Thanks sorry that I cannot make the full screen of my slides. So, I have only
working on this way and so my talk will be on associated production in PvP and how
they have AI installations. So first some discriminate because because associated
particle production is very broad topics so it's it's going to be interesting
interesting for thousands of reasons right. So, me Of course, we should ask our
questions is we why we are interested in these associate production process of
course, we we are interested in that aspect to that is single inclusive
particle production usually has
much lyrics cannot tell us or tell
us in a very limited way. But even that,
I think it's impossible to cover everything even not I mean, cover some of
them overview of all interesting aspects, right. So I Here is just a bigger one
point I would like to talk here. So the point I will talk is, is I mean, I'm
working a bit on especially on phenomenology side, about the double
bottom scattering at hc Actually, we already see a few of the measurement new
measurements that was reported already in this conference. So double paddle
scattering. Usually, I mean we use in the hc fullness right? So the cross section,
and you I mean, you you can, all the cross sections, we calculate the HST based on
some factorization, zero factorization conjecture. So that's the convolution of
the partial distribute function and, and the pythonic cross section that can be
perturbative calculated. Usually that we don't care about double bottom scattering
because if you looking at the Julian's just inclusive productions there, of
course you allow a lot of the softer interactions at the at the exit. An MPI I
mean, but but if you do not ask to detect these eggs, usually, I mean unitarity
guarantee that you, you don't care these right just just looking at one pattern
scattering with another part of skirts in front and that'd be to produce the
producer laptop pair for example. But if as long as you ask questions that how
things happens when I detected both my laptop and AIX, then you are going to
something of a mechanical production that you needed to know what these interaction
happens here right? The example is, for example, Higgs production z and Higgs
associate production right. So, if the two are both of the interactions, could it be
hard that is allow you to do some perturbative calculations then you you are
working in the in the usual I mean master formalism of the factorization serum. It's
called the double bottom scattering and these actually this kind of I mean, this
is Kind of mechanics has contributed a lot both for some signals if you're interested
that you get interested in the development of scattering studies or to the
backgrounds right he example is effects production, but I mean of course, this
sometimes you need to care or of course, the DPS productions well, but for these I
mean probably not relevant, I will tell you that because usually DPS is high test
contribution, so usually power suppressed to come down to the single scattering. But
I mean DPS can be enhanced it right. So if you see that you have the two part tonic
incoming platonic PDFs if you're you have PDF, you have go to high high energy. So
you have high high platonic densities like bronze to the small eggs, then of course,
you enhance your sketching subsections. So normally, that single paddles scattering
you just said the at hc, for example, it's just at the bottom density squared, but
for DPS advanced scattering paddle density photos and then how to blow up with the
double bottom scattering SDHC. And while we I mean since we know that the power
counting about the other part of scattering first of course, if we do not
go to extremely large scale, we just go to some low scales a bit low but still in the
perturbative region for example, some hydro on the heavy flower production or
the accordion productions right in principle these surprises not so much. So,
you have the you have the chance you have heard to extract the significant GPS
components and also you of course, you can see me Similarly, you can see some large
yields production for example, not particularly hard yards but you're looking
at the more inclusively like the jet mouse jet productions they have a lot of I mean
large yields cross sections. So the normally you have to see some DPS company
All you can precise measure this process then you may see some very small
deviations compared to your SPS simulations. And also I mean it's it you
need to be very precise measurements also very precise calculations in this case to
strap the GPS and then also if you're good high high energy as I say the main if he
becomes a VPS is is part of the density of the full dependency with respect to the
SPS squared. So if you get high energies of course the enhancement is is more
repetitive in the DPF thing, then SPS. So, you go to a tv 14 tv to even hundred TV Of
course 200 TV you will you'll see even more processes
in principle
and also you can go to the ion sir because if you go to the proton nuclear or nuclear
nuclear coalition, so each each each collisions you Have you have the
enhancements from that because you have a lot of nuclear enters into your
collisions. So you will see that the enhancements of DPS is more quickly then
then the
SPS
I will go to these ponds later.
So, the good thing is like SPS I mean like single particle scattering we right now we
have settled theory foundation that is proved completely proven fact law So, you
can see a room for the double bottom sketch of course, I mean for the color
singlets final state Doubletree. Yeah but also even for SPS we only approved the
kind of single is final states. So, in principle, I mean, this is the two papers,
I prefer the two, the first paper trying to resolve the coming to see that all the
billable grounds can be factorized, and a second amount to finalize all the softer
sub graphs, you'll see that the picture So, right now, in principle we can say
that okay we can write to the cross section of the two particle I mean to
interaction final state production can be writing in fact lies the way that is each
each one each and this is one atomic scattering and then the second pattern is
cancelled and convoluted is some general lies that double Patil foundation sorry
Patil pattern distribute functions, okay. So, here this is you can also view that,
this kind of way, if you imagine VPS What do you can learn Of course, you can learn
that So, you have a new way to access the information of the non fungible structure
of nucleotides that is not can provide in the in one body in a single part of
scattering that's usually relates to one body atomic structures. So, he has to say
that you you, you have the generalized the double part on distributions and these two
is simply the platonic scattering tu tu tu tu egg scattering if you want okay? Of
course it still I mean we starting from these these forms we can I mean there's a
large unknown from these two Nativity functions that matter also matter the bank
dimensional the Y the spirit things we needed to do some simplifications, okay?
So most of phenomenology actually rely on all these strong assumptions. That is
you're assuming that your your general patterns and functions can be factorized
out into the longitude boards and the transfers boards and also the longitude
part actually, you can you can factorize out and that can be factored out. Okay. So
this is the usual a PDF, single one body single PDF and these double double PDF,
okay. And also, I mean, if you assuming there's just to get rid of the idea
dependency, you have the one single just the ones perturbative sorry non
perturbative number okay to to predict to predict all the DPS sections Valley
predictive but of course you can cast to the in adults that way that these
assumptions are valid general but even me even you can get rid of some of the
federalization assignment simplification so you just have starting from these that
this double PDF actually there's only one okay in the market because they are very
very complicated to solve these is already included a multi dimensional structure
also even for the evolution itself you gotta be collaborative who have
evolutions. it's valid it's very complicated. So there's I left a few
papers you if you're interested in the last few studies on these on these
collections. So in general, the philosophy we have to how to how to be preceded for
Ah, phenomenology is, let's ask justice. If we simply pop the formula and we
compare with our predictions with with the experimental data, and if we find some
deviations and we trust all our measurements or trust all of the
calculations in this film here we can see that these deviations can be calling for
the sum more leg loss treatment, okay. So, there are a few a few possible deviations
to compare to the pocket formula. I just pick up a few examples. First is if you go
to the devil, I mean you do not use these federalized PDF double PDF you just just
working collecting these double PDF and you do the double Ecolab evolutions. Of
course you don't know what's the initial
assuming that the initiative scalable PDF is same as as in a scale of a single PDF
squared. Then you perform the evolution. You see that there's a difference is
blonde blonde over two grams at the end case with higher electric scale, you will
see that for the the most I mean probation seems lafley Okay, I mean 10% 20% for most
of x regions, except at the extremely high x reaches, okay you have you have some
problem. I mean these apparently not working work well and mo and the second
one is, I mean, when you work in the perturbative qc approach, you will see
that actually not only have the two v two scattering, okay, you in fact have the
perturbative non perturbative wrong comes out from the front. Hi, john Dang, the
drunk and the debaters sprinting into the two patterns then have the scatterings
code the two two v 2222 v 101 v two, okay. In principle you need to include because
this is not including a single pattern scattering calculations well, right. So,
you needed to include all of these contribution but you can argue that some
point, this kind of contribution, could it be? Since it's perturbative regions could
have been an activity or the contributions property suffers some points. But
actually, the luminosity itself is not if you just calculate the luminosity of the
wrong with with two grounds. And also the to mean for grants. I mean, you're for
grants and one grant and two grants. So three grants, if you see the one, the two
or two the one compares to the two for the two chip side and for the W and the cape
side mass, which means you will see that's the actually compatible.
And
then I mean, the third one is that is that you can you can introduce a bit to the
pattern pattern collections, you do not assume zero correction, aka full name, oh,
and then you ask yourself what happens in that case? So then you will see some
actually your stick by facts. Would it be not a number in mo it would it be depends
on some some convex like because the x one x two and even some scares okay. So, this
is this is a few papers and studies include these for the study this same sign
up a W you see that these these long one is human zero collisions but if you if you
have to put the collisions in you will see some the Sigma factor extracted from the
different climatic regions it's a new one new to eat I want you to is is just the
liquidity of the of the
web. Okay.
You have about two minutes left so I think it may be necessary to speed up
Yeah, okay, thanks IV IV quickly I could go through. So you will see that there are
some bitter, bitter dependent but it's very challenging because the DPS sip
itself in the WWE already very small, they projected to see that you mean that if you
find some one sigma deviation from the first being into the last day licklider
1000. Emerson's about to observe these colors so the dependence is quite weak
so actually there's a lot Hobbes
says it quickly goes through so there's a if you see that the plot you will see them
many jets measurements of final state and hc the photons as the W z bosons or
observed the DPS have a flavor own use and W Yeah, okay. Of course, here I plot the
Sigma factor from different entities you see that about the uncertainty still large
enough, but you will you may see some non universal super effective patterns okay.
So you can ask question with this rather dependent energy dependent kinematic
dependence. So this is also see the talk on the Tuesday there's supposedly sensor
same w this one The T by CMS. So, of course there's a caveat to that. There's a
traveling thing to differentiate SPS DPS is easily expand ours, we can discuss all
these how to extract the visa.
This
one example concrete example gave is the oops wrong magnify this arrow at the
beginning they assume there's no DPS SPS and then you extract all the DPS the value
if you Sorry, if you go to the include a bit of SPS you will see that value I mean,
especially automatic changes this cabinet but if you go to heavy ion, as I said,
there's there's DPS enhanced today is in particular for pa you see that is a factor
of three A times of the day but to be known as Ts, it's the scanning as a as no
nuclear modification and it is even enhanced mode. Of course, we know we
cannot neglect to these nuclear modifications, these examples for heavy
flavor and a core corneum. You'll see that the nuclear modification trade is very
large. Probably 0.47 I mean RPA so we accommodated on my paper, I tried to think
about these questions and to accommodate all the nuclear PT effect and the
geometry, the previous release pharmacology, I'm shooting back.
So,
I quickly goes through that you see that the G delta G journalize double bottom
structure functions right non dependence on these impact parameters. And, if I mean
these Likewise, we know actually the nuclear modification at different
positions, because it's one of the nuclear means will be depends on the impact
validators Actually, this has been this kind of thing is is clashing to always be
there as also you can also see from previous token, you need assuming
something of the impact paramita dependence in the nuclear modifications.
So, in the central clarity dependent observables out there, but worldwide
assumptions, these kind of functions can linearly dependent on the on the on the
sickness function. So, this gives us the idea that actually DPS in hockey I have a
equations can have the potential to constrain these dependents okay. So, this
is a concrete example I in my lesson papers see that if you looking at to the
proton and and lead Christians for the website and the nasm production, you'll
see that my DPS the nuclear modification factor with depends on at i mean i
assuming the my g function is just the synchronous function time. So, that times
a as opposed to a then you will see that it depends on the on the single part
single nuclear manufactured modification factors and also geometry enhancement also
the other terms comes.
So, either actually these pieces you can
calculate or fixed by other measurements under the same conditions for example,
right. So, in particular use I mean you see that why there Such a tripping hazard
and this kind of thing, in fact gives you a very large enhancement. I mean if you're
sick when in fact it's not small enough small enough So here is an example that I
studied. In my paper you see that for the chips ID zero production as the period.
The difference we have some description power to differentiate the DPS components
and SPS components and also DPS strongly dependent on the assumption of a g
function. Okay. This is RTA. So I quickly I think, I quickly afresh these warming
these are actually our first DPS measurements in heavy IoT become soon by
HCP has been seen on Wednesdays
talk.
So I go to my conclusion, associate production is at hc actually opens a new
area for studying GPS and if you have witnessed a lot of theoretical and
phenomenon logical and experiments progress, but some theoretical issues
still persist to better predict the future is implied. And the main interesting
measurements are coming. It's also exciting time that the first GPA studying
heavy is coming. And I believe that we can definitely learn more from these these
measurements this data, for example, I give example the we can learn actually the
impact on the dependent nuclear power distributed functions. And you can also
sync that other nuclear modification factors, how these can be included in the
in these DPS focus.
Okay, thank you. Thank you very much rushing for this very comprehensive and
detailed talk. It's very interesting. Now in order to keep up with the schedule, I
think we probably did not have time for a question right now. But we are of course
able to come back and discuss and ask questions about this set of slides and
this nice presentation during our discussion. session.
So let's think crushing again and we move