Processes, and even by looking at this we see signal distribution.
Usually picks at different point than the backgrounds.
We run a a pretty simple maximum likelihood to extract the the limit on the cross session branching ratio. We use a set of.
Systematic uncertainties. These are mostly normalization.
This is somebody uncertainties, and, of course, some statistical uncertainties as well.
So the limit on the left shows the cross section limit on the cross section of the of Z, where H. Goes to A and also A goes to Ln. dB. A goes to B without.
The limit is an order of like Milli.
We tried to.
Make a comparison between these results and the the existing Cms. Results on the right side. You see, that's the limit. On the branching ratio of the Hicks to a A to be without when you combine all different out channels, and this limit is on on the person level. Yes. So you see, Cms order of like one to 2%.
Limit on the branching ratio.
So if you want to kind of a comparison between these 2, we have to divide the left plots by the cross section of the Z. This is, I think, what should be. This plots are are kind of.
Pretty new, and we're still digesting them.
So if we divide the left values by the cross section of the Ch, we get the the limit on the branching ratio of the Hicks.
And if we do it kind of back in envelope, calculation and comparison, we see that our results are with one inverse auto barn.
Is is sort of better than the current Cms run to results.
We've also produced a model, independent limits. We have done it in different type models plus a singlets. Well, this is Type 2, where time. Beta is said to be 5.
So from the theory paper, you know. You see what would be the branching ratio of the A to different models in this model.
And if we scale the previous limit to these branching ratios, we get the the limit on the left side.
So the limit on the branching ratio of the.
Of the Zway of the Hicksway a would be at the order of around 10 to 20.
And when and when we compare this with the with the Cms. Results? Well, we found that, same as this results by combining the 2 Channel Vb. And numb.
That limit is also at the order of like 10. So it seems also, and model dependent side. We we also are comparable with the with the Cms. Results.
So with that I I will just summarize. That's a sort of a visibility study of the exotic. They have the Higgs to a pair of e bosons when he is produced with with Z.
And the math of the A. Ranges from 20 to 60.
We have a dedicated towel algorithm.
That we've seen improves the signal selection and the results looks promising.
And we have few ideas how to even.
So far, but I've just considered the care of the z to ee mu. But in general one can consider the care of the Z to everything, even to neutrinos, or to to quarks.
And that will give us a factor of 10 more than a factor of 10 in statistics.
And you know this is soon to be like a clean.
Environment. So we're able to reconstruct the very role. So there is still lots of room for improvement.
That's it from my side.
Do you hear me?
Thank you. Yes, sorry. I'm not sure who's.
Going to chair now, Rebecca.
Okay, thank you. Bye, Rebecca. Okay, no, that's the mission. Okay.
So hmm may. Nice presentation and.
So what are your plans regarding.
Our, the.
Having plots to show for our.
Presentation for our report.
Yeah. This results were 1st presented in the Lcw. Conference.
In Tokyo, and we were kind of working on the proceeding, so there would be like a a complete documentation soon.
And in in in aqua meeting in Paris. We have also this. This abstract was accepted. However, we were not able. We're not able to participate in.
In that conference we have been asked to provide like an offline set of slides, so people can take a look at that.
And, by the way, this is, studies cannot be part of the.
The excess scalar working group
Efforts that Flip is is Cherry right now, and he's also going to show.
Couple of these plots in in the actual workshop.
Okay, if you can kindly.
Se. Send us a draft of our proceedings by the end of the week. It would be useful for.
Yeah.
For us to take it into account in our.
In our laptop. Hmm.
Yeah, I know the deadline is is just beginning of next week. So we try to kind of wrap up things, and hopefully we'll have it ready by maybe Monday or Tuesday. If that's okay.
No? Well is that Monday, Tuesday we we have to present our document, which we need as as an input.
Cool. And what is the deadline for that.
I like those yesterday, and.
Okay, so yeah, with.
Okay, no, but as a that's what the Juliet said at the beginning. And we, if you, if you can provide by the end of the week, something we can have a look at. Okay, these lights are already very good starting point. Then we can. We can use it. Hmm.
Okay, sure. And.
Thank you.
Alright. Okay.
So I see that there are questions by both slash comments, by Rebecca and Juliet.
Juliet was first.st
Okay? So indeed, thanks for this talk. I'm sorry I have a kind of basic question you said you use mad Graph and Pithia 8 and and Delphies. But are you using sort of bare Delphies, or the somehow Fcc. And key fourp.
Delphi's, and do you? Do you use Fcc.
Well, no, actually, this was Ilc. This was initially this analysis designed for the like cube experiment. So we've used the the Ilc designed for the deltas.
Okay. So now, maybe I have a question for Rebecca and Jackmo. How do we.
Do we worry about reconciling all of this.
What?
Like, with a jet clustering, and all the the differences.
That that could arise. I don't know.
Okay.
Well, we're in a not yeah. The point is that we're not kind of relying on the. And this analysis, yeah, for Bb bar, we just use the rest of the events, and we also have, like a pretty simple approach for reconstructing the tow's.
I don't know how electron would be different in in these 2 colliders.
But but yeah, this analysis was initially designed for a linear 2 50 Gb plus minus collar.
I think is is fine. I mean there is no.
Requirement to have for the, for the final feasibility, study.
Everything synchronized in Fcc analysis. Right? It would be nice to see it in analysis. But it doesn't have to.
Okay.
So. But yeah, it's something that we need to. Yes, I mean, it needs to be clear in whatever you guys need.
Let me say also that for the notes.
We don't have a template, but at the same time, if you don't have time to follow a template, and you want the results to be included.
You can, even, you know, put a cover on the slides. There are Pdf and uploaded, I mean, yeah, it might not look the prettiest, but I think.
Hmm.
It would be nice to have this results considered somewhere. It might not make it to a lot in the in the report, because it is not so much a space, and at least now. But if you ask, I think, as left.
And the 3 of us. We don't control what goes there really? So. But it's just to make sure that all the races are covered, and all the analysis are there somewhere.
So, yeah.
Just another question. You, as.
You have. I see that your plot is for one us. As far as I understand.
Inverse.
Yep.
So if it would be easy to do it for 3 versus. Like every other plot we have, perhaps it would be.
Oh, yeah, it is. It is. I think it's visible to make this with 3.
Yeah.
That's easy. Yeah, we will. We will do that.
That was one of the points that I have. Also, I guess you made the one to compare with something I don't know, but it is striking.
So what was it? A question?
No, it was used to. Yes, to agree basically with making the limit, with the right luminosity.
Okay.
This is the Hicks production, so it should be the.
Should should be, the.
The 240 luminosity. Not there.
Not today. Let me ask you, of course.
So this you should. You should look up. What? What is that? Our default terminos.
For the 4 ips.
For for the 240 and and scale to that luminosity. Yeah, so they are 2 bunnies, of course.
And what is that luminosity? Just a bit.
I don't remember you, Rebecca. You remember.
Yeah, I should know this because we've been working on the on adding that table to other places. But it's somewhere there. I mean, we can find it and send it to you.
We can. We can write it to you if.
Okay. Thanks.
As Michelle yesterday, and he was 10.8, which I mean June. I took.
Alright perfect. Then you can take it from one stock.
Good.
Okay. Yeah.
But at least you have a.
The numbers of our vaccine, even if the detector is not exactly the same.
Okay, any more questions.
I do?
Can I ask.
Yeah.
So I think this is a super nice study, Abdul. I like it very much, and it's really powerful compared to Cms, which also makes sense because we're talking about light things right?
But I have a question about backgrounds.
So you are considered, and and in general said age.
How I mean, you have background 0, or is this studio that allows you to separate from the background? How does this work? Exactly? I mean these cats that you are listing in here. Does it set you up with background 0, or you still have some background.
No, we're not background 0. We do have background, especially the Z, which seems to be some sort of irreducible background, because that's exactly your signal. Well, he's here in San a case to 2 particles.
But you know our signal goes to 4 particles.
But with all that, we do have some contributional background. You see here in the bottom.
Where we have, like the easy contribution. And also we have the.
Even more important. So we we, we might have contribution from other backgrounds, but but those are, I would say, rather small.
Especially because, you know, when we're able to reconstruct the hics very precisely here on this plot. So we apply like a window, narrow window here.
So, if all backgrounds, even like Zz.
After applying the cut on this window, is kind of suppressed.
Substantially so. We consider other backgrounds to contribute very small. The main one is likely to.
No, this probably you, indeed, can never get rid of, I mean, from my side. I look at the analysis and automatically. I always think that we are. You're doing a long analysis, but this is a prompt one, right, or at least you are not explicitly asking for displacement at all. You are. Yes.
You know. Okay.
Yeah, exactly. This is this is prompt.
I mean there is. There is in the event background that you cannot really.
I mean the yeah, the Higgs background that you're gonna really get rid of. Indeed.
Okay. But this is super interesting. I I like it very much. So I really would encourage you to to try to give us something for the.
For the final Fcc study.
Report, or whatever it is called, because I think it's really nice, and it's nice to have the limits.
Something that we don't get so many.
Thanks.
So we're thank you.
That was the I wanted to know about this. So thanks for explanation.
Okay, if no more comments, questions. So we.
Can go to the.
Is by hub.
Hi! Can you hear me?
No! Can you share your slides? Please.
I uploaded them.
Yes, but to present them. Can you share your screen?
Okay, sure. Give me a second.
Thanks.
Do you see it now?
Yes, let's go ahead.
Alright. Hi! I'm viva! I'm I'll talk about exec persons and the Fcc.
So I'll try to be short.
Yeah, so why, focus.
You. You have 5, me.
Okay, thank you. Yeah. So the focus on liptoph prime is because, of course, these folk will couple only to leptons.
As a result we'll get better bounce at left, and collide is like Fcc.
And we focus on these 2 models, LEL. Mu and L, where the couplings are. To these 2.
Generation specifically.
And
For more information. You can look at 2 recent works which I mentioned here.
The 1st one especially have
Some bounce that they generated for the click experiment, which we'll see.
And here I have the fainman diagrams for the processes that we are.
Sorry. I'm sorry to interrupt, but I don't think your slides are advancing. We see still. See your title slide.
Huh!
Yeah, you were getting very enthusiastic about the title. But yeah.
Hmm.
Sorry, so you still don't see it.
No.
When you see the gover.
It says, my screen sharing is paused. Let me.
Give me a second.
Maybe this.
And now I see slide 2.
Yes.
Okay? And you see all of it. Right?
Well, I see.
But we should we see it twice.
Current slide and.
15. We are seeing the presenter mode.
You need to figure that the presenter mold, using unified hours.
Oh, my God! I mean
Maybe you just keep it like this.
Did.
Yeah, definitely, yeah, it's.
Like this is good enough.
Big enough.
I don't know. I mean.
Yeah, you could maybe hide.
I changed.
Sorry.
Yeah, I jinxed myself by saying, I'll be short.
Don't worry.
And let's remove the format. If you click on the format.
Brash! It will go away.
Okay, good enough, I guess.
Yeah.
Perfect.
There you go, almost.
Where was that? So? Yeah, maybe I'll just do it again. So we are focusing on prime because we get better constraints in Lepton Collider like an Fcc.
And these are the fainman diagrams. In particular, we'll be considering such channels with an Isr of a photon.
And this will put a Z prime on shell.
And it we can detect it. Then.
And I'll move on.
Sorry
Yeah, I don't know. I couldn't.
Yeah, so.
The signal in this case would be 2 Leptons plus. This Isr photon.
And the main backgrounds are the processes like this.
Where you have 2 leptons plus a photon.
In a standard model backgrounds.
Or you have 4 Leptons, where 2 of them escape detection.
And a photon.
So the pipeline, basically for us is to.
Use mad graph to calculate signal and background cross sections.
And then we use Ptr. To shower, and we take the detect the faults into consideration, using the Delphis Eda card.
And this idea, card cuts are used for the level analysis.
And.
I have here some
Distributions that we get. Following these steps.
You know. I'm sure I've shown the.
Transfers. Momentum of the Muons.
And the energy of the photons.
And the invariant must the orange line is the signal, and the rest are.
Yeah, and.
Once we do this. We focus on.
Something like the environment. Must that I showed you earlier.
For the signal of the Church dialect.
Sorry.
Nothing nothing going on.
I don't know.
And.
Okay, continue. And we.
Also have a coupleings of the Z prime to neutrinos.
As we are considering all the Leptons. In that case we'll have.
To consider!
And energy window. We cannot have the invariant mask, for obvious reasons.
And then we sum over the total signal and background events.
We use this formula to calculate the significance.
And then we.
Show our sensitivity plots for a significance of 2.
And which brings us to.
This.
So here I've shown the sensitivity plots for the 2 models that I've considered le minus l mu and le minus l.
I have considered here the charged dilept on such channel, so ee gamma and mimi gamma.
And I have shown sensitivity.
Lots for an invariant mass window of 5 Gv.
Oh, when I say invariant mass window of 5G. This means
The Z prime must
Extending to both sides of.
A delta plus minus 5G.
And.
I also have the.
Similar plots for the monophytan case. You have 2 neutrinos and a gamma.
And, by the way, these
Dotted line. Here is the click projections that I talked about earlier from the paper that I linked in the.
1st slide, and here for the Mona Fotan case, I have shown an energy window of 5 Gb.
And these are the sensitivity plots that we get.
Okay, can you.
I see. Quite a few slides. If you can go a bit faster, please.
Sure, sure.
Hmm.
And then.
Sorry, and I have here just combined all of the.
Such channels not combined. I've displayed them in the same plot the EU and new the takeaway here is that for daily case the.
Mute gamma seems to dominate in most cases the orange line that you see here.
And similar for the elemental case.
Here the Toto gamma does the significantly worse than the other 2 such channels.
And we have also looked at how the sensitivity would depend.
On the invariant window we have considering. So I have.
Where it does invent window from.
Point 5 to 10 Gv.
And the the takeaway here is that the smaller the resolution.
The invariant mass window.
The
Lower. We can probe into the.
Coupleings.
And I've done a similar analysis for
The energy window for the Mona Fortun case.
In this case, we actually get the best results for an.
Delta of energy of one Gev.
And not for point 5 gev. As might.
Expect from the previous one.
Hey!
But yeah, the best results are from a delta e of one G.
And I think that's all from my side.
Okay. Thank you.
Thank you, and sorry for all the mishaps.
Okay. Thank you very much.
I see that we can. There's already a.
Raised that by David. Can you.
Yes, thank you. Nice talk. Can you show again, please, the the Feynman diagram.
I want to understand how different is it from directive at our photon.
Oh!
Because in principle I expect.
I mean you. Could you have simpler? You have just a.
Just take that
Take the the channel so that top.
The top right.
And you remove the photon, and now you have. You can have the zebra and emitted from the
Outgoing or incoming electrons.
Directly. And then this guy.
Well, it's either missing energy if it comes from Csr.
Or if it decays back to.
A plus C minors. Then you will have a 4 left and final state. My question is, I don't know what.
I mean, I mean, this is I. I don't know what type of object this is, but I can think of many other diagrams that could.
That could produce a Z prime one.
Sorry I didn't understand your question exactly, so you're asking how it is different from.
A scenario where we have a dark photo.
Well.
Or you're asking how exactly or why. Exactly, we are considering this production.
I mean, both things are related. I mean, I'm thinking of I mean the object you're considering. Well, 1st of all, how different is it from another photon and does it couple that we have kinetic mixing with the photon.
So that's my 1st question. My second question is that the.
If these guys couples to the electrons, you could have an even simpler, much simpler diagram than all of those which is just.
E plus e minus
Going to Z, and then the C going back to E plus a minus, and then you've already had your Z prime from the plus or d minus.
And then either you have balance a plus and minus or.
If this object decays back again into the Leptons you will have 4 Lepton final states. All I'm saying is that.
The the type of, I mean this type of object. I expect many other production without a photo necessarily.
Which are simpler.
Sure. Yeah, I I think, mentioned this in passing.
So we are using the photon to put the Z prime on shell.
And then, when you do the impairment, can you directly.
Can infer the mass of the Z prime. From there.
As for the question about how different it is sorry.
Yeah, yeah.
Psychological. Second, wait a second. This is this is, this is true for the.
This is not always true, because you also have here a channel where you have your Z prime that decays back to the electrons.
So in this case the the ASR you need the I Isr, I mean, you have a you have. Take a look at the 2 last diagrams.
You here. You don't need your Isr. No, I mean you have 2 leftsons that have an mask that matches the blue line, which is your C. Prime.
You don't need Isr for them as determined.
Yes, yes.
Are you talking about these diagrams which I these are just the backgrounds the 1st 2 are the signals that we are considered.
And sorry. Yeah, we have.
And.
Okay.
That's very yeah. That's very confusing, because you use the blue line for for a standard model and for your C prime. So okay, so my question is, what.
I'm sorry about that. Yeah.
Yeah. So why don't you? Why don't you? I don't understand.
But why do you say that the 2 last diagrams are backgrounds? They could be signal.
That.
What, what.
Can.
No, I mean, if if you have the.
And we are sorry. We yeah, I think.
The the persons here.
Can that we are diving a bit. I'm sorry. I I understand that the the issue but.
Can we kind of.
Yeah, I guess we can take it offline. Sure.
Hmm.
More. But I mean I don't know. I mean, are we approving something which I don't see why I mean, I don't see how this is consistent right now in terms of the basic physics behind the processes. So maybe.
Rick, maybe.
Actually cos.
So remain. If, if if I may comment on David, question so essentially here you have to say, I want to do it, plus to m particles and see where they said primes kick in.
So if you do, 2 2, they said, Prime would not be resonant. You would be away essentially by a factor which is huge when you compute the cross section.
That will be taking the 1st 2 diagrams, essentially removing the photon.
So once you put the photo and you put everything on shell.
You essentially increase yourself by a factor which is.
The center has energy divided by the width.
Neglecting some mass, and this is this is going to give you the leading signal.
Now the question, if you can't produce like of these guys, sure. But then it will be a 2 to 5, and so on, and so forth. So the the.
No, no. 2, 2, 2, 2. I understand what you say, but 2 2 is missing. Energy.
2 2 is out of the question. 2 is out of the question.
No, no! Why, 2, 2, 2, and then you you.
No, no, no, no.
Because a cross section is super is damped, is damped by a factor of.
No, no, no, you no, no, you don't understand.
If if you take, if you take that propagator.
Debbie.
If.
You don't understand me. Wait a second. Wait a second. When I say 2 2 is e plus e minus going to e plus e minus plus missing energy.
From your paper.
No, no, no meeting energy, plus a minus going to plus and minus.
Perel right. This can go to Channel or S. Channel. If you look at the S. Channel.
And you are not on shell.
Given. The coupling of the set prime and given the width, is looked at. Viber was.
Showing couplings of all 10 to the minus 3, 10 to a minus 4. You are doomed.
No, no, I'm not. Well, maybe.
There's no, there's no way to see a distortion need to do.
Yeah, and perhaps we.
Maybe I'm not explaining myself, or maybe we are diverging at the convener set if we don't have time. But.
Well, I would propose.
But but I mean not. I'm not considering those diagrams. I'm not considering the teacher. I'm not considering the the T. Channel with A. C. Prime. I'm considering the standard T. Channel standard model one, and then and then you and then you're the Z prime from your electrons.
That's a perfectly lectophelic thing. You just have one coupling of your election to the, to the to the Z prime, and that's it. You tell me you cannot determine the mass. It's not true, any plus a minus. We know the center of mass energy. So we have missing energy. We know the mass of your object.
So you have e plus e minus, which are eco planner.
They are not back to back in azimuth, that they write it as a brand that you don't see. And this tells you what the mass of the object is.
So, okay, never mind. We can discuss offline. But I don't think this is a fully comprehensive list of.
Of the island. One thing one can think.
I I think, a useful thing. I I because now it's my next question, is.
Is if we can have some documentation about today's by the end of the week.
And then I think we will communicate it to David.
If you agree a bit, and if that.
Sure. Sure. No, no, I just want to.
No, no! And so so that you, so that we can let the hmm.
So if you if you can.
Okay.
So. So the question is, can you can you provide us a documentation.
And by the end of the week.
I believe we can. Jose, what do you think.
No, I mean, I essentially we have something ready to go on the archive. And hopefully, 2 weeks.
So I think we can just share that with you, or even repurpose it. So just to let that know.
This is study of Tasbout Company was done by Han. And essentially we. We look at the paper after we started doing the diagrams like he finds exactly the same diagram for signals.
Okay doing click on call, either. He's not doing any plus e minus. But it's just a matter of changing the center of mass energy.
But of course we can. We can discuss it offline.
No, I I think we'll communicate also that the.
The the paper to to the Vida, and so he he can come back to you. I think.
Yeah.
And
Sorry for stealing too much time.
Okay? Any more questions, comments on the paper. This is a topic.
Okay. If not, I think we can go to.
I think it is.
Okay, thank you, and sorry for the delays.
Yeah, indeed, it's my turn.
So let me share my slides.
Can you confirm that you can see them.
I see them.
Probably full screen.
Okay.
Yeah, they are now. They were right before even this.
Okay, thank you very much. 1st of all, for last meeting, minute scheduling of this talk. So this is a topic that has never been presented in this
A forum, but it has been documented and presented elsewhere. So.
A very preliminary result was presented last year in the linear workshop.
And it has been documented the proceedings, but that was part level. Then the detector level.
At study. Is documented in the in this archive that you can see here, and it has been submitted for publication in the Journal.
But that was for Ilc detector.
There have been. There have been some presentations. Some of you might remember last year last October, and past them a talk given in the Ecfa workshop.
And this year there is a talk scheduled to be given in the meeting in
Paris, by Redami.
Okay. So most of this work has been done up to now, considering, let's say, umc options, ilc detectors. But here.
We started discussing a bit, considering.
Fcc options.
So a bit kind of introduction to angular. So this is a different, let's say, approach of
Looking events. Not necessarily looking for new physics. It can be other kind of collecting events that result from high energy densities. So, for instance, a so-called structure, because this correlations.
Are in the delta phi and delta eta
Plane,
Or delta YI mean rapidity, and angle.
Differences between 2 particles, so.
Some features where have been seen consistently heavy on a proton led and.
Proton Proton collisions by Atlas, as well.
And lately in this work. But it was recently published.
And was a data analysis of olive data, archival data.
Sold as you can. See here.
If hydrack multiplicity events were considered well, Ridge effect, let's say it's not very prominent here, but.
It does exist. So all this in what is called this correlation function, which is practically yeah.
The number of.
Pairs in the same event. Well corrected, let's say.
By the number of pairs that are in different events, so they are uncorrelated.
Okay. So this is for angular
Correlations? What about hidden violates so.
The the topic of this study is that
Yeah. Hidden Valley. We take Hidden Valley as a test bed for.
Studying angular correlation. So hidden valley as you have probably heard.
I mean they. It's not a model. It's
A framework model. So let's say that they have all in common that.
There is a an inaccessible region, let's say, where particles.
Can be produced I mean in high
Energy colliders so they can go into this hidden, this invisible.
World via portal.
And then some of them they decay back, probably.
To standard model parties, and then we can
We can
Observe them. Okay, so here, you can see the idea behind that. So we do not try to reconstruct a specific decay. We just.
Take all this blue particles, hidden particles.
Well, these particles that can be seen by us, but they are
They have passed through this hidden valley. Let's.
And this creates a different final state than the usual background that we expect to see.
So in this study we considered
As channel
Pair production of.
Dv particle. This is a Qcd like.
Hidden Valley scenario dedicates to Hadrons.
And as background, we considered Kiki bar production with Isr.
And also Ww. Production decay to 4.
Quarks. Okay.
Have to to start here that this is some preliminary results that we got at 240 Gv. We had considered so far 250 Gb.
And now you'll see. Let's say scenario, and we used fast simulation.
Of ild 4 fcc.
Here you can see. The sections of the processes.
As have been calculated with Pth for both the some of the models that we considered so have the energy of the for the Dv.
Or a bit less. 100 Gv. And different scenarios for the Qv's.
And you can see that the.
The background. Of course it's much less abandoned than.
Than the background.
So. And here are some results. I mean, there are some tests that we are doing, some checks.
So the basic idea is that due to the
Big difference between the the cross sections. We apply some event selection.
To make the signal become more apparent, so.
No secondary vertices.
A few
Neutral and charge, particle, flow objects.
We tried to suppress Isr photons with this 2
Cats here, and we also have seen that with small digit.
Invariant mass and leading mass, we have better results.
Okay, so what is plotted here for short range means that the the the small, rapidly region.
Rapidity. Difference.
Region, I should say the yield. How is the yield here for the large rapidity region.
How the yield changes the asimothal.
Angle difference so the yield is defined, as you can see here.
And so it's an integration of.
Sorry.
Of such kind of plots.
That we can also produce.
And you can see that here the background is with a green line.
And that in the short range we clearly have
In the Flora region.
We have a difference between the.
Hidden valley, scenario and.
The standard model expectation. So this is thesis of the study that.
By starting angular correlations we can have a hint.
Of new physics.
So I think this is all from my side. I mean, there's much more material in the spares.
Thank you.
Okay, thank you very much. And that's extremely interesting, because it's quite a novel way of looking at it.
So it's a.
Effectively, it would be nice having yeah, having something like that in our.
Now report.
I was wondering now about the.
Yeah, get like a distraction, because
You are. You're going up to.
But anyway, you are interested in within 1.6, and that is for the construction, because
We constructed tracks. It tracks up to 3, I think, or something like that. So.
Even 2.5. Yeah, so but they, it's what's what's relevant is the central part. Yeah.
And and you say you have a paper in preparation.
Well, yeah, the the paper, I should say the Ilc based I mean, oriented paper is already out. It's.
To.
It has been submitted for publication, but here we would like to have.
Something and some input for the Fcc study in this. For this, we are preparing well, preparing. It's almost done. The text is there actually.
The note the the note that we expect to submit it tomorrow.
I mean for the the plots, and the numbers. We just want, you know, to make sure that everything.
Is correct, I mean, so far they look pretty much like what we get at 250 Gv. I mean, no surprises.
But still we wanted to run some checks, you know, just to make sure.
You know.
But by tomorrow this will be so. I understand that this will be submitted as an internal note, with restricted access.
Okay. If it gets a delay you can very well put it with empty plots, and we we to take.
Yeah, if if we can do that to you know, minimize the.
You know them. The noise.
That would be great if we would just have the placeholders. Let's say.
With a captions and everything.
Yeah, that would be good. Nice.
You know. Let's say, Patricia said. If if we know that something we are sure it will exist.
And if we know that the plots will be will be like in these lights. We are still showing now.
And it will look very similar to these. I think we can take into account.
Great! Great, that's great!
Rebecca, says, the lower the hand.
Yeah, I did. I did actually over the hand because you asked the question, because I was wondering what was the plan for the publication. But I think it's nice, and I think uploading a placeholder even is already good, because then we can. We can take it from there and.
Yeah. And then, and you can also look at the published paper to some extent, what's happening.
Thank you so much.
Hmm, yeah. Nice. Any more questions.
Thank you very much.
Comment.
Okay, no, thank you. Again, it's really interesting.
Thank you very much.
And next one is Nicola, I believe.
Jean-seyfingson, Whatsapp, l'ungent-scher che cagnoli vi rende.
Yes, Nicola, please.
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Thank you, Nicola, and.
I should add that there are a couple of
Yeah. You you see now the Pantalis, which is gonna speak about about the the electron version of the thing.
There. There is also the path by side, and the Muon path by Lorentz Gamba, which I'm going going to appear soon.
Plus. There is the work about the the MoD, the realistic model, with the with 2 neutrinos.
By by Sophia and Company, who is also.
Who's also a note? I think so.
I.
So Juliet.
Hi, thanks, Lou. Sorry. Maybe you said it, but I I've missed it. So on this slide, the the top right plot in the legend, you say, Cms, what does that mean?
And magic means. My Joannah.
Vi.
Okay. But why? Why does it say Cms? Then?
Is. The single is a single major, and it's not the same model.
Hmm Dylan.
This model has 2.
To shadow diak. So it's not exactly comparable.
Okay? And what's the significance of Cms.
Vi.
No, because that's the limit. That's the existing limit on the neutrino mixing with the.
With the new move.
And there's a and they multiplied. We multiply the.
Multiplied it to to see what it will be. Also. This is a recent plot by Cms. And then the the blue one is multiplied by the square root of the luminosity ratio between now and the illumina. Still, let's say.
Okay. Thanks.
And just to to show that that it will be a.
It will not be screwed.
But is not exactly.
He's not exactly 8%.
Rebecca.
Thank you very much. I mean, I think this is a really nice analysis. Right? So there is. No, I have no concerns about it in any way. I'm thinking a little bit more in a more general terms of organization. You mentioned it already. Also, Yakomo.
That the idea is to work together with other highlights analysis. But maybe it's worth to mention in this.
In this meeting a little bit how we are. Gonna exactly. This is a good slide, how we are gonna do this plot, because I think the update of this plot is gonna be.
One of the most important figures that we can have from the Bsm side towards the feasibility study. So can you remind us how.
Is there.
Well, the idea we discussed, as you know.
Is that we will have 2.
Like like daily Cs payment term even this. If it does model a toy models, we'll have a 1 plot like this one for the new one for the coupling. So for a single, for a single neutrinal coupling with the with a single new one.
And with a coupling with the with the team and and one.
For the single muonplings with the.
With the electron.
And we will have both. The hmm.
Hmm, semic and the full electronic one.
And we probably have also a plot instead of
On the on the Hf. From on the HO. On the model which.
Corresponding to to the benchmarks in which you have to to my anaes will probably have one of the plots from the paper which which is being published.
But I'm gonna say.
And probably end of seulation probably will not have a rich plot rather than.
Some kind of.
Yeah, but it's nice to have the oscillation.
But it's that kind of a yeah show boating where you show how how beautiful you you get to the other.
Cool. Thank you, and thank you so much.
Vi.
Okay, any any more comment question.
For the work.
But wise. We can go to the to the last talk, which is the same topic by Pantel.
Yes, thank you very much, and I suppose you can see the slides.
Yes, yes, you can see them.
And since we are a bit slightly off the time schedule, and I know that I'm last, so I will try to be fast.
So. Yes, this is a brief summary of the analysis that I'm going to present during the Echo workshop in 2 weeks.
In Paris with this title.
And yes, I will try 1st to introduce our analysis, then describe them. A single learning method we applied, and finally compare the results with the current account method. Before summarizing our findings.
So let's start.
Yes. So our focus is on a mass range of the Hls between 10 and 80. In the context of the Rakuten model, it does Nicola say? We specifically for the electron state with 2 jets.
And
Yes, and we analyze this bundle with mixed down to 10 to the minus 10.
So
Of course, to study this sickness, we need to account for significant 3 main backgrounds.
Are considered for this analysis to be busy. Is it Cnc. For body.
Final state
Some.
Here you can see the distribution for the colleague lead and electron without applying any selections, both background and signal. So you can see that the background for this sees it will be picks up lower values as expected, while the 4 body decay has more signal, like distribution, which is actually the main background. After applying all the cards.
But
Yes, so here.
What I I was trying to say here is that due to the limiting statistics for the standard model processes? Our results are, we are performing investigations.
To 10 inverse February, where we have enough statistics in order to perform robust analysis, and then for the finalize that we skate to 115 versatile bar.
But of course this is not optimal in our case. I will explain. I will elaborate a little about this later.
So
Okay? So initially, with the employment, the traditional method and message as mentioned in a master's thesis.
By Dimitri, and this method provides a baseline for our optimization. Iphones and comparison with a massive learning based approaches.
So what exactly did the what we exactly did here is to apply selection, as you can see here. To.
To see how, the environment of the day that the system electrons.
Are behaved to make the significance, and then to make the final.
Sensitivity plot scale to 10 factor. But the significance is compute computed by using this specific formula.
In order to improve sensitivity, we tend to machine learning. So we developed 2 key models as Tom presented in his master thesis in 2,024. This is a very fresh one.
So the the 1st person is boosted decision tree.
A model using exibus that the deep neural network is one, the one using tester flow.
Just to say here for both models we use a binary classification, so to distinguish between signal and background.
Of course, the Bt method is well established physics, and also the Dn. But it offers more flexibility, but requires careful tuning.
Of hyper parameters, and for each one must point we train individual models in order to capture
To to get the most of the sensitivity at different energy scales.
So here you can see that the variables that are used for both Bdt and DNA, we used the the d. 0, the significance of this 0 for the leading electron.
And also some kinematics for the neutrinos system.
And also the data are, but in order to improve the use, the vertex and tracks, variables.
Like the number of tracks. The Chi square of the vertex.
And
Yes. So here we compare the results for the 3 different methods that we used from the beginning.
So our results, so that the Bt model outperforms a traditional catal method by 2 orders of magnitude.
In terms of sensitivity. While the Dnn offers an improvement of approximately one order of magnitude
but with more sophisticated and better hyper parameter optimizations, we significantly enhance our analysis.
To to reach the sensitivity of the Bdt. But also to outperforms this one.
But this is for future studies.
And here.
On slide 7. As a summary, as a conclusion.
He is a very nice plot. But please take this.
With a grain of salt, because some of these are under investigations.
And just to be aware that the Cms. Results on here is for 130.
While the other is scaled to the full. Sec. Luminosity.
And also another thing is you know, the purple line is the one which is supposed to be taken from the.
From this paper, but actually it seems
That if the one from the paper is has better sensitivity. I think we extract.
From Louis's master thesis that there was something
A relevant one with a 2 or 4 signal.
Signal events, and without any background, with 0 account, actually.
But this needs to be further investigated.
Of course, what we see here clearly is that
Our missing learning models significantly, expands the face.
Coverage compared to the kind of count method, of course, by by checking the current account.
And the the machine learning the best result for the machine learning.
Of course, while we made a great effort with machine learning techniques.
The most important thing here is.
The increased motor, so increasing Monte Carlo statistics, especially in the signal region, will be essential for more robust analysis.
Which is currently at a discussion with me, Sarah and Gerard, in order to see how to minimize the.
Filtering during demo production.
So I think that's all from the electron. And yes, let let me know if there's any comment or question.
Okay, thank you very much.
Until is no just as a comment, it's
Indeed it's it's well known that.
Indeed.
With the end. If you have, if you don't have enough training events, the DNA is less stable and less performance, and needs to be so.
And actually, I'll I saw your mail yesterday about wh what the magenta curve is, and we think we will. We really hate on it, trying to to figure out
Okay, so that's good to discuss it. Offline and.
You know. So I I've been busy with this meeting, and so on. But.
Of course.
Yeah, just yes, just to say that. Increasing what? The card statistics is not important only for the training, but also scaling to the full invest of our, because otherwise we don't have a lot of statistics in the Signal Bridge.
No, of course, that is the problem. And then you have 0 and the 0 response to plus or minus 2, 3,000 events. But.
But for the, for the training, and it becomes.
Yes, I agree.
The algorithm. Then that doesn't work. If you don't have.
I agree.
Rebecca.
I would lower my hand.
So I think this is interesting. And I think, in fact, like what you said is before that. By using machine learning, you can just reduce, like the the curve.
From the gateways. Analysis to the ur sensitivity. Now think it would be nice to have a quantitative value, because I think that will be the kind of line that will actually fit very well in the.
Absolutely. Yes, this is, yeah.
In the study would also justify some more. Yeah. So I think it would be nice to. Yes, have like, yes, this number, right? Okay by using the limit to whatever. And I think it will be a very nice take home message already from the analysis that for sure will be included. So.
Exactly. I'm try to extract this, and I you know these numbers as soon as possible, and probably I will say it to you.
Hmm.
Thanks.
That's very nice. So thank you very much. That was it.
The timescale of pace. We could have something like that.
That would be nice.
For for the moon as well, so we can. We can also check it as well.
Yeah, it is.
Sabrina. Patrick is not here anymore. Is anybody else from.
No, because it would be nice to know if they are having a section related to possible, like a machine learning AI and things.
Related to analysis. Maybe there is. But
In the act for her works, or in general.
No. In in the Fcc. Study, in the report.
Okay. Okay.
On the other hand, this is a kind of a.
Standard machine learning, I mean, is not today.
That's still good to say it.
No, no, it's good, because this is what we are using at present, all analysis of Atlas and Cms. Okay, what is interesting is showing that indeed our analysis, once we will.
Once you would go with the stuff people are using now in the hill. Experiment, instead of a quick and dirty count, is
Could gain a lot. Yes, I agree in this sense.
Yeah. And of course, there are a lot of discussions to, you know, some more sophisticated architectures like, you know, the transformation mechanisms. But this is.
Booth.
You don't know exactly. Then you can have all these all this magic stuff, of course, but.
Yeah, but this is for future work. Yeah.
Maybe we don't need and.
But this is probably the kind of easy, easy stuff which on which I created most of the time.
Because it's it's.
The the event is represented by a small number of reality.
Thank you. Ponte.
Thank you.
Okay. So Juliet?
Yeah, thanks, Pintos. I think this is all looking good. I just had a really small comment on what you and Jackmo were discussing right at at the end of your talk.
For the figuring out what this magenta line is. If there's any question that you know, it'd be best addressed to Louisa, you couldn't feel free to, to just email her. She still has everything, and.
W. Would be happy to to help.
Yeah, sure.
Yes, sir, so I had this in my mind, but you know, did have the time to write us, so I think this would be done in the upcoming days, or probably today.
Okay. Cool.
Thanks.
Okay? And and by the way, these are, we have the we have already. The teachers. Are you going to dump it into some kind of note, or we just realize that this is.
Well, probably, if it is.
Okay. But.
Helpful. I will just you know, upload some key plots or some you know text in order to just summarize everything.
Yeah.
Okay. Thank you.
Okay, I think we.
We are told, with our talks.
Is there?
And I think we have a.
Quite a rich.
How of material that we can.
I can consider for.
Putting in the document.
And is there any additional comment?
Just to echo, thank you to to all of the speakers and everyone for participating. This is was a great meeting to to have, and of course timely, but also just in general, for us to to get up to date on.
So many different fcc analyses.
Okay, so.
Can close the meeting. Thank you. Everybody.
Thank you very much.
Thank you. Bye.
Move.
Thank you.
Month.
Bye, bye.