mt four and you can see that it's a
very nice agreement with the center model on there, I thought there is another very
important variable which is number of jets for CMS. This variable is very important
because it's very sensitive to the production well composition is used a lot
in our multivariate analysis to distinguish the production model and
senior versus background that is also sensitive to the actual image. With
increased luminosity, we are also able to push even more than double the federal
psychosexual From here we can see an example of two of them on the left we have
a number of jets and the right to diversity stability in all of them sorry I
didn't mention before but for all these measurements next for laptops is still
statistically dominated so they get an order this mainly limited by the
statistics on the with the ram three and later with a luminosity we'll be able to
push even more granularity to this measurement something that he doesn't
fully limit which is our detector resolution.
No gamma which is
seven shot channel I want to present today for this channel we have results for
another set 114% have been for CMS 36. What so this channel is fleeting
extractable from a state but lower a server be compared to different laptop
from a state. It is also very excellent. What a monster resolution on the level of
one 2% and the next beige background is they want to know gamma gamma production
which is estimated from the data side and the other kind of analytic fit. Here I
want to present the results for x gamma gamma on the left you have the expected
distribution of 140 investment to bond for others. On the right you have the number
of digits for CMS a 36 inverse font, but now you can see there is a good agreement
between for both measurements in both experiments. We don't see any significant
deviation with respect to the standard model but important to say they also even
if we wonder 14 restaurant of biotics for gamma gamma is also dominated by
statistical uncertainty so to increase the luminosity, we'll put salaat to this
channel in order to improve the measurements. Others provide also the
interpretation of cap of the PT distribution as a functional capacity. V
and the V e take into account to the most model independent shannara we're just
considering the distortion a function is too complex we can put an upper limit at
the level plus or minus 20 units in capacity and 95% confidence level. Others
did also nifty interpretation of future cross sectional material try to
constraints with so coefficient of operator dimensional six using five
observables at number of jets and the properties already mentioned before why
they're important mgg which is important to announce to the VBA for GMO data for j
which is a CP sensitive variable and leading GPT which is which provides
complimentary information to PT a number of jets. Here on the right you have the
eight couplings that have been investigated in summary brought to justice
See that when you have on the x axis equal to zero is the standard model. As you can
see all the upper limit that we can put on these parameters are well consistent with
the Standard Model assumption. This plot is made basically fitting one coefficient
at a time as setting the other efficient to zero. And then we will have more
details on the talk on Friday by Nikita. The last channel that I want to mention is
next to ww for this channel, we have just a measurement from CMS 114. That's
rentable. The property of this channel sought a lot of adventure issue compared
to gamma gamma z, but the fun of cities not fully constructible due to the
presence of neutrinos. And the main background for these channels are WWDC,
but production where the ships are evaluated the MonteCarlo and the overall
normalization of the Babylon the statements from data one through eight
Let's see, I must provide two measurements one was using the x two w w, the PT of the
Higgs on the left and the number of the Jets from the right as you can see, in
both cases, we have a very good agreement with the Standard Model expectation, just
to mention a small difference with respect to gamma, gamma and z in this particular
channel, we there is a two dimensional fit in each bin of the distribution, whether
it is transfer mass versus muscle developed system in order to announce the
separation between a signal background. And then as you can see, the granularity
of the PT distribution is not so fine like gamma gamma z given the lower resolution
in PT, and also the higher background but it's very important to notice that this
channel at the very high PT so let's say about 200, gv, and the very high jet
multiplicity above three gv sorry about above three jets, it's very competitive
with a gamma gamma. So, this channel will have very important weight
and the final combination
now let's move to the bank differential section. So, as I said before in order to
combine the two or more channels we need to accept it Come on face to face it
normally is considered the full face pace. This means that we need to add some other
less some assumption and also we increase our 2d uncertainties with respect to the
future cross section measurements will be we need also to take into account for the
uncertainties and adventure issue itself. Here on the left we have the distribution
as a function sorry, the PTT combination of four outlets when we combine gamma
gamma zz using a C with one on the fourth inverse Phantom or there is a variable
consecutive months with a standard model that we value especially high at the level
of 80% of the central plot, we have the CMS distribution of 36%. But when the
combination is done using a gamma, gamma z and x to be the bar, you can see some
contribution to the bar in the very high density region. And then here on the right
the interpretation of the distribution using the ship distortion adventure ratio
effects. And you can see all these measurements are very compatible with the
Standard Model prediction. Just to conclude the So, we have already several
differential resection of the Higgs boson performed by other CMS, all of them are
still statistically dominated. We observe a very good agreement between the Standard
Model prediction and experimental results is confirmed also with our interpretation
on top According to the results, and still many new results with the full on two data
set to come, so please stay tuned them. Thanks a lot.
Thank you for this quite comprehensive set of results. So let's take questions from
the audience.
So I don't I don't see any questions, so maybe I can take the chance to ask one.
When you talk about the fact that the data statistics limit the been with us in these
quantities, do you have a feeling at which time labor's it's not needed anymore to to
go to find out means to test to see at least the more widely known coupling
deviations matter which level is it it's not worth any more to go in find out
meanings phrases for the single by single differential cross section and then it's
it's rather it takes more importance to move to to double differential
measurements.
So for example
okay she wants to the
deputy distribution for laptop system channel for Atlas we already pushed the
inbounder is a lot and we start to have final billing with stuff also strong
correlation between the various measurements is something that in
principle you would like to To avoid and then the on the double differential
variables. Here we are.
Still, I mean,
gamma gamma is less problem with respect to for laptops. But in general when you
start to increase the number of jets and you're set to push a lot to the deputy
Ranger you go in very remote face base we're here just a matter of taking data
because the in some cases we have empty bins, we just have to put upper limits
there.
Okay, thank you. So I don't see any additional questions I propose to move on
to the next presentation. That is about differential theory predictions.