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Nikolas shanell he will be now talking
about rare top presses in CMS.

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Thank you very much. Do you see the
slides? Yes, we see the slides and we see

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you I should probably first canceling.
Yes. Okay. Thank you very much. So, yeah,

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I will present the the same, the same
processes here, stock processes. But this

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time the measurement that we do at CMS and
the outline of the talk is the following.

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So, I will present some two measurements.
For those processes. I will start with SR

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plus d, then also for the SR plus gamma
and on Monday, and then there will be two

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flavors of foster community analogies, and
the plot shows the production cross

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section For different processes, we've
stopped clocks and you can see why we call

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them overhead processes. Just the fact
that there are three orders of magnitude

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between TT bar and TQ or TMS Q and two
more orders of magnitude for photo. So

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these are really rare causes. So why do we
want to measure them? Obviously, if you

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can first observe them, which is the first
goal, this will constitute this test of

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this phenomenal prediction. Especially
better but if GCD but also a little weaker

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correction. GTC Q and T, gamma q processes
are electroweak produced and they have

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some features associated to that. And
also, default of processes are mainly QC D

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induced. So it's not exactly the same kind
of couplings you're probing. However, what

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is the kind of connection between those
three processes is the fact that you can

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prove The top was uncoupling. So Tz Tz Joo
Yang began actually with muesli. But

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interestingly, you can also probe the
Higgs top you can walk up in the photo via

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the, the actual diagrams. And you can use
all of the three processes to measure two

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sets of possible deviation in the
precision measurement. And then it's

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sensitive to new physics and you can for
instance, could result in the framework of

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the effective sheet theory which I will
show some of them. I start with the singer

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topless the analysis performed in the 3d
Tom final states with 2016 and 17 data

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with relatively low PT of the leptons and
obviously you also require to have to have

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the leptons of same flavor but it's sign
and fitting with z. z was on April This is

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so as I said, this is a recording
produced. So this has the feature of

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having a fallout jet. We go to 4.7
supernova PDT and you can use this fact to

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discriminate signal from back on you have
on the bottom left an example of

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distributions here are the recurring Jetta
showing that indeed around two or three in

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pseudo IPT you have increased the signal
of a bad comment. So that's quite

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interesting. A very nice feature of this
analysis is the fact that we work with a

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lot on identification with ability on the
plot the blue triangle is the is the

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little ad efficiency in the previous
iteration of the analysis, which has the

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which which are heavier than evidence and
in red and black, you have the new Working

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point, you can see that first of all, you
have an increase of efficiency now you are

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more than 90% for each return strategy,
and then the background is reduced by a

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factor of four better. So, this is a huge

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but still the same, when even if you
reduce it, you need now to estimate this

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non combat on residual, which is made of
basically TT bands projects. So, we use a

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fake rate method, we estimate the fake
height in our TCGA data, we've loosened

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the leptons selection and it's applied in
sample we basically you applied the

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selection but you you loosen the criteria
and Sati percent uncertainty the same. We

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also have to control agents for the
diversions and for the signal extraction

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we use three different categories in news
feeds where we use the be some validity

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discriminant So, the first region on the
left panel It shows the region with where

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you have two or three digits among which
one digit, it constrains mainly to the

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queue as well as our processes, but for
TTC, you would have to go to detours

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origin which are four digits among which
one digit and as well as two digits. And

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if you fix maintenance lead the three
regions, you would get the results shown

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on these slides with a measurement of the
cross section agreeing with the Standard

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Model prediction and the significance for
observing this process is now 8.2 sigma

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observe while it was 77.7 expected, so the
process is observed. The main

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uncertainties here are the non comeback on
the JT energy scale it on efficiency

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finance the stabilization Institute to
scan uncertainty which are the tools as

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being related to the modeling and 3d
modeling and you have to fully released

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the details here, I want to attract your
attention on the fact that if you plot the

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PT of the symbolism for high values of the
BDT you have plenty of events and this is

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quite nice. So, now this measurement is
made much for differential measurements. I

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move to the next analysis which is SR
topless gamma performed in the immune

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quantity channel with 2016 data to jsoc
requested with one tag that digits the

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dominant background is dt plus gamma as
you can see in blue on the left, there is

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also in red, quite some residual
background arising from non POM photon and

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which is mated with the fake ratio methods
where you'll be like different equipment

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and usually query to miss identify a
nonprofit As upon photon, I forgot to say

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that the plot also shows the fallout jets
suitability, which is a very good valuable

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to increase the discrimination in analysis
perform with ability the ability output is

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shown on the on the plots on here and
indeed default is one of the most

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important viable the analysis the
extraction of the signal is performed in

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the following way. So, there is a template
for TT plus gamma, which is a one of the

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main backbone is obtained from data in a
consolidation with an additional digits.

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And you do then a scimitar newsfeeds of
the signal to McHugh and also of gamma. So

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this led to the first evidence 40 and IQ
we've been obsessing if she comes up 4.4

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sigma. Well, three sigma was expected and
the measurement is already dominated by

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the systematics. Genetics can be taking in
signal modeling, you can see that within

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the uncertainties the predicted cross
section is in agreement with dimension. So

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I move now to the to less than many this
which other photo up and I start with the

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first let's say flavor. Where definer
states state analyzed has one Lipton or

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two leptons of opposite sign. This
analysis uses 2016 data. And the strategy

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here is to go in the region where there
are a lot of jets

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because among the top stays on one or two
deals are just decaying jets. You can go

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to the seven or eight jets region require
you have a loud HD of 500 gV. And for the

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daily tone, you can go a bit lower in the
number of jets. But but this is still the

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same kind of strategy. An important
ingredient here is the atomic

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constructions you minion dogs it's the one
with the BDT train with the good let's say

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the right assignments among old user
facility for Justin that damage arising in

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fact from the corrections are needed. So,
you see that here most of the time the

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background is is a TT ba. But and you are
in the region with majors so you not know

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know exactly what what's going on here for
the signal that you have never measured.

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So you need to correct for that and you go
in a high jet multiplicity in Region One

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Laptop and you can measure a basic scale
factors and correct the signal with this.

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You also use the sorry the dedicated
measurements of teaching me another

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measurement existing performance you miss
frosty back recipe. And do so, this

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component is easily rated using using this
measure not at certainty the strategies to

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categorizes the number of jetan digits
that you feel that is shown on the left

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some and even BD T's are constructed four
different kinds of agents which are shown

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on the on the right using the scarf or the
other the tiger many as many drivers of

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different times in some valuables
formulator and sorry, electrons in the

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beaches. results for this analysis are
shown on the table. Basically combining SR

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and dialects on you can only exclude cross
section written and 5.7 times the standard

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ngmodel alone. But if you combine with me
tips on this goes to effect of sorry to

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vote Two times the standard model and
politics to the senior sense that you

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could measure with the media on analysis
alone. I'm speaking to you about the media

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companies performed only 16 data, then
adding this one little two little sign

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improved by 10% and I will show on the
next slide, what what became the regional

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plan is when we included the fluent So,
still here on the one intellectual

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autonomy sign, there is a interpretation
which is going on if it's up to E. You can

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constrain the four Kwok behaviors in
dimension six you do some assumption

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especially you you want that to those
those operators are impacting just surgeon

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ation quacks and he just found out the
assumption in the DMC stuff. You neglected

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to review characters because they do not
to be kosher and once you assume

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kinematics of disarmer then you can derive
the limits on the measured cross section

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on the four operators here and you will
meet between two and eight t to the minus

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two on G with some coefficient. I move now
to the last analysis which is the fact

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that in the muted tone, by muted tone we
mean same sign dialect on or greater than

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street it on final states. The function
with full on to data against you there is

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allows me to PCT a bit less than in the
one little two little case and in the

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background is different. So previously it
was basically TT bar here you can see in

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green and bluish gray, that it will be
teaching w NT th we've also non negligible

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nonpoint back home. The strategy here is
to use a multi layered classifiers While

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in the previous iteration of Genesis we
were just using the code base, which is

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each of us as

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classifying the events in the law of
latency jets and the Jets. We've to

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control region for the TV back on this
estimated with some collections also from

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data. So ASF is a collection from teach
about the ties applied to w z simulation

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tvV already jets collection visiting in
70% increase in addition it is applied to

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teach h w and Z. And then as standout in
unmuted on analysis, there is a chart

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misidentification background estimated
from z data when you flip the chart of one

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of the lips on and there is the non
complete from Viacom estimated in a way

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similar to CQ analysis. We've estimated in
the competition On the status of chin,

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there is the possibility distribution
showing showing nice agreement between

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data in general and the observed
significance here is a 2.6 sigma. So,

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gamma from sweet G's beta is very close in
agreement with the Standard Model

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prediction of an electricity Pacific. You
have on the right the full list of

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systematic uncertainties among which the
main ones are jet energy scaling

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resolution be tagging and of course, the
modeling with the turbine is

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last.

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Yeah, last slide basically before the
conclusion is interpretation that we do

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with those measurements and important
interpretation is related to the topic

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sculpting. So, we can also measure it here
as I said, using the actual diagram It's

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complete one tiny tweaks measurement also
not as quite as precise in the result is

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shown on the plots and we reach basically
Cataclysm done 1.7 95% confidence level.

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So, this is this is this is very
interesting actually, you can also do also

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interpretation like the measuring the
person object parameter, which basically

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modifies within the framework of EFT. It
will modify the Higgs boson propagator and

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also coupling to clock in lectins. The
value we obtained here as a result is

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compatible with your own sensitivity that
you could get from off Shilajit

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measurements which is interesting. And
there are many other interpretation

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available in the paper related to dark
matter. Two is a bit muddled or h&s isn't

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it? coming to my conclusion. So, for those
processes, I have presented your

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observation of acuity, five messages,
remaining improvement in the electron

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identification. And I think we will soon
go into differential measurements to an IQ

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has first evidence and observation is the
next obvious goal for the photo cracky see

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quite difficult, but we are nearing
evidence and we saw that address best

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threshold and we can maybe hope foreign
observation maybe this is very sensitive

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to new physics and I think these
interpretations have something to be

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pursued. And I have noted here the room
Zoom Room for current discussion with

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addressing CMS if you want to discuss the
contents of your question.

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Thank you very much Nicola. So now we have
some time to ask questions. Please raise

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your hand if you have questions for
Nicola.

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So we have time for a question.

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Okay, I have I see one hand, okay. Oh, now
I see to first Francesco.

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Introduce yourself once more, please.

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Yes, thank you, the Francesco Spano again
from Atlas. I have one question more

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curiosity in for your one left and
opposite sign.

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Do you remember I know it's a very complex
analysis with lots of inputs and difficult

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subtleties and the multi lepton. But do
you remember the impact that pattern

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showerhead ization has in in the shower
and head organization hasn't been analysis

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and how it is treated? When you have large
number of jets?

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Yes, it must have an impact. I agree. For
the precise quantitative statement is

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difficult for me and I don't remember.
Yeah,

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I agree. It shouldn't be. It shouldn't be
something important. I don't know if

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somebody else would like to.

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I guess not.

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So I see no one raising a hand too. Jimmy

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will then to the next question

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I see one

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please go ahead yep

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yes yeah this is similar on this from
Atlas.

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But then to apply and W crease extract
jets for your daughter something like 300%

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plus j h eight jets and since you saved
for me to leptons you apply some

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corrections for a cipher Sir, do you know
what is the order of magnitudes of these

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equations applied form Do you proceed or
extra jets and it's the same order of

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magnitude of uncertainty and plane in HS

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I think it's not it's not like the BB on
It's not 70% I think it's less but Okay,

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so here I should I should say that I don't
know may have the exact number but you

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should be able

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of course we would like to hear that it's
30%

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I'm not sure

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I'm not sure that those 30% that we see in
many analogies arise only from to city

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basically. And so I don't know if it goes
I don't know the precise number but but i

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i wouldn't be surprised or that just just
so it's exactly 30% 10

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Okay, just to say that cuz it's not super
sensitive, very conservative, very

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separate don't expect it to be at the same
bedroom. Yes, as an actress, but yeah.

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I mean, we have seen the certain
percentage Elsewhere in CMS CGH analysis,

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you know? So yeah,

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you talk about the 30% certainty on
multiple platforms, right. I was just

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relieved The question was on teaching w
basically.

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As far as I understood not only D
uncertainty, but you take the correction.

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The scale factor.

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I think they do have a control region for
remember.

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Yeah, so I checked that in the trip based
analysis.

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There is a TT WP Engine. And if you look
at the number of events, it's slightly

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above in the data relative to the Monte
Carlo, but it's like almost Yeah, maybe

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even 5%. So I made my guess That is a
correction algorithm most of the job to

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move the sequence things of tGwU to
basically to one in data. You have to push

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it. I mean,

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now,

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is it the only reason of this agreement?
What No, sorry, is it the only reason why

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is it the only reason explaining this 1.3
factor? I'm not sure. But at least once

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you correct yourself, so, you you you go
to an agreement between t GW predictions

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in the simulation and what you get what
you have in this control.

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Okay, um, are there more questions for
Nicola

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and we might have one or Okay, I see one

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But that's from I just got a new new
question and or Okay. All right. Yeah.

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But we have maybe a minute or so, to if
anyone has questions to the previous

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talks. In principle, we should have some
time at the end of the session. We don't

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have a lot of time, but one or two minutes
if there are questions.

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Okay, I see none.

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Then I suggest we close this session.

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So as you all know, we have another two