Looking forward to your talk.
Okay, thank you very much for the introduction. So I will go straight to
this talk. So I'll start by showing a Monte Carlo generator representation of
what happens in a proton proton collision. So when a heart collision happens, the
Parton's that break apart from the each of the incoming protons go through a hard
scattering process shown in red blob here, and the outgoing cartoons as well as the
incoming particles can park and shower down to the energy scale where carbon
neutral particles such as headphones and masons are formed in the can further decay
into stable particles. The final state headphones can also come from deem
remnants or underlying events such as multi particle interaction shown also
here, but in this analysis, what we are interested in Is the chats that are
initiated by a court that come from hurt scattering process. So before I get to the
main topic, I would like to give a little bit of background on what we want to
measure in the how they are related to Jason fields. So, first I want to talk a
little bit about Jeff's struct, struct substructure and even shape type of
missions. It is originally motivated mostly by search for new particles and
beyond Standard Model physics. From the perspective of ci CD, the emphasis is on
mostly perturbative part of the process. So one good example is the lunar plane,
which is a theoretical representation of parts of our process by looking at the
rate the emission density in different regions of the face space, and One can
discriminate discriminate discriminate against kcd events to look for boosted
objects for instance. So,
this technique has been recently applied
to production energy loss studies of at least preliminary results showed that the
reduced emission density was shown at small or radiation angle in detect jets
compared to all inclusive jets, which is the first indication that
of first observation of det
Cooney effects. The second example is the event shape type of measurements that
constrain the most fundamental parameter in ci CD alpha strong is one can see here
the the Jetson events cheap type of measurements in elec electron on pi Turn,
collider data
provided the strongest constraint in a wide range of tools. And when applied to
deep elastic scattering processes for future electron
ion Collider,
it is expected to be able to extend this high precision measurements down
to a lower on cue range.
So, this is all possible thanks to the theory field that has been revolutionized.
Also the experimental techniques that were developed in the past decade, for
instance, the soft collinear effective theory there was has been very successful
also, sophisticated jet grooming. So our knowledge on the preoperative part of the
process advances, more opportunities are opening
up for heterogeneous process and
this is a great time to be involved in such kind of research. So, what now we
come to the what we want to actually measure or what we want to measure the
fragmentation function, which is initially constructed in electron, it was a minus,
we are no parking prescription function is needed and it is defined as a function of
see longitudinal momentum of friction of outgoing parking carried by final state or
headwinds namely colinear fragmentation function. More recently, bell experiment
made measurements that can provide access to our own Poor's transports momentum
dependent fragmentation function shown here on the top. So, by by allowing kt
dependence in the fragmented TMD fragmentation function. Now, the
fragmentation function contains information about the preserver the
transverse momentum that is generated In the process of non perturbative headwinds
ation process, also on Star recently measured transfer singleness spinner
asymmetry of headwinds within a jet that enables access to a polarized TMD
fragmentation functions. This was possible by measuring the the asymmetries in bins
of sub structure variables to see a CNC probe, which are also relevant to our
analysis, and will be defined later in this presentation. So, at le le CB we can
access collinear fragmentation function as well as on porous TMD fragmentation
function by measuring headphone distributions within c tape sets. So, is
the LSB detector has been shown many times. In previous talks, I will just
mention that Lh CB is Key has the capability of excellent tracking. With the
feature the momentum resolution less than 1% up to 100 gV also we have excellent p
ID capabilities with the shank of the sector as well as equal in H kill
detector. So, the features that are attractive for header ization studies is
the following. So LS CB is capable of full jet reconstruction, not only with tracks,
we all are also neutral particles with the two different types of kilometers and
we're capable of taking jets from like cork as well as C and D cork. In
particular the purity of the C and D caretaking is upwards of 99%. Also we are
capable of church header and identification of In the feature range
between two and 100 Gp also less we have RS PP data sets are available from around
2877 to eight TV in round two data at 13 TV so we can study identified it headwinds
distributions within sets LCP so in order to get sample of data that that enhances
and sample of data that has a core glaciated jets, we, we look at events that
have Zeebo zoom as well as jet presenting in an event. And we also require that the
events are selected such that the Z boson and the leading or jet are back to back to
enhance the leading order events. So if you see Down bottom are the leading order.
PTA simulations show that the, the Kirkland go to z cork sub process is
predominant between 7017 year in 90%. So I'm also a forward kinematics and le CB
are further increases fraction of like rock jets, in particular up and down
flavor quotes.
So, at LS CB, we previously measured and measured z plus jet cross section, the D
PT differential cross section is shown on the right. Good agreement with the
selected theory models is shown here. giving us a confidence for a for our
measurements. So now we have measured on identified charged headphone or display.
Within the jet in the same data set we published recently in this is the first
measurement at the Elysee of charge headwinds within c tech jets and also an
affordability and measurements of identified headwind distribution within
the chat is next come. So, here I show the observables that were used in this
analysis, there are the there are three of them. So, the first longitudinal momentum
fraction are defined in this slide on this slide and the transverse momentum with
respect to the J axis GT and also the radio radio profile. So, measuring these
variables are lays the foundation for a broader head on education program at
Elysee be utilizing for particle identification charm Beauty initially jets
also multi particle correlations within jets in last week hidden just hidden
distributions in correlate appears for which I will not go into details.
So, the analysis
follows
a similar analysis strategy to previous question every CPT papers on here I just
show one example of covariance matrix that was used for simultaneous young folding
the PT object in this object sub structure variable GT and one can see that the the
team to been on migration in jet PT is much larger than the one for the
substructure variable chichi and CRI show the results on the radio profile. So, one
can see that the greater energy available in higher transfers movement transits lead
to more headwinds
produced especially at
small are close to the jet axis. It also it goes from a depletion to an axis, which
is very interesting results. And also, we compare our results with the Atlas
inclusive jet results. The Atlas results are known to the Atlas inclusive jets are
known to be dominated by cologne initiated jets. So, more in our results more charged
headphones are smart radio and fewer are
large
radio and this this is
qualitatively algorithmic With
the expectation but the the the comparison between the two regions call it
quantitatively proves that the Courtney shaded jets are narrower and more quote
coordinated than the Google Image chase jets measured by us. In also, we show the
the results on the longitudinal profile and compare with the same Atlas inclusive
jet results. We can see that the quirky initiated jets have relatively more
headphones produced at higher momentum of fractions than moon initiated jets. And
this actually on these to the next question that we have as to how the court
flavor transition between the point of horse scattering in the formation of
headroom. Hi Hi z would look like in this by measuring the identified charge
headwind distributions, we will be sensitive to this information. So, next to
we are compare our results with the Atlas of photons at results. So photon jet, like
z jet enhances project fraction. And you can see that the Nigerian momentum
distributions are more or less
similar and this is
further evidence
that the differences have served between the LCB and Atlas reserve which are due to
differences in Cork include headwinds ation.
So,
we
we've measured the the first first, the measurements
of the head the
substructure, variable CT and z but there are there are more than that. information
that we could
access by
doing further analysis, one of which is the doing the performing two dimensional
analysis of heading distribution g p t versus z. So, this will give us access to
emperors transfers momentum dependent fragmentation functions not in integrated
over z variable it's more more direct way of accessing the TMDL for the material
function. And as I mentioned, just just in the previous page, identified our charge
of headroom and distributions in jets and also additionally charge ratio of their
off. It will be statistics it will provide us a statistical sensitivity To the flavor
of the prostate initiate checks. So in conclusion, the check substructure event
shade research advancing the past decade improved our knowledge of GCD and TMD
observables gained much interested in nuclear physics community in armoires. TMD
fragmentation concerns have been poorly constructed. The LSC B has full potential
of measuring identified head on distribution within a chair in order to
access on polarized T and D fragmentation functions. So first measurement of honor
an identified header and distribution functions within a jet has been recently
published showing results that are in contrast with inclusive jets results from
athletes and similar to photons that results from Atlas and this lays the
foundation for area for future lives. related to head on initiation in Jetson
mrcp
thank you very much for this interesting results. Other questions?
You don't have the raise hand feature here. So please just speak up if you have
a question.
No questions that I had a rather technical question to your slide 10. There you show
the P t distribution of the jet. And it seems there is a systematic difference
between the POW hack and the AMC analog predictions. Do you have any Deal. Well,
this could come from
I
side.
Sorry, I didn't hear your own. So there we go. Yeah, I do not have an answer to that
question.
Okay.
Any other questions?
No, Ben, thank you very much.
And you can imagine the applause