Juliette Alimena: Okay, great.
Juliette Alimena: So yeah, welcome to the the Fcc meeting. And I have one slide of news and then
Juliette Alimena: a great.
Juliette Alimena: and then we can get into the practice box. So right today, that's what we will do in this meeting to practice a bit for for aniseee. That's next week
Juliette Alimena: and also, today is the physics and performance meeting at 3 pm. Certain time. Also. Thank you all for for joining this special meeting at an you know unusual time and awkward time. It's probably lunchtime for for a lot of us, but this is was the best time that most people can join.
Juliette Alimena: So, thanks for that.
Juliette Alimena: You know about the the workshop next week? Oh, and also I
Juliette Alimena: got an email from from from Jon about filling out a quick survey on Fcc analysis tools that I think he's going to use it as input for a discussion or bit of a hands-on session. I wasn't quite clear at Annesi, so it it doesn't take very long, but it's very like practical on using the these tools, so I think it will help him get a better overview of our needs and what we're using at the moment.
Juliette Alimena: So that's all I had. Any other news?
Juliette Alimena: More questions on that.
Juliette Alimena: Okay.
Juliette Alimena: cool. Then I will share my presentation
Juliette Alimena: for next week.
Juliette Alimena: So
Juliette Alimena: so maybe someone can can time me if you, if you don't mind.
Juliette Alimena: can someone volunteer?
Magdalena Vande Voorde: I can time you?
Juliette Alimena: Thanks.
Juliette Alimena: Then I can time you.
Juliette Alimena: yeah. So I have a plenary talk. I think it's on Thursday next week. So I still actually have a week and a half to to fix things. And I'm sorry if my slides end up being in a little. II hope they're in kind of decent shape, but I think they're not as nice as I
Juliette Alimena: could make them so hopefully. In the next week and a half. I'll I can improve also with your comments today.
Juliette Alimena: So thanks a lot.
Juliette Alimena: right? So I think I will just jump jump in.
Juliette Alimena: So right, thanks a lot for having me. I will be talking about direct searches, for beyond the standard model physics at the Fcc. Ee.
Juliette Alimena: So, as you all know, of course, there are many unanswered questions in in physics, in in particle physics, for example, we don't really understand the particle nature of dark matter. We don't know how to incorporate gravity into a consistent particle theory. We don't know why neutrinos have mass, or why there's more matter than antimatter in the universe
Juliette Alimena: and future colliders, I think, provide us with a unique opportunity to to learn more about answering these questions and learn more about how nature works, and in particular. You know, a collider is unique, because there's really no other way to explore the the Higgs boson further.
Juliette Alimena: So future providers are really at the cutting edge of scientific and technological frontiers, and therefore absolutely necessary. Now, of course, this is a workshop on the the Fcc. So you all know. A a lot the the Fcc. And I won't belabor the point. But just to to remind you that along with being a frontier Higgs top week and flavor factory. The Fcc. Is also a place where we can directly discover new physics.
Juliette Alimena: and that's what I will be talking about to today.
Juliette Alimena: So I borrowed this slide about the overall fcc physics program from Christophe Cro Koshan, and I think it nicely illustrates that the the sort of different aspects different aspects of the physics program that we're interested in for the Fcc. So there's in particular, there's the intensity frontier. And one aspect of that is searches for for new physics.
Juliette Alimena: fairly fairly light new physics, like axiom-like particles, dark photons, or heavy neutral leptons.
Juliette Alimena: and in particular, for all of these models, and and more they can. Sometimes the these particles can be long lived in certain areas of the phase space.
Juliette Alimena: Of course, we hear about the the the whole rest of the fcc physics program during the the rest of this workshop, so I won't go in into that.
Juliette Alimena: But I wanted to
Juliette Alimena: give a little bit of special mention to long live particles, because because they've been less addressed historically. So just to to say quickly that
Juliette Alimena: particles in the standard model span a wide range of lifetimes from really particles with really short lifetimes, like the zebos on top.
Juliette Alimena: Top quark all the way up to particles that we assume to be stable like like the proton.
Juliette Alimena: So then, it stands to to reason that beyond the standard model, new phenomena should have a wide range of lifetimes, it as well. But con conventional searches, for example, now at the Lhc. Are usually for for promptly decaying particles with a Ct.
Juliette Alimena: Speed of light times, the the lifetime of orders of millimeters, or or or less so, in addition to promptly became particles. We also need to look for new particles with with long lifetimes.
Juliette Alimena: And there's a a variety of types of searches you can do for long, live particles. You can look for the long live particle itself, or you can look for it's displaced decays within within the detector
Juliette Alimena: and
Juliette Alimena: So we've been doing this now for for a while, and at the Lhc. At least, the the main detectors and triggers and offline reconstruction aren't really designed for for this type of signature for example, a displaced decay. So there's actually a real big opportunity to do something different. For for these types of searches in particular, at the Fcc. In in so so much that we can design these general purpose detectors with with long particles in mind from the get go
Juliette Alimena: so just to to say that there's been a lot of work that's gone on in the Bsm group. And in particular, in the context of long move particles. There's been a number of
Juliette Alimena: students working master students working on long live particles. Many of the theses are done done or in in progress. And for for snow mass. We had a loi as well as a white paper on long move particles.
Juliette Alimena: I'd say. In general, the Bsm group is focusing on 3 physics cases, heavy neutral leptons, or or H and l's actually on like particles, or or Alps and beyond the standard model Higgs. So what I was gonna do in in the stock is to give you an overview of what's going on in the the Bsm. Fcc group and touch upon each of these physics cases. While doing so.
Juliette Alimena: But in in general, our our workflow is to to use the sort of official analysis, tools and framework developed for the the Fcc. So this is the Fcc analysis software that are which we use to to analyze centrally produce. Edm 4 hep samples. Usually with the idea detector and Delphi's, although some signal samples have been produced privately. And
Juliette Alimena: you know, along with the official tools. We've developed a dedicated tutorial for long live particle studies in in particular. So people can build off of that as well.
Juliette Alimena: I think in general in the group, we're trying to be as realistic as possible and uses you know, high high statistics, background samples and and and move away from more generator level only studies and try to get to realistic models of the detector.
Juliette Alimena: Okay, so let me jump into the the first physics case, which is heavy, neutral leptons, so, as you probably know, h and l's are Dirac or Miranda, sterile Neutrinos, with very small mixing with the active neutrinos, and they are interesting because they could provide answers to some open questions of the standard model, like, why neutrinos have masses, the variant anti-variant asymmetry and and dark matter.
Juliette Alimena: And in particular, if you're thinking about long lived, heavy neutral leptons, those can occur when the coupling and and masses are are small. And this is a plot that we produced on heavy neutral leptons, showing the the reach of the the Fcc. At the Terra z run
Juliette Alimena: we produce this for for snow mask. So in the next slides I'll go into briefly giving you an an introduction to the different studies that are going on in in the, in the context of heavy neutral leptons. But one thing that I won't mention is that we are actually also, there's also a group setting H and Ls in the cld design.
Juliette Alimena: So you can fair follow up with Jeremy with Jeremy and Gail, if you're interested in that.
Juliette Alimena: So first in the context of snow mess, we studied
Juliette Alimena: the the case where you have
Juliette Alimena: the z pole run, and then heavy neutral lepton is produced it in association with a regular neutrino, and then that h and l decays, and the final state is 2 electrons and a neutrino. So there's 2 diagrams that that will give you that
Juliette Alimena: with a in one case with an off shell W. Boson one with an off shell z boson
Juliette Alimena: and here. So this plot shows you sort of the the final results that we got in the context of of snow mass, and compares them with a theory prediction from from this this paper. So this
Juliette Alimena: the theory prediction was for all decay modes of the the h and l's.
Juliette Alimena: but the contours that you show heat we're showing here in blue and in yellow are just for the you know, this decay mode to including electrons. So it's not completely an apples to apples comparison. But it was basically, you know, a first start.
Juliette Alimena: Also around the time actually for for snow masses as well. We also studied
Juliette Alimena: how how we could distinguish between Dirac or Myurana flavors of of H and l's, so Dirac, h and l's would be Lnc. Only. But Myurana would be Lnc. And Ellen V. And this difference would give you different kinematic distributions. For example, you would get differences in the the lifetime of the the H. And L.
Juliette Alimena: So you can see the marijuana particles
Juliette Alimena: our solid lines and direct our dotted lines, and so you can compare them for for 3 different mass points with a fixed value of the the coupling. So you see the differences in these distributions. There would also be differences in the opening angle between the 2 electrons in the the final site, or sorry the electron positron in the the final state.
Juliette Alimena: So these plots show you that the the cosine of that angle at the Gen level and at the reconstructed level. And again, if you compare the solid lines with the dotted lines, you get the difference between Myurana and and Dirac particles.
Juliette Alimena: So in addition to to that we've moved on are also setting other final states. For example, when the heavy nature Lepton decays and gives you an electron, and then the the W. Boson decays to to 2 quarts. So it's the EJ final.
Juliette Alimena: So what what we've done is to to first perform a cut and count study, and then in parallel produce a study using a Bdt, so this is gx boost with with Tmva.
Juliette Alimena: And this plot on on the right shows you the difference in in the results with these 2 methods. So the cut and count 2 sigma
Juliette Alimena: 2 sigma band is shown in the the red line, and you can see the improvement that you get in the pink line when you use the the Bdt, so I think this was really great to see. This is the first use of machine learning in long live particles at the Fcc. In in Fcc Group that I that I've seen, and you see the the nice improvement in the limits, especially here at high H and L. Mass.
Juliette Alimena: And this is is just the beginning of this study there's more to to come here. So the work the the office are working on adding, adding discriminating variables to to the Bdt. Or instead of a Bdt using a deep neural network.
Juliette Alimena: And one thing they also need is better Monte Carlo statistics. So that's the the feature of this study. We also have a study where the h and l is now decaying to the mute Jj. Final state, so as as shown in this fine fireman diagram here.
Juliette Alimena: And so this is. This is nice, because this analysis is targeting 2 different regions, one where you have a prompt decay of the the H. And L. And this is particularly relevant at high mass, for example, basically H and L. Mass greater than about 50 gv.
Juliette Alimena: and the second analysis, studies when the the h and l is long lived, and this is more relevant for for for low mass and there's an explicit requirement to to make the the muon, and this the final state displaced.
Juliette Alimena: and the the plot on the right shows you a you know, basically kind of quick study to to show you the complementarity between these different cases. So the the red line shows you when you have a the results when you have a prompt decay and the black and the blue line show you 2 different
Juliette Alimena: scenarios for for long live decays, and you see how they can nicely be complementary, complementary, and cover a wide range of the of the the phase space, and the the coupling mass plane.
Juliette Alimena: So for for this study, these are the the results in the the prompt prompt sort of sub-analysis and in the the long lived. Analysis. So you can see that we're ruling out large areas of the the phase space.
Juliette Alimena: Right?
Juliette Alimena: So then let me move on to the second physics case talking about axing like particles. So these are pseudoscalars and models with spontaneously broken global symmetries that can be weakly coupled to the the dark sector, and in particular you can get long lives, the Alps, when the the couplings and and mass are small.
Juliette Alimena: and you can see that F, the the Fcc. Which is shown it in pink here that orders of magnitude, of parameter space are are accessible, and it would be particularly interesting to to look at final states with at least 1 one photon
Juliette Alimena: and in particular, recently, there's been a search or a a study done for looking for Alps. That are produced in in e plus e minus collisions and
Juliette Alimena: via photon fusion. So you get 2 photons coming in and producing the Alp, then decay to to 2 photons.
Juliette Alimena: So the irreducible background in this case is the the light by light continuum and this study is put out in this this paper and for now is only using Delphis so sort of a standalone Delphis, but not yet the for the the full. Edm. 4 hep, and fcc analysis machinery.
Juliette Alimena: What you can see is a plot on the the left, showing one of the the discriminating variables. So you can see the the light by light background is fairly flat, and over the full range of a 5 gamma gamma.
Juliette Alimena: whereas the the different signal samples are
Juliette Alimena: push more and more towards Val like values of one. And the results are shown in the coupling mass plane on on the right. So the the different outs photon fusion via photon fusion I've shown in the different colors here. Blue sorry, purple, green, red, and red and blue for different
Juliette Alimena: For different energies. And you compare that with yellow, the the part in in yellow that shows the case where a photon is produced in association with the with the Alp, and that can can target lower masses.
Juliette Alimena: Right? And if this is interesting. You can see Patricia's talk in the parallel session for for more on this study.
Juliette Alimena: And then the third physics case. So here. The third case that I would say that we're covering in the Bsm group is bsm, Higgs, and in particular, first, I'll start with exotic Higgs decays to to to long live particles. So in particular, Higgs, Bosons, the standard model Higgs Bosons could undergo exotic decays to scalars that could be long lived.
Juliette Alimena: Basically, a new scalar could be a port portal between the standard model and the HAHM. Dark sector
Juliette Alimena: and for a sufficiently small mixing of a scalar can can be long lived. So this study is targeting the
Juliette Alimena: zh stage. So 240 Gv collision energy and what you get is e plus e-mail is going to
Juliette Alimena: giving you a Z and a Higgs boson, and the Higgs the case to to these long live scalars and gives you 4 B's in the final state, and the Z will give you 2 electrons or or 2 muons, and that I mean, this is the case that's being studied. So basically at the in the experimental signature would be 2 displaced vertices coming from these display speed jets
Juliette Alimena: and zebos on that you can tag with. The ee miu and invariant mass, for example.
Juliette Alimena: Oh, and this this study that I'm describing here, and then the next slide or 2 is in Magda's master's master master's thesis, and also there's an Fcc. Node on this on on Cvs.
Juliette Alimena: So there's 2 studies that they've done here, one at the generator level and one at the Reconstruction level. So first for the generated level, selecting events with at least one scalar within the the acceptance region of the the idea detector, basically. And they're requiring that all the signal points have at least 4 events. Except for the shortest, the longest lifetimes probe. So this table shows you the different, the sensitivity
Juliette Alimena: for different masses and and mixing angles, and you, and at the bottom the right side of the table, you get the expected number of selected events for for each of these scenarios.
Juliette Alimena: So, in addition to the Gen level study there also for working on a rico level study. So here, you select events. With the Z boson, and at least 2 displaced vertices, and the Z boson you tag by getting 2 oppositely charged electrons or muons within the invariant mass range corresponding to the Z boson.
Juliette Alimena: and the displaced vertex is characterized by by finding a displaced vertex in the tracker volume, but not in the most inner innermost region of of the the tracker in order to reduce background.
Juliette Alimena: And the mass of that vertex must be greater than one Gv. So again, you can see the sensitivity here for the different you can see the you know the number of events that you get for each of the background samples.
Juliette Alimena: And after all, cuts, it's the far right column. So basically 0 events in background. Given the statistics that are available at the moment as compared with the different signal points. A. Again. The the far right column shows you after all, the the cuts are applied. So this gives you an idea of the the statistics or the sensitivity of this search.
Juliette Alimena: So clearly, we need more background statistics to to draw more conclusions, and the the analysis of the winter 2023 samples are in progress, and they're also working on updating some some choices in in the the signal model.
Juliette Alimena: And the the plan for for this study is paper, and I, refer you to Magda's talk in the parallel session for for more on on this analysis.
Juliette Alimena: the last study that I wanted to very briefly. Cover is an inert to Hdm, scalar pair production, scenario. This is a first look at this. At this study
Juliette Alimena: and basically, in this 2 Higgs doublet model, you're adding a Z 2 symmetry to the 2 hdm, and these are the
Juliette Alimena: Simon diagrams that are considered in in this search. So you get 2 Leptons and 2 Higgs bosons, and in the final state, or the same thing plus some some neutrinos.
Juliette Alimena: So this study, uses 20 benchmark mark points that are relevant for the Fcc. That's come comes from from this this this paper here?
Juliette Alimena: And it targets the the Z stage and is using the the winter 2023 samples. So this is a first first. But they did was to reproduce that a click study click, a code and count study that was done. And they achieved similar yields, as you can see from this table here
Juliette Alimena: and then on top of that they added a new Bdt selection particularly designed for the Fcc. And they're they're getting a good significance at the detector level and working on the the limits now and the plan is also to investigate the Fcc. Hh. For for this this study as well.
Juliette Alimena: Okay, so with that, I will start to to to wrap up so just to to say that we have regular meetings. Particularly in the the lop group within Bsm, fcc.
Juliette Alimena: so the meeting category is here, and there's a couple of mailing lists feel free to to join them and and join us in general, if you're if you're interested.
Juliette Alimena: and I point to you to the list of other talks on on psm, studies that are happening th this this week at at Annesi, and so just to to quickly
Juliette Alimena: sum up so circular Higgs factory, like the Fcc. Ee, has a rich physics potential and allows us access to direct and indirect searches for for new physics. As many interesting signals we can explore like heavy neutral leptons, hidden sectors, accident like particles, and exact higgs decays.
Juliette Alimena: And the other thing I wanted to make sure to emphasize is that we have the opportunity to design detectors and algorithms with long with particles in mind already from the the get go for the Fcc. So plenty of phase space to explore in the future. And let's make sure that we don't miss direct searches for for new physics. Thanks.
Juliette Alimena: Okay, I think it was maybe a little long. Still. I have 20 min.
Magdalena Vande Voorde: Yeah. You clocked in on 22 min.
Magdalena Vande Voorde: Okay? I mean, you will probably talk faster when it's time for giving it to or so.
Juliette Alimena: Okay, maybe I thought I was already kind of talking fast.
Magdalena Vande Voorde: No, no, I just meant in general, that when you're actually on stage, you have it like, or at least I have maybe not you a tendency to talk faster and or skip details, and so on. So usually becomes shorter.
Juliette Alimena: Yeah, I already skipped some details. I think I should remove some some information on the slides.
Juliette Alimena: But okay, thanks a lot for for timing it back to do people have general comments for me, which then we can go, maybe quickly. Slide by slide if you like.
and
Juliette Alimena: Anna
Anna Sfyrla: Hi, oh, wait a second, because I have 2 windows open.
Juliette Alimena: can you hear me? Yes.
Anna Sfyrla: okay, good. So very nice talk Juliet. Very, very nice. I just have 3 general comments.
Anna Sfyrla: and then, unfortunately, I will need to disconnect because I have another meeting. So the first one was that so when are you? Because the the talk is about Bsm, and then you talk a lot about Llps.
Anna Sfyrla: but in reality. The talk is about simply interacting particles. Right? I mean, it's not Covid. I mean, it's not about whatever can be done in Bsm on Fcc, because it doesn't talk about. I don't know. Be physics. This kind of things.
Anna Sfyrla: and it also is not like dedicated to Llps alone. So it's it's about Phipps, and you know, Phips have the
Anna Sfyrla: characteristic of being also lips depending on the part of the face base. And that's what the talk over. So maybe it could be a little bit more explained at the beginning. For example, on slide Number 9, where you are presenting, let's say, the thesis that we are done so far.
Anna Sfyrla: You call them Llp. De Theses, but, for instance, have the basically nothing on Llp's inside. So it is more, you know, like the
Anna Sfyrla: Fips exploration, I guess on Fcc.
Anna Sfyrla: I maybe you could also emphasize that Fcc will be a unique machine to explore these Phips because of the nature of being weekly interacting, etc. We can't expect on HH kind of particles as they are so difficult to explore now on the late say, for example, so.
Anna Sfyrla: yeah.
Anna Sfyrla: And then the third point is that
Anna Sfyrla: yeah. You said that some points are, tell lps have low attention, or like they're not well covered. And maybe by now this is like, not really true, because I mean, we given a lot of emphasis on this.
Anna Sfyrla: also on Hi, you me! And you know yourself, that are all this exciting experiments being proposed, and some of them are already running. So so maybe it is like more that Fcc is going to be really their machine to maybe give given the huge amount of statistics in very clean environments give really the ultimate
Anna Sfyrla: answer to this, because, for instance, for channels, we are really reaching to the bottom of where we can have sensitivity, basically.
So maybe these are things that could be.
Anna Sfyrla: Put it out a bit more.
Juliette Alimena: Yeah, indeed. As I was saying it, I was like, No, it's really great. And then I have just a couple of more specific ones that I will send you via Skype or something.
Anna Sfyrla: Thanks. And I have to go now. Unfortunately, bye.
Juliette Alimena: Okay, then we can quickly go to to to see if there's other general comments for me
Giacomo Polesello: genetically. If you are short on time, I think we are.
Giacomo Polesello: Yeah, a bit beyond what we did in a bit beyond the
Giacomo Polesello: snow. Massive stuff we have had a it's a start being a bit on the outside. And II see you, I putting quite a few slides on that. And I think this could be
Giacomo Polesello: actually cut because we we have a
Giacomo Polesello: quite, quite some new material. In a sense, this is kind of semi-super seated by by the work of
Giacomo Polesello: the recent
Giacomo Polesello: Geneva work. Yeah, indeed, I think I would. At least remove this slide. It, you know, since I'm still 2 min over, maybe I should remove this slide. 12
Juliette Alimena: at least next slide 12.
Juliette Alimena: And I think
Juliette Alimena: some version of this slide is still nice to no, no, Madi, this is me. There is more more recent work than that than
Giacomo Polesello: there's no much for that. Yeah, it has been presented. Quite a. I don't know if this is the most recent to you. Well.
Pantelis Kontaxakis: yeah, I think it's the most recent in terms of
Giacomo Polesello: okay.
Juliette Alimena: Then I probably was just wrong to to mention snow mass, when I presented this slide. Okay.
Juliette Alimena: sorry I will. I was gonna keep going. But I
Juliette Alimena: just to to check.
Juliette Alimena: II was just checking for other slides from from snow Mass. And I think everything else is updated and past no mess, so
Giacomo Polesello: I would just remove slide 12 at this point. But there's nothing more than you. So
Juliette Alimena: sorry. Say, say again, a a LA lp is a there's nothing new. So it's okay. We don't have new stuff.
Juliette Alimena: Okay? The other thing maybe is, I,
Juliette Alimena: would have liked in principle to mention the the neutrino oscillations stuff that that the group is that you all are working on. But I feel like I don't have the time. And anyhow, there's dedicated talks on it. So is it? Okay? Yeah, no, it's perfect. Okay, yeah. You could put the could put the license
Giacomo Polesello: kind of how? How do you say? A at the end of the heavy neutrino jet? Oh, yes, exactly. But also I
Giacomo Polesello: small in the h end slides. Moo Moo, jj, say, there's also the the
Giacomo Polesello: she also talk by the activities. Since here this is a, this is a pretty old version of the analysis, actually.
Giacomo Polesello: And they they. Yeah, this is the basically some. We actually know the analysis
Giacomo Polesello: and Pico today did
Giacomo Polesello: the pomp and non prompt are separated actually now by by a cut on the primary and the position of the primary vertex. I don't know if
Giacomo Polesello: I got. I think I got the latest plots, but I think. Probably the text needs to be updated. Okay, it probably would be nice. Actually, instead of having a day.
Giacomo Polesello: they plot the theory plot. Also, we have the final plot.
Giacomo Polesello: the one with with all the results.
Giacomo Polesello: Okay, can you point me to exactly which one? So I'm make sure not to screw it up? Yeah, it's let me. I just sent it
Giacomo Polesello: to you, to you. The thing is so I should be able to.
Giacomo Polesello: I should be able to to tell you which which figure is it?
Giacomo Polesello: Yeah, it's a it's it's in the North, in the north is the which I sent you is the
Giacomo Polesello: his service.
Giacomo Polesello: It's figure 26. Okay, great. Thank you.
Juliette Alimena: I'll get that. Thanks.
Juliette Alimena: Okay,
Juliette Alimena: other comments in general.
And so.
Juliette Alimena: okay, I think we don't have a ton of time, so maybe I can quickly go through
Juliette Alimena: so my intro slides. I just wanted to sort of set the stage a bit. Any comments. Maybe I can ask you if there's any comments and slides what?
Giacomo Polesello: 2, 3, 4. Yeah, this. Yeah, it's like 2. If yes, if you have short of time of course is like took and given, the environment again.
Giacomo Polesello: can be skipped and to some extent. It depends
Juliette Alimena: okay.
Giacomo Polesello: since this is not a high chip where you have a. you have Fcc people so few.
Giacomo Polesello: Yeah, yeah.
Giacomo Polesello: indeed, maybe I can. Yeah. The first 3 you can compact to them a bit more. This is, this is, they are very beautiful slides. And but
Giacomo Polesello: the environment probably is, needs to be less introduction or how nice it is having an Fcc.
Juliette Alimena: Okay? Sure.
Giacomo Polesello: none is useful, because it's where we compare.
Juliette Alimena: Yeah.
Juliette Alimena: Okay. I tried to go through lps quickly, but I thought it was useful to mention
Giacomo Polesello: yes.
Giacomo Polesello: and the prompt, because the factor that
Giacomo Polesello: the fact that we we have a huge statistics
Giacomo Polesello: and an electronic thing. And we can beat. We can beat Elitzi also for prompt, for quite a few pomp signatures.
Giacomo Polesello: Alps and a china. Clearly we we can do can do better for so okay?
Juliette Alimena: And here I will change things.
Magdalena Vande Voorde: Oh, I just see one thing now. Axel is not a master student oops. and
Magdalena Vande Voorde: but yet he will be working enough to see. But as part of his Ph. D.
Juliette Alimena: Okay.
Juliette Alimena: And he didn't do his. His master's
Magdalena Vande Voorde: at at. Okay, then I think I will
Juliette Alimena: slide 9.
Juliette Alimena: Okay.
Juliette Alimena: everyone else, I'm sure. Okay.
Giacomo Polesello: think this slide is okay. Just kinda I go through it fast.
Juliette Alimena: I think I can move some details here.
Juliette Alimena: Oh, and since I mentioned.
Giacomo Polesello: yeah, no, that's perfect. I think this is a perfect way.
Juliette Alimena: Yeah. But at the same time that I mentioned the the Cld study, I can also mention the neutrino oscillations and say, Here, here's a here's 2 talks on it.
Giacomo Polesello: but they they will give a talk on this.
Juliette Alimena: No, no, sorry there there will be in the the parallel sessions
Juliette Alimena: So Nicola's talk, and also Jan's talk, I think more from I was wondering if they also were giving talk.
Giacomo Polesello: No, no, no. Okay.
Juliette Alimena: Where we're here.
Giacomo Polesello: Yeah. Okay.
Giacomo Polesello: yeah. And also because these are the the plot on their it. Yeah, which is the theory plot today. The plot I figure 26.2 is the virtual now with experimental curves for us. So it's kind of
Juliette Alimena: okay. Great thanks.
Juliette Alimena: I'll remove the slide.
Pantelis Kontaxakis: Sorry. Just the comment on this slide. Probably you can just add the another bullet point that you can say that we utilize matrix. So, for example, symmetries or Ankara distributions, where they let the number violation make
Pantelis Kontaxakis: so it can be identified, or something like this.
Pantelis Kontaxakis: I think. I'm not sure if you agree with it. But I think it is important to.
Pantelis Kontaxakis: you know. Just mention it.
Pantelis Kontaxakis: And also we have a, actually, we have some
Pantelis Kontaxakis: a new newer plots compared to the webinar beat, reproduce some plots.
Pantelis Kontaxakis: So probably you. I don't think that this would be a huge defense, but you can test. Use the one you know, some
Pantelis Kontaxakis: representative plots from the meeting seizes or something. But if you leave it as it is, it's okay for us
Pantelis Kontaxakis: just saying.
Juliette Alimena: Okay, sure, no, I can use Dmitri's plots, and I'll add, and I should at least add his name to the slide. I think it's nice to keep to keep Tanisha's name.
Pantelis Kontaxakis: Yeah, for sure.
Pantelis Kontaxakis: if you have any, it could be good to add.
Juliette Alimena: Okay, great thanks. Emory.
Anne-Marie: Hi, yes, thanks for including our analysis on the under 2. Hdm, just maybe. Do you want to put instead of the right plot with the significance?
Anne-Marie: Do you want to put the shape of the discriminants. I could make the I could make the plot nicer with with the Fcc analysis software.
Juliette Alimena: Oh, okay, sure is that. Is that. Okay.
Anne-Marie: maybe just with with the maybe. So, either. II mean you. You can say as well if you prefer to show the Bdt with the signal and background. So we see the discrimination in shape, or another valuable
Anne-Marie: they were even viable. You, you tell me.
Juliette Alimena: I think both are are interesting. So whichever one you'd prefer to to sort of highlight.
Anne-Marie: Okay, okay. So I will make a couple and send them to you.
Anne-Marie: That'd be great. I don't know.
Anne-Marie: Okay, thank you. Thanks.
Juliette Alimena: Okay.
Juliette Alimena: So maybe. Then we go to slide 14. If there's comments on on this.
Juliette Alimena: it seems fine for me cool.
Juliette Alimena: We already talked about this slide and the next one, I think.
Juliette Alimena: okay, I'm gonna remove some details from the slide. But still Co, keep it to to introduce axion like particles.
Juliette Alimena: and then highlight. Patricia's
Juliette Alimena: recent study.
Juliette Alimena: I don't see her connected. So presumably okay.
Juliette Alimena: And then go into exotic gigs
Juliette Alimena: again. I was kind of fast, but let me know if there's anything I should change. Magda, for example.
Magdalena Vande Voorde: I think it looks good. I mean, it's the old numbers. But the way I put my presentation I'm represent like improv presenting the new plots and new numbers, for, like how many events we have after the final selection. So and this is. But this is fine, like, it's a summary of the notes. So
Magdalena Vande Voorde: I guess that's good.
Juliette Alimena: No, that's okay. I I'll I'll oh.
Juliette Alimena: sorry Amory left. Ii think I think it's best if I show sort of the latest and greatest. So can you point me to where I should copy from instead? Yes, I'll send you, and I also need to check with my Oopsala people if they approve, and so on and so forth. But okay, these are very fresh results. No wonder. Okay.
Magdalena Vande Voorde: but I'll send you as soon as I have it done.
Juliette Alimena: And
Giacomo Polesello: okay. actually, regarding these these analysis, I see that you you are putting it. That is said as a a note in Cds. But I suppose it's not creakable, because
Giacomo Polesello: it's it's it's public!
Juliette Alimena: We we have. We have one because we have one also for the heavy neutrino, which is also Cds, but I still me, miss, is fo final approval, as as this note does actually.
Juliette Alimena: Okay, indeed, it says, please log in to access this page, and I don't see where I'm allowed to. Okay.
Juliette Alimena: So then, indeed, instead of this this link, why don't I say both here and for the mute Jj, study that you know a Fcc. Note. I don't know. How should I?
Juliette Alimena: how should I write it in Cds or in progress.
Giacomo Polesello: No, fcc, not, let's say, for under approval or something like that. Yeah.
Juliette Alimena: you see, now, it's under approval.
Giacomo Polesello: Actually you I. Another thing which I don't know if it's public is if it meet, if there is the midterm document. Otherwise you could refer to it as well.
Giacomo Polesello: because there there is a significant Bsn contribution, including, yeah, including the work of Magda and the work of Nicola and myself. So
Juliette Alimena: yeah, that's a good point.
Magdalena Vande Voorde: I haven't seen it being public, actually.
Giacomo Polesello: But you should mention that we yeah at at the beginning way you you say that this, this work has contributed that to the taking into the midterm document.
Juliette Alimena: Yeah, indeed, I think I should write that on slide 9.
Juliette Alimena: Okay, cool.
Juliette Alimena: Okay?
Juliette Alimena: Then anything in the closing slides.
Giacomo Polesello: Well, there is also talk by myself about measuring the heavy neutrino with timing, which it's well, which is more, I take it's more about timing where David is is the example the benchmark I use. But
Juliette Alimena: okay, I think I've got the link to to your talk here.
Juliette Alimena: Okay? Great
Juliette Alimena: a. Any last comments. Otherwise I think we should probably move on to practicing Magda's talk. I hope people have a
Juliette Alimena: at least a few people have time to stay.
Juliette Alimena: Excellent talk. I don't know yet, but eventually it will be okay. So it was very great. Thank you.
Juliette Alimena: Okay.
Juliette Alimena: thanks. Okay. So, Magda, do you want to share your slides? And I can time. You also have 20 min. Right? Yeah, I have 20 min. But I was thinking of like not practicing to talk. Now, just flip through the slides. If that's okay. Cause I'm a bit short of time afterwards, and I still maybe will rearrange my slides if you have input. On it.
Magdalena Vande Voorde: Okay, sure, I'll just tell you how I think I will present it, and then
Magdalena Vande Voorde: we'll see them. Let's see.
Magdalena Vande Voorde: Okay. Can you see my slides?
Magdalena Vande Voorde: Yes, perfect.
Magdalena Vande Voorde: So my talk has been moved from like a peril. Bsm. Session to the Peril Higg. Session after your talk, Juliet, and I thought I was like
Magdalena Vande Voorde: thinking of starting with introducing with lops are. Maybe it's a bit of a overflow with information.
Magdalena Vande Voorde: Select lps, and then why search for them.
Magdalena Vande Voorde: and how it's done at Collider. So it's quite an overlap
Magdalena Vande Voorde: with what you're doing. But I thought it was kind of a good introduction for Hicks people, in case they're there.
Juliette Alimena: Yeah. Hmm! I could see it going either way.
Juliette Alimena: Let's let's see if you have if you have too much material, in which case, I mean, if you find you've got your you practice the talk, and it's too long. Then you can maybe reduce part of part part of this, but you will present it in a different way than me. And you know, Higgs, people in, indeed, wouldn't necessarily know it. So
Magdalena Vande Voorde: I would say you could probably keep it to first order. Yeah, nice. I aim for. I've done 15 slides, so I think hopefully, I will end up at 15 min, and then there's some time for questions as well towards
Magdalena Vande Voorde: but key some introductions to Yellow Piece, and why we should search for them.
Magdalena Vande Voorde: how it's done at Collider. So the kind of different signatures presenting here similar figure, that you have the benefits and some challenges.
Magdalena Vande Voorde: Why Fcc offers good opportunities for searching for all of these
Magdalena Vande Voorde: in general, then I move on to kind of present. How we get long lived articles from exotic hits. The case in particular. Long live scalers! So the
Magdalena Vande Voorde: model we're using how it's motivated by this, and like so in dark matter with the dark sector here. and Jalal grandeur looks like
Magdalena Vande Voorde: introducing the mixing angle
Magdalena Vande Voorde: and the partial width
Magdalena Vande Voorde: to see how we get along with signature to my earlier presentations. Moving on to the specific case of Fcc ee. So
Magdalena Vande Voorde: the kind of process we're targeting and that the Set age stage is relevant. Maybe I'll include
Magdalena Vande Voorde: the energy here.
Juliette Alimena: Yeah, either way.
Magdalena Vande Voorde: And the experimental signature.
Magdalena Vande Voorde: And then how we did with the simulation. So using the full chain. And now, as I put my presentation, now, I'm presenting the latest. So doing, the signal simulation with the winter. 2023 ideal Delves card
Magdalena Vande Voorde: which is a date from what's in the note and what was in my thesis.
Magdalena Vande Voorde: and we'll see if I'll keep it this way and present these plots, or if I'll more, do a summary of the note, and then, just in the end ad that we're working with an update. With the winter. 23 none of the obsolesa people are could come today so get their input as well
Magdalena Vande Voorde: like, I'll send the slides to them. Yes. Similar picture that you had
Magdalena Vande Voorde: but also link to analysis code for exotic case, and where we have the samples more of a workshop in case people want to look into it in more detail afterwards.
Magdalena Vande Voorde: this is just specifications about the signal. So in particular, I will beautify this slide. But yeah, the parameters we're looking at. So the 2 ends of the mass spectrum
Magdalena Vande Voorde: and a different mixing angles and then the new Kappa value
Magdalena Vande Voorde: just introduction, and then a plot of the generated time distributions for the samples
Magdalena Vande Voorde: usually like how I had it before I had 2 plots of one separated for each mass points, or 20 J. V's in one plot and then 60 J. V's in another.
Magdalena Vande Voorde: Now I put them in the same. But I was thinking, is it clear that you kind of see this statement, that lifetime increases for smaller mixing angles and smaller masses? Would it be more clear to put it into plots?
Magdalena Vande Voorde: If you have any opinion.
Juliette Alimena: I don't.
Juliette Alimena: who others?
Magdalena Vande Voorde: Okay, then I will think about it. Maybe see what Rebecca thanks, and Yulia
Magdalena Vande Voorde: sounds good.
Magdalena Vande Voorde: And so there was a generally lifetime distribution going on describing a bit about the DV reconstruction, how it did it
Magdalena Vande Voorde: with links to the appropriate and references.
Magdalena Vande Voorde: and nothing new. and then plots. How the
Magdalena Vande Voorde: generated killings looks like, and then what we get from the reconstructed
Magdalena Vande Voorde: and Dvds. So one thing I've noticed
Magdalena Vande Voorde: in this plot is that we have 2 times the amount of reconstructed Tvs.
Magdalena Vande Voorde: This was not the case in spring. 2021
Magdalena Vande Voorde: samples not fully sure what's going on. If I'm accidentally plotting. Not like if I'm plotting it twice per event. But I'm not sure as I need to look it up
Magdalena Vande Voorde: scale. But
Juliette Alimena: quick question is before selection. Is that accurate?
Magdalena Vande Voorde: Yeah, okay.
Magdalena Vande Voorde: Should be. Yes.
Magdalena Vande Voorde: So no selection at all applied here.
Juliette Alimena: Okay.
Magdalena Vande Voorde: and then here move on to the event selection.
Magdalena Vande Voorde: So, selecting events with a set bows on at least 2 Dvs summarized here in this table
Magdalena Vande Voorde: as well as the vertex selections, and why we require the different distances of the Dvs and charge invariant mass.
Magdalena Vande Voorde: So you're jumping right into the Rico level study.
Juliette Alimena: Were you going to present the gen, gen, level study? Okay.
Magdalena Vande Voorde: I didn't think so.
Juliette Alimena: Okay.
Magdalena Vande Voorde: and
Magdalena Vande Voorde: this is the new numbers with the reconstructed events for the signal. Only
Magdalena Vande Voorde: not the tables.
Pantelis Kontaxakis: One question on the previous slide, if I may.
Pantelis Kontaxakis: Here you're saying on the bottom, right. You you have to update another plot. I didn't understand, or you have to replace the plot that you have.
Magdalena Vande Voorde: I need to replace it. So I have a new plot. But then I have all the samples plotted.
Magdalena Vande Voorde: But it's the same right environment. Yeah, it looks exactly the same. It's just to be like, fully correct. Yeah. Sorry no worries. It's nice.
Magdalena Vande Voorde: yes, sensitivity analysis. So this is the new type of table. One odd thing is that we actually have more events after the final selection now compared to when we did it with the spring. 2021 card
Magdalena Vande Voorde: and we should expect a bit less because cap by smaller. However, there's a lot of changes.
Magdalena Vande Voorde: not only winter 2023, but at the C analysis replace the vertex reconstruction. and I moved from
Magdalena Vande Voorde: working with the cross sections to working with the number of events
Magdalena Vande Voorde: when I normalize to get this event.
Magdalena Vande Voorde: But this is
Magdalena Vande Voorde: perhaps more of a question for Julia. Okay, yeah. I think if I were you, I would sort of
Juliette Alimena: check sort of each of these changes when they go in in the, in the cut flow, and see if it if the the change there makes sense. You know what I mean, because to sort of factorize all of these changes and not just look at the final number.
Magdalena Vande Voorde: Yeah, I saw that we're actually keeping. We have more events after the pre selection now than we had before. and the preselection is just requiring 2 oppositely charge laptops.
Juliette Alimena: okay, yeah, I think I if I were you, I would look at those distributions of, you know, number of Leptons, and see.
Juliette Alimena: you know from the the old version and the new version, and see what changed.
Magdalena Vande Voorde: Yes.
Juliette Alimena: okay.
Magdalena Vande Voorde: the and then moving on to
Magdalena Vande Voorde: take the background studies with some
Magdalena Vande Voorde: updates from excel. So here's one plot. Let's see if we get another one with all the selections applied until next week. and but for now just mentioning that we have moved on to 2023, where we have more statistics, and also can work with exclusive the case
Magdalena Vande Voorde: and some examples of the processes that we're looking at.
Magdalena Vande Voorde: And then a summary.
Juliette Alimena: Okay? But sorry the previous slide.
Juliette Alimena: Essentially, this plot is input to the results you showed on the slide on Slide 13, I guess right? So maybe you want to put it sort of more in order like before this, this slide, which is kind of your results.
Magdalena Vande Voorde: Okay, yeah, I don't mention the background here. And this is background. But yeah, usually it goes before this sensitivity analysis.
Juliette Alimena: Okay. well, I think, basically, you have a couple of things you need to
Juliette Alimena: to agree on within your group of what exactly you will show, and and then it will be smoother.
Magdalena Vande Voorde: Yep.
Juliette Alimena: yeah.
Juliette Alimena: But okay, nice.
Magdalena Vande Voorde: Yeah. Should I mention that Mark and Luis are incoming to join? Or is that? Just
Juliette Alimena: check with them if they're comfortable with you writing that because I'm not sure yet if they are doing their own studies sort of in parallel with you, or if they're really working with you, they're planning on working with you closely. Maybe you you have a better sense of it.
Magdalena Vande Voorde: Oh.
Magdalena Vande Voorde: yes.
Juliette Alimena: yeah, II would basically just check in with them.
Juliette Alimena: Okay, other comments for for Magda.
Juliette Alimena: But I think you have less slides that than I do. So you will probably make it in in closer to to 20 min. But if you practice, and you see that that you're running over, you know, you can probably condense the the first couple of slides like
Juliette Alimena: 2 through 4 or whatever they were.
Magdalena Vande Voorde: Yeah, thanks. That sounds good.
Juliette Alimena: Any other comments.
Juliette Alimena: I mean, not necessarily on Magnus talk, but in in general, in at least in preparation for for next week.
Juliette Alimena: Okay, well, then, I think that's about it. So thanks a lot, Magda, and everyone for connecting and giving us both comments
Juliette Alimena: and looking forward to seeing many of you next week.
Magdalena Vande Voorde: Thank you, Juliet.
Tom Critchley: Bye.