Juliette Alimena: Okay, great welcome. Everyone to the last Fcclp meeting of the year. I don't really have any news, because we've had a few meetings lately, and not much has changed. So if you want to see the latest look at the the last meeting, which was just a week ago, to to see my news.
Juliette Alimena: but in general, let me know if you want to give a presentation in January. You don't have to tell me, you know, even in the next weeks you could tell me in January.
Juliette Alimena: and maybe after the dust settles a week or 2 into January, maybe I should send around a poll and still see if this is the best time for everyone who is who's wanting to connect to to these meetings. Because I'm not sure it's it's ideal. But then, again, there won't be one time that that is, maybe people's schedules changes in the New Year.
Juliette Alimena: Okay, so any sort of general
Juliette Alimena: news or or comments, or should we jump into the meat of the meeting?
Juliette Alimena: Okay, I'm not hearing anything.
Juliette Alimena: so if not, then Gail, are you giving the talk?
Gaelle Sadowski: Yes.
Gaelle Sadowski: and yes, I think I will share my screen. Perfect.
Juliette Alimena: right? I'm sorry. 2 talks to today, one from Gail and one from Patricia. So you know, hopefully, we can split the meeting between these 2 topics.
Gaelle Sadowski: Can you see the slides?
Gaelle Sadowski: Yes, they're full screen. Okay.
so I will present you a studio of heavy natural lepton with a cld for stimulation.
Gaelle Sadowski: Objectives are to define different geometries and design options of vertex detector with. We are interested in tracking, bitexing, phototagging, and phone analysis.
Gaelle Sadowski: We choose full simulation to have more prestige results. And we use the CID detector.
Gaelle Sadowski: The CID tracker is made of a vertex detector with 3 table layers, pixel, and a full silicon tracker.
Gaelle Sadowski: There is several CID. Geometries. We are interested in these 2, the O. One b, 4, and the O. 2 v. 5.
The difference between them is about o, 2, v. 5. As a smaller and more realistic beam pipe and and adapted vertex architecture.
Gaelle Sadowski: But to define the current version of previous one or 2 v. 2, who was booked causing a very bad trucks. Reconstruction, so O. 2, p. 5 should be used instead.
Gaelle Sadowski: The precious talk we gave on the Channel with a full CD. Full simulation was done with this geometry.
and we do simply find
Gaelle Sadowski: a reconstruction issue with a 205. It is not corrected. But for this 2D. We use the O. One v. 4. Geometry.
Gaelle Sadowski: We are interested to study long-lift particles. We choose the avian neutral Lepton model because it has been studied in this paper. So we took the same model, and it will allow us for comparison
Gaelle Sadowski: with A. SIM
were generated with Mag. Graph and simulation, reconstruction with Cld. Full simulation with 50 K events. This is an example of file size from simulation and reconstruction, but this is highly dependent on in vertices, displacement and electron energy.
Verico Roico, Monte Carlo. Matching in Fcc. Analysis, is dedicated to fasting and does not work for full simulation. But it is quite easy to implement matching. And this is what we used
as selection. We want electron with minimum P tickets, exactly 2 opposite signs of the electron and a geometric environment mass incompatible with the zebra bosons.
Gaelle Sadowski: And we attempt to reconstruct vertex from electron pairs.
Yeah. this is a quantity distribution in blue. The generated distribution is in reducing distribution. And this of normalized distribution.
Gaelle Sadowski: The shape of reconstruction electrons, pretty much the general distribution while the normalization is lower. So we need to investigate the electron cross-section efficiency.
Gaelle Sadowski: And we have some simulation issues to do or simulate displaced vertexes. The assignment vertices were simulated, interaction points so not displaced.
We have tried with Fmc. 2 format with Mag. Graph. The simulation is compatible with Fnc. Free as Mcgrath is not into fast with fmc. Free the solution we generate ledc events with macgraphe, and then one teacher is tenderloin to produce atmc profile.
Gaelle Sadowski: But the simulation of displaced vertex requires statues. Code 2 from Vnl. While it is a statues, 2012 of feature. So we use a script to change by every state you're seeing at Mc free. And we were finally able to simulate displaced vertexes
also. This is the generate displacement of vertexes, and this is an example for 50 gvl. In blue, for generated displacement and in red for reconstruction, displacement and E of normalized displacements.
and we can see a drop of efficiency after 10 something later.
This is comparison. So top plots are still beautiful simulation and bottom plots. The idea of a scene
Gaelle Sadowski: we see difference in generated in Persian and also for generated data for channel.
Gaelle Sadowski: Maybe this is due to differences in Isa. Between Fussin and Hassim.
This is the geometric balance generated and reconstructed. They are similar except for reconstituted for fortitude. HTML. But this is the case with the largest displacement.
and this is the vertex displacement. So the first engine level is similar to a reconstructed level info simulation. And this is the reconstructed displacement.
Humphre simulation.
Gaelle Sadowski: And we can see a large deficit of tracks at a yeah displacement.
The tracking efficiency may drop as a fraction of displacement. The top plot is vertex would prove exposition for all reconstructive vertex.
So we can see a resolution and position.
Gaelle Sadowski: 40% is vertex between 20 and 40 microns.
This is a cut flow with B 0, no selection bin one, at least one electron and bin 2 exactly 2 opposite sign. Electron and we clearly see that the longer virtual channel did follow. The electron
Gaelle Sadowski: efficiency is
to sum up the method to generate additional events with correct displacement was implemented and tested.
Gaelle Sadowski: We did a reproduction of fast seam analysis. The generation much expect for infection and detail for
Gaelle Sadowski: 90 gnl. The next steps will be to study, displaced for expected reconstruction, efficiency to generate motional benchmark points and backgrounds and to study the impact of structural geometry on physics performance.
Thank you.
Juliette Alimena: Thanks. A lot. Gail.
Juliette Alimena: Okay, this is definitely quite interesting to see. I have some questions, but maybe others do. Alright also.
Juliette Alimena: are, are there questions
Juliette Alimena: more comments?
Juliette Alimena: Okay, maybe while people are thinking about them. Can you go back to slide? 7?
Juliette Alimena: yeah. So here for the reconstructed displacement, I feel like here is where things start to to go wrong, and everything else that you're seeing stems for from from that. So to me, this looks like the reconstruction is just not.
Juliette Alimena: I mean
Juliette Alimena: well, perhaps I can't tell from the middle plot. Is the like early bin are the early like the first bin
Juliette Alimena: does Monte Carlo and reconstruction match in the the middle plot. I can't tell where the first bin is.
Juliette Alimena: No, okay. So you're getting even much less reconstructed, like prompt, you know. Particles as well. So it's not good. Well.
Gaelle Sadowski: the efficiency for for
Juliette Alimena: you know, for for reconstructing electrons in general, somewhat regardless of displacement, but also definitely at higher displacements is not good.
Jeremy Andrea: if if I can comment on this.
Juliette Alimena: I'm I'm just speaking out loud. Yeah, yeah, for sure.
Jeremy Andrea: we tested also. Look at the like construction efficiency. Because it's easier to enter. But probably we should have. Look at the at some point. But
Jeremy Andrea: okay, in tative variant. The. indeed, the electron reconstruction efficiency is a little bit lowish.
I think, asking for 2 electrons gives you a
Jeremy Andrea: an event efficiency of 80%. 80, so it's not that high. It's not that low, neither for Pompeians. Ii think one has to look into the
Jeremy Andrea: and to the ponderous construction, because I am not sure there is a dedicated reconstruction for electrons there. While we know that that we need to account for
Jeremy Andrea: or Bremsstrahlung, and these sort of things. So it might not be
Jeremy Andrea: super optimal, but for sure does not explain the loss of efficiency. You see here as function of displacement.
Juliette Alimena: Yeah.
Juliette Alimena: yeah, to to me, it's clear that there's multiple problems
Juliette Alimena: like the the lack of reconstructing electrons, you know, regardless of displacement. And then on top of it at La. Large displacements as well. It's even worse.
Juliette Alimena: So yeah,
Juliette Alimena: maybe maybe we need to to show this to to Cldx experts or Ric Rico experts and see what they if they think this is actually at at least for the prompt electrons, if this is expected.
Jeremy Andrea: yeah. So we're in this question already with Andre and and learned about about this differences.
Jeremy Andrea: The, again, II think the pump electron efficiency is not that that that high. But it's not a catastrophe, neither. I mean 8, 90% passing an electron is is kind of kind of the low side. But it's it's it's manageable from then. And is this point of view for at least early tests?
Jeremy Andrea: Now, we
Jeremy Andrea: we tend to think that the the the tracking algorithm
Jeremy Andrea: is not well adapted for displaced. vertices! Because in the conformal tracking, actually, the tracks are assumed to come from the primary vertex.
Jeremy Andrea: This is one of the building block of of the conformal tracking, and then on top of that you can use a automaton to compensate for other stuff like like multiple scattering or whatever.
Jeremy Andrea: But even the feeding only
Jeremy Andrea: is is taken from, as I have understood so far. is, is, is using, using only the pixel, the vertex detector.
Jeremy Andrea: meaning that if you have a displaced vertex or long, this particular D case beyond
Jeremy Andrea: the vertex detector volume. You don't see it at all.
Jeremy Andrea: Which
Jeremy Andrea: which can explain? Why? Starting to? I don't know. 20 cm, 15 cm. You have no tax at all at the end. So
Jeremy Andrea: my my
Jeremy Andrea: feeling but to be checked is that it's attacking inefficiency for displaced
Jeremy Andrea: tax. And this is what we're trying to to understand right now.
Juliette Alimena: Okay, great.
Juliette Alimena: On the other hand, in looking at the right plot on here on Slide 7, you're getting a sharp drop off already at like 10 cm. So
Jeremy Andrea: yeah, actually, I don't know if a girl you have this in in backup. But you have a
Jeremy Andrea: you have the displaced distribution. Rico.
Jeremy Andrea: overlay the for all the benchmark masses. and
Juliette Alimena: and you you see, you see indeed, that at some point. So you get different shape. And then all the all, the the shape is similar for all the masses, because you don't request anything anymore.
Juliette Alimena: That's pretty clear
Gaelle Sadowski: which one
Gaelle Sadowski: this one?
Jeremy Andrea: Yeah. Actually, lyrico
Jeremy Andrea: the recover text. Poof, poof,
Jeremy Andrea: yeah. Yeah. A slide 12, for example.
Jeremy Andrea: not to. Okay. I don't have the right version of the slides so open. So the the sorry for that. The vertex of construction. Yes, this one.
Juliette Alimena: yeah.
Juliette Alimena: But at least in the log scale. It's small, a somewhat slow drop off rather than sharp.
Jeremy Andrea: Yes, actually, it depends on the of course, on the on the on the Dq length
Jeremy Andrea: for 19 Gv. For example, it's a it's a the IQ distribution, so to say. So there we are, construct most of the vertices, if if not all.
Jeremy Andrea: but then then you get the longer and longer displacement. And then at some point, the okay, given the set statistics, we have the the head and the and the black looks at the end, the
Jeremy Andrea: 2 other. So as long as
Jeremy Andrea: the the more the displacement is, the less the more inefficiency you you get. Yeah.
Jeremy Andrea: for sure.
Jeremy Andrea: But but then then I have a question also for for people who use the fast team. So
Jeremy Andrea: II
Jeremy Andrea: I should probably know why. I don't know. But the fast team does it? Does it account for tracking, inefficiency or just resolutions?
Juliette Alimena: I'm not sure.
Jeremy Andrea: Yeah.
Jeremy Andrea: yeah, yeah, I see here. Potential limitation of of the first simulation. In fact, okay, for sure, we need to solve the problem in Cld, but there are some algorithm algorithmic effect that might not be totally well reproduced.
Juliette Alimena: Oh, II noticed one other quick thing, and then I'll shut up. You
Juliette Alimena: the the plots say no selection. Are there any selections applied to to these plots? Maybe we need to go into some like. Oh, but you required at least 5 Gv. For the electrons. Right?
Gaelle Sadowski: Yes, yes.
Juliette Alimena: Okay. Hmm.
Alain Blondel: Okay. Alan, I have. Yeah, I have a question. The I have 2 questions.
Alain Blondel: and the first one is Cld. the click detector
Alain Blondel: certainly has the the software for doing event displays.
Alain Blondel: Have you tried to do event displays of these events to see what happened. Well, in which
Alain Blondel: in which cases misreonstructions happen.
Jeremy Andrea: I think. Yeah, you you run. Yeah. You run the event display at once. But we need not go through with
Jeremy Andrea: in much details.
Jeremy Andrea: This is but what we are trying to do is to do our own even displays like looking at the position of the heats, basically and see if we have hits. But no tracks or something like this. This is what currently we are trying to do. Right? Right?
Jeremy Andrea: But yeah, for sure. Sporting bad events and and look at even displays might might help
Alain Blondel: the the other thing concerning displaced viruses for particles which are that heavy
Alain Blondel: is that they will not be on time.
Alain Blondel: That is, the tracks will have a displacement in time, which is
Alain Blondel: because the the particle, as Beta equals point 5 or something.
Alain Blondel: So typically they have several nanoseconds of delay. So this might be a very, very a good way of selecting them.
Alain Blondel: Independently of that, he came out.
Alain Blondel: which is always a good thing to know, because
Alain Blondel: you can. You can be inclusive in the selection.
Jeremy Andrea: Yes, we need a good timing. We need a good timing measurement.
Alain Blondel: but the simulation must give you the timing. No.
Jeremy Andrea: II don't know. I would have to check. Yeah, I'm sure it's stored. It must be stored somewhere.
Jeremy Andrea: Yeah, yeah. Wouldn't make sense, indeed.
Alain Blondel: And that that would be fascinating, because this is one of the things that we in that paper that you quoted. It's one of the things which is mentioned that they.
Alain Blondel: the timing, actually measure because it's a two-body Z decay. The timing actually measures the mass of the particle that is produced.
Juliette Alimena: So what is available, or
Juliette Alimena: I mean, I'm wondering what could be available. The time for the electron to to reach the start of the calorimeters, or
Alain Blondel: it depends on the detector. You have, but certainly, if you have a
Alain Blondel: it depends on the design of the detector. These are big big delays, because the particles are very slow.
Alain Blondel: So. you know, normally
Alain Blondel: Silicon.
Alain Blondel: the new silicon vertex which this new silicon, which is used for the low angle detectors in LACS.
Alain Blondel: I'm told it is a 30 pico second timing precision on the hits. but I'm sure this is
Alain Blondel: too good for what you need, but it would be good just to start by finding out where that time is on the on the records.
Alain Blondel: plot them, and from these plots determine which
Alain Blondel: is the performance as a function of the timing resolution that you put, and then see if one can build a detector which has that timing resolution
Alain Blondel: that
Alain Blondel: the the II don't think we these detectors are not built yet, so we
Alain Blondel: yay, there is no need to ask people what timing resolution they have. and put, because they will say whatever
Alain Blondel: comes up the brains. This is a study to determine what is needed.
Juliette Alimena: Yep.
Juliette Alimena: Alan, did you have another question, or
Juliette Alimena: I think those were 2 questions already.
Juliette Alimena: So other questions or comments.
Juliette Alimena: Okay, I'm not seeing any. Thanks a lot, Cale. Then I think we can. Go to the second and final contribution for today from Patricia.
Patricia Rebello Teles - CBPF - Brazil: Actually, it's okay. So I will share my screen. Okay?
Juliette Alimena: Awesome.
Patricia Rebello Teles - CBPF - Brazil: Do you see the do you see my screen?
Juliette Alimena: Yes, and
Patricia Rebello Teles - CBPF - Brazil: she just sorry.
Okay.
Patricia Rebello Teles - CBPF - Brazil: so I would like to present you this analysis that I have been performing.
Patricia Rebello Teles - CBPF - Brazil: It's quite long time, but because of Covid so many names, many things. So it was delay at the bit. But well, now we have submitted to prd, and I will show you more details.
Patricia Rebello Teles - CBPF - Brazil: Well.
Patricia Rebello Teles - CBPF - Brazil: this is basic. So the the analysis is concerning the action, like particles. Okay in the Fcc electron Foster. So the motivation for acts like particles. So it's already well known. Okay, so it can solve the Cp problem. It's a very good dark matter.
Patricia Rebello Teles - CBPF - Brazil: a mediator for that sector. So we have. this. Still do number books. It's up. It is still the number of stone balls on. Okay, so and also it can solve the anomaly of the beyond. Normally, okay. So
Patricia Rebello Teles - CBPF - Brazil: also, it's very interesting. When we check in the inspired the development, the development of
Patricia Rebello Teles - CBPF - Brazil: papers, yeah.
Patricia Rebello Teles - CBPF - Brazil: about to action, like actions and like action like particles. So we see an increase during the last years that the last 13 years
Patricia Rebello Teles - CBPF - Brazil: sharp increase. Okay.
Patricia Rebello Teles - CBPF - Brazil: so in this figure, you can see more or less. In a general overview
Patricia Rebello Teles - CBPF - Brazil: where each
Patricia Rebello Teles - CBPF - Brazil: problem, yeah, each proposal for actions is located.
Patricia Rebello Teles - CBPF - Brazil: Okay, so we are, basically, let me see, once we are basically concentrated in colliders
Patricia Rebello Teles - CBPF - Brazil: searchers. So it is. But it can give. It gives you a general overview about the the status.
Patricia Rebello Teles - CBPF - Brazil: Okay. So in this analysis, I focus it on idea detector.
Patricia Rebello Teles - CBPF - Brazil: okay? And
Patricia Rebello Teles - CBPF - Brazil: the production of action like that goes via phone fusion. Okay? So it is so as you can see.
Patricia Rebello Teles - CBPF - Brazil: So it is the the output, the out signal
Patricia Rebello Teles - CBPF - Brazil: over the life by life background.
Patricia Rebello Teles - CBPF - Brazil: So both were generated
Patricia Rebello Teles - CBPF - Brazil: in Super Sheikh Gate Moto. That is, specifically it's a multicolor generator dedicated for this sort of of
Patricia Rebello Teles - CBPF - Brazil: signals. I use it. The the idea then I
Patricia Rebello Teles - CBPF - Brazil: I did the fast simulation. If in Delphis using PT. Processing and the
Patricia Rebello Teles - CBPF - Brazil: well assuming at that time. Yeah, when II produced the
the.
Patricia Rebello Teles - CBPF - Brazil: A realistic Fcc environment conditions.
Okay.
Patricia Rebello Teles - CBPF - Brazil: I will try to just recommend parentheses. So I have just check in the office. That is also a Cld card available. It was updated few months ago. So maybe I will try it later. Okay, to check
Patricia Rebello Teles - CBPF - Brazil: if there is any difference, and if I can get more results about it.
Patricia Rebello Teles - CBPF - Brazil: So, as I told you before, I am we are interested in this region, in the colliders
Patricia Rebello Teles - CBPF - Brazil: regions. So and the in this not covered
Patricia Rebello Teles - CBPF - Brazil: in this in in blue
Patricia Rebello Teles - CBPF - Brazil: here. Okay, so what could we achieve with the confusion in the Fcc in this in this blue region in the relatively heavy out region. So
Patricia Rebello Teles - CBPF - Brazil: help miss. Bigger than Dot
Patricia Rebello Teles - CBPF - Brazil: one gp.
Patricia Rebello Teles - CBPF - Brazil: okay? So for that. we choose a benchmark open for dot, one TV and inverse TV.
Patricia Rebello Teles - CBPF - Brazil: And we produce it. The samples for different sent off mass in the Fcc run. also scanning the mass range. Different mass range up to the
Patricia Rebello Teles - CBPF - Brazil: any. The mess according to
Patricia Rebello Teles - CBPF - Brazil: okay. So doing that.
Patricia Rebello Teles - CBPF - Brazil: you see, we also assume it the up to date parameters for Fcc running. So these are the the parameters for energies and luminosities, integrated luminosities for the Fcc runnings.
Patricia Rebello Teles - CBPF - Brazil: So we think run, one run, 2, depending on the the.
Patricia Rebello Teles - CBPF - Brazil: the central mass energy. Okay.
Patricia Rebello Teles - CBPF - Brazil: as an example
Patricia Rebello Teles - CBPF - Brazil: we. And also because this is the the Z poll, and it would be the first run now of the Fcc. I added. Some numbers here for you, for your knowledge. So it is in the paper also. And you see here the the mess for 9 91 gv, so in the Z poll.
Patricia Rebello Teles - CBPF - Brazil: using 204 integrated luminosity. And you see here, the the detector efficiency. So the use out use are huge. Okay?
Patricia Rebello Teles - CBPF - Brazil: Course the the light by light, too. But you see it is it will. It is, it decreases according the
Patricia Rebello Teles - CBPF - Brazil: the the the mess, the the mess point.
Okay.
Patricia Rebello Teles - CBPF - Brazil: We use the the to calculate the significance.
the the usual.
Patricia Rebello Teles - CBPF - Brazil: the usual formula, and also the parameter of interest based on the frequentist limit, asymptotic asymptotic limits
Patricia Rebello Teles - CBPF - Brazil: to get the upper limit for the couplings and the for for the cross section. Okay, so
we
Patricia Rebello Teles - CBPF - Brazil: as you can read here. So we kind of computed
Patricia Rebello Teles - CBPF - Brazil: the same. In the same way, of of course, for all. Runs.
Patricia Rebello Teles - CBPF - Brazil: send our room scenarios and for all luminosities. From that one to 3, 360 around 365 Gv.
Patricia Rebello Teles - CBPF - Brazil: okay?
Patricia Rebello Teles - CBPF - Brazil: So we thought so after this computation, as I told you, we got the expected upper limit for Cross section. And you can see here. So we we have the the bandwidth, the Brazilian lots
Patricia Rebello Teles - CBPF - Brazil: 68 95%. It expected for different limit sections and energies.
Patricia Rebello Teles - CBPF - Brazil: So just I mean, it's just a command. So we did also
Patricia Rebello Teles - CBPF - Brazil: all this calculation for the International linear Collider. Okay.
if you want a yeah, we can check in the paper.
Patricia Rebello Teles - CBPF - Brazil: And what we got. Yeah. So in general, now, so Fcc
Patricia Rebello Teles - CBPF - Brazil: bounds are better than any other current and future experiment.
Patricia Rebello Teles - CBPF - Brazil: Okay, so we see here for our channel, the for confusion.
We check there. There are very prominent limits for up searches
Patricia Rebello Teles - CBPF - Brazil: in our mass range. and we can see the copies of from minus 2 or 10 minus 2 to 10, minus 3 inverse
Patricia Rebello Teles - CBPF - Brazil: dev, TV. Okay, so we see different colors for different images here. So
Patricia Rebello Teles - CBPF - Brazil: it is very prominent.
Patricia Rebello Teles - CBPF - Brazil: It's the most instrument limits for the couplings up to title manuscript.
Patricia Rebello Teles - CBPF - Brazil: Of course, that is also the the alternative channel.
Patricia Rebello Teles - CBPF - Brazil: as the elect elect with the usual electro positive collision producing the Z.
Patricia Rebello Teles - CBPF - Brazil: So this is very it was. It was analyzed by Bower. So this is a favorite channel because of the large Z production.
Patricia Rebello Teles - CBPF - Brazil: For this, for the for this center of mass energy, and also like tiny
Patricia Rebello Teles - CBPF - Brazil: 3 z, 2, 3 for terms of background. So we see that it it, it goes down up to it goes down to 10 minus 5 inverse TV for this channel.
Patricia Rebello Teles - CBPF - Brazil: But even so, so it is. So both are more or less complementing each other each other. Okay? Because, maybe, you see, yeah, when we we when we
Patricia Rebello Teles - CBPF - Brazil: reach to higher masses. So the Fcc. The fought on photon fusion behaves better.
Patricia Rebello Teles - CBPF - Brazil: Then the the
Patricia Rebello Teles - CBPF - Brazil: the, the a little poster. Gemma.
Patricia Rebello Teles - CBPF - Brazil: Okay. So you see the yellow it goes. It is behind here. But you see that we have better behavior.
Patricia Rebello Teles - CBPF - Brazil: We also coco computed the displays, the the displaced vertex. So using the average options versus decay length
Patricia Rebello Teles - CBPF - Brazil: from different values.
Patricia Rebello Teles - CBPF - Brazil: 30 one centimeters, and 2 meters.
Patricia Rebello Teles - CBPF - Brazil: And we see. So we see here, this line. So this is we computed both for our channel for confusion and for the updated channel.
Patricia Rebello Teles - CBPF - Brazil: that production maybe. So we sit here in this line. So most of the photon fusion production
Patricia Rebello Teles - CBPF - Brazil: will be in this region. So up to 1 cm, so it would be indistinguishable from the primary vertex.
Patricia Rebello Teles - CBPF - Brazil: On the other hand.
Patricia Rebello Teles - CBPF - Brazil: this is for for the Z production, so for the Latompos to Z, and then the K it would reach a good.
Patricia Rebello Teles - CBPF - Brazil: a good
Patricia Rebello Teles - CBPF - Brazil: scenario for getting the secondary the secondary vertex. because.
Patricia Rebello Teles - CBPF - Brazil: as you see here, in this black line.
Patricia Rebello Teles - CBPF - Brazil: so we have most of this
Patricia Rebello Teles - CBPF - Brazil: production up to 2 meters, actually more than 2 meters for different messes out masses. So
Patricia Rebello Teles - CBPF - Brazil: in this channel we could check, we could see the the secondary vertex purchases. Okay.
Patricia Rebello Teles - CBPF - Brazil: so so in general.
Patricia Rebello Teles - CBPF - Brazil: is that so there are more results in the paper, as I told you with the Iac.
Patricia Rebello Teles - CBPF - Brazil: And so our conclusions are that so
Patricia Rebello Teles - CBPF - Brazil: out action, like particles. Very good candidates for many extensions of this standard model. Okay? So mainly because, it is a good candidate, for that matter. And we see many
Patricia Rebello Teles - CBPF - Brazil: papers in the
Patricia Rebello Teles - CBPF - Brazil: in the web about it. Yeah.
Patricia Rebello Teles - CBPF - Brazil: we did the the feasibility. We did a few full analysis from hard skating to the to the detective simulation. Actually, we have presented this analysis in the past in one of the Fcc workshops, but with the hard scheduling so part of level.
Patricia Rebello Teles - CBPF - Brazil: then we move it to the detector simulation.
Patricia Rebello Teles - CBPF - Brazil: We did it for different mess points, energies and integrated.
Patricia Rebello Teles - CBPF - Brazil: We see, that the Fcc operation that's zippo, because of the huge integrated luminosity.
Patricia Rebello Teles - CBPF - Brazil: can offer an exceptional opportunity to discover outs within the mess window
Patricia Rebello Teles - CBPF - Brazil: from
Patricia Rebello Teles - CBPF - Brazil: lower, even lower than that one. But dot one to 92. So the threshold in the energy.
Patricia Rebello Teles - CBPF - Brazil: okay.
Patricia Rebello Teles - CBPF - Brazil: we have the the couplings
Patricia Rebello Teles - CBPF - Brazil: in also in both scenarios are much better than the current limits at partco providers. Okay.
Patricia Rebello Teles - CBPF - Brazil: even better. In the
Patricia Rebello Teles - CBPF - Brazil: when we we are dealing with the Z production. Okay?
Patricia Rebello Teles - CBPF - Brazil: So we see that somehow the photon fusion complements
Patricia Rebello Teles - CBPF - Brazil: will complement the the Z searches
Patricia Rebello Teles - CBPF - Brazil: for masses greater than 91 Gv. And so we we could check in the
Patricia Rebello Teles - CBPF - Brazil: in the plot became
Patricia Rebello Teles - CBPF - Brazil: so that's it. As I told you, I will try to check
Patricia Rebello Teles - CBPF - Brazil: other Co. Other detectors. So II didn't have access to
Patricia Rebello Teles - CBPF - Brazil: C. Id, and also the the other proposals for detectors.
Patricia Rebello Teles - CBPF - Brazil: And we we follow with other chats
Patricia Rebello Teles - CBPF - Brazil: for this, the same channel in in others, and in other other
Patricia Rebello Teles - CBPF - Brazil: collider scenarios.
Patricia Rebello Teles - CBPF - Brazil: Okay, I hope to to give you news as soon
Patricia Rebello Teles - CBPF - Brazil: so as soon as possible about it.
Juliette Alimena: Okay, great thanks. A lot
Juliette Alimena: questions.
Juliette Alimena: Maybe I can start with one. So yeah, I was. Well, you showed us some some tables and the limit plots. But I was wondering if you had any distributions. Maybe they're they're in the paper of of how the the signal and the background. Look in the detector. I was wondering.
Patricia Rebello Teles - CBPF - Brazil: Yes, I have. Yes, I have. So we see we see this line. Do you see that it is in the paper. So I didn't add to
Patricia Rebello Teles - CBPF - Brazil: So in the paper, you can see the the distributions. So yeah, that. yeah. So yeah, you see the the variant math. This is only this is a fit. Okay, so it is.
Patricia Rebello Teles - CBPF - Brazil: just to emphasize the signal over the background.
Patricia Rebello Teles - CBPF - Brazil: Here, you see the Pt, the, the
Patricia Rebello Teles - CBPF - Brazil: the angle angle, and the also the
Patricia Rebello Teles - CBPF - Brazil: think
Patricia Rebello Teles - CBPF - Brazil: we see that this this photos are very well, very collimated for high masses, you know, for low masses. Yeah. As expected, it was already pointed. So we we can confirm that. So this is for 50 Gv.
Patricia Rebello Teles - CBPF - Brazil: So far.
Patricia Rebello Teles - CBPF - Brazil: No sorry this is for yet.
Patricia Rebello Teles - CBPF - Brazil: Yes, for 50, yeah. or 50. Gv. so I just so add
Patricia Rebello Teles - CBPF - Brazil: 2 mess points, because there are. There are many plots about it. But we selected the most the the better ones to
Patricia Rebello Teles - CBPF - Brazil: to expose them. Their behavior. Yeah, we can see the the the behavior of the energy for one. So
Patricia Rebello Teles - CBPF - Brazil: this is.
Patricia Rebello Teles - CBPF - Brazil: it was very interesting. We see the behavior of this
Patricia Rebello Teles - CBPF - Brazil: boosted the in high for high energy, for for for low masses. And
Juliette Alimena: okay? And I think.
Juliette Alimena: at least this figure 2 is for generator level. Do you also have reconstructed level? How do they compare.
Patricia Rebello Teles - CBPF - Brazil: This is for generator. Yeah, but I didn't add all figures, for this is for hip construction
Patricia Rebello Teles - CBPF - Brazil: 50. So I just add the the variant mess.
Patricia Rebello Teles - CBPF - Brazil: But so
Patricia Rebello Teles - CBPF - Brazil: you want. I can. I can show you later the
Patricia Rebello Teles - CBPF - Brazil: the other figures for the construction.
Patricia Rebello Teles - CBPF - Brazil: I just if so I just showed the the construction for the environment was
Patricia Rebello Teles - CBPF - Brazil: to flood the office.
Juliette Alimena: Okay, II was just curious in general how well they're reconstructed and the generated agree, as you saw in the previous talk. You know, the there could be some some issues for
Patricia Rebello Teles - CBPF - Brazil: okay? So II can. I can produce. I can. I can enable them. They constructed the via the token. the other plots for energy and
Patricia Rebello Teles - CBPF - Brazil: no problem.
Patricia Rebello Teles - CBPF - Brazil: Well, I mean, if you tell me that they agree well, then then they agree, of course. No, they agree. Yeah, because we avoid it to to to
Patricia Rebello Teles - CBPF - Brazil: polluted the paper. Yes, so.
Patricia Rebello Teles - CBPF - Brazil: And then we decided only to add the generator level. And so the the the reconstruction follows the same path. So the same
Patricia Rebello Teles - CBPF - Brazil: the same.
Juliette Alimena: thanks. Behavior. Okay? Great great.
Patricia Rebello Teles - CBPF - Brazil: Yeah. So you see here. So if you if you check this video for
Patricia Rebello Teles - CBPF - Brazil: so you see, this is on the left, you have the multi-colour right and on the right. You have the idea.
Patricia Rebello Teles - CBPF - Brazil: So
Patricia Rebello Teles - CBPF - Brazil: you see exactly the efficiency of the detector, because the idea is start with energy for portals
Juliette Alimena: greater than 2. And you see, there are more plots, of course, but we only focus it on
Patricia Rebello Teles - CBPF - Brazil: this one. So
Patricia Rebello Teles - CBPF - Brazil: in figure 2, 3, it is a generator only. Okay. And in figure 4,
Patricia Rebello Teles - CBPF - Brazil: I put some generator on the left and
Patricia Rebello Teles - CBPF - Brazil: the the
Patricia Rebello Teles - CBPF - Brazil: detector on the right, just to to show
Juliette Alimena: the effect of the the detector.
Juliette Alimena: Okay, great thanks.
Juliette Alimena: Other questions. Oh, sorry. Sorry.
Patricia Rebello Teles - CBPF - Brazil: Okay, so so we are, improving other scenarios as well. Okay.
Patricia Rebello Teles - CBPF - Brazil: And so as I told you hopefully.
Patricia Rebello Teles - CBPF - Brazil: we. We have more results in the future. I want also to try other detectors.
Patricia Rebello Teles - CBPF - Brazil: I have just seen in the the office
Patricia Rebello Teles - CBPF - Brazil: that CID is available
Patricia Rebello Teles - CBPF - Brazil: in the past. So II tried to use Key for half key for Hep for these analysis, and for some reason
Patricia Rebello Teles - CBPF - Brazil: the the thought of fusion. This sort of signal was not working well in the framework of Fcc.
Patricia Rebello Teles - CBPF - Brazil: I don't know. So I didn't try anymore. So I don't know if it if it is, fix it.
Patricia Rebello Teles - CBPF - Brazil: But well. I hope to try in the future
Patricia Rebello Teles - CBPF - Brazil: to use the the framework. Yeah. Effects this year.
Patricia Rebello Teles - CBPF - Brazil: Okay, so far, I have been doing. II am doing everything with the office stand alone. Right? So
Patricia Rebello Teles - CBPF - Brazil: it's not inside the Fcc software.
Juliette Alimena: I see. Okay, thanks
Juliette Alimena: other questions or comments.
Juliette Alimena: If not, I had one more if you show the the one day limit plots again.
Juliette Alimena: I wondered if you could explain the the behavior. Think around like 10. What was it? 10 gv, you know, there's a sharp
Juliette Alimena: corner, almost.
Juliette Alimena: Yeah, these way. We'll wait. Just go past it.
Patricia Rebello Teles - CBPF - Brazil: This is the. So this is the
Patricia Rebello Teles - CBPF - Brazil: cross section, the links for Cross section. Yeah. Sorry. This is what I'm what I meant. It's not 10 gv, I'm just wrong. More like
Juliette Alimena: What happens there?
Patricia Rebello Teles - CBPF - Brazil: What? Sorry? What do you mean? This this one, this this peak here?
Patricia Rebello Teles - CBPF - Brazil: Well, what I what II no notice. Is that so in this region? That is a difference. When so it is a transition.
Patricia Rebello Teles - CBPF - Brazil: a transition region. When you have the photos? So the collimated photos to more separated one.
Patricia Rebello Teles - CBPF - Brazil: So then you have a a difference. So you see in the in the cross section values.
Patricia Rebello Teles - CBPF - Brazil: and these affect the these affect the the parameter, the the computers of the the value of the parameter. So.
Patricia Rebello Teles - CBPF - Brazil: and also, of course, I didn't compute it
Patricia Rebello Teles - CBPF - Brazil: as I continue right, so maybe it's not so sharp, but
Patricia Rebello Teles - CBPF - Brazil: so I compute that for dot one and dot 5, and then one. So if I put more values in the middle. Maybe this peak would disappear. But well.
Patricia Rebello Teles - CBPF - Brazil: this is this is a a problematic region, because of this difference
Patricia Rebello Teles - CBPF - Brazil: in the photon distance. Right? So it it it. The photons started to separate from Dot 5,
Patricia Rebello Teles - CBPF - Brazil: right? And the
Patricia Rebello Teles - CBPF - Brazil: so it's a
Patricia Rebello Teles - CBPF - Brazil: a a grey region, I would say.
Juliette Alimena: Okay, I'm I'm just curious. Do you know why this happens at like point 5? Gev, what is what's special at that mass?
Patricia Rebello Teles - CBPF - Brazil: Nothing special, just nothing special. Just the the fact that
Patricia Rebello Teles - CBPF - Brazil: it starts so for that one. The photos are very collimated, very together, very close. Right? So.
Patricia Rebello Teles - CBPF - Brazil: And then it starts to open me
Patricia Rebello Teles - CBPF - Brazil: from more from so for higher m energies, right from Ims. So from dot 5 up to
Patricia Rebello Teles - CBPF - Brazil: 5, they that. So they are plot is it. It starts to to be closer to.
Patricia Rebello Teles - CBPF - Brazil: So if maybe I could check. So you see so their planarity here. So for that one, the is we see
Patricia Rebello Teles - CBPF - Brazil: it should pick 2 0 right
Patricia Rebello Teles - CBPF - Brazil: when you have a well separated photos.
Patricia Rebello Teles - CBPF - Brazil: So what happens when you from dot one. So this is Dot. This is for one, right
Patricia Rebello Teles - CBPF - Brazil: for one gv, so even for one, it is not very.
Patricia Rebello Teles - CBPF - Brazil: It's not picking picking close to 0. Right?
Patricia Rebello Teles - CBPF - Brazil: So it. This behavior will go from 0, from dot one to
Patricia Rebello Teles - CBPF - Brazil: more or less less than 10. Gly. Okay, so
Patricia Rebello Teles - CBPF - Brazil: it it is distributed is not so sharp in 0. So from
Patricia Rebello Teles - CBPF - Brazil: Then when we go to higher, so higher than 10 Gv.
Patricia Rebello Teles - CBPF - Brazil: II have a plot with these. With this comparison I can, so II cannot access here now, but I have a plot with this comparison for different masses, the differences in their comp, the behavior. So, for instance, in this 50 Gv. For mass, g. 50, gv.
Patricia Rebello Teles - CBPF - Brazil: you see, we see that it's closer to 0, right? Because of the the the.
Patricia Rebello Teles - CBPF - Brazil: The the x is here is from 0 to dot 3,
Patricia Rebello Teles - CBPF - Brazil: while from here for 0 to
Patricia Rebello Teles - CBPF - Brazil: one. Okay, so it's different. Right? Okay?
Patricia Rebello Teles - CBPF - Brazil: So this is the the case of fro up to 10 gv.
Patricia Rebello Teles - CBPF - Brazil: the photos are very close to each other.
Patricia Rebello Teles - CBPF - Brazil: Okay.
Patricia Rebello Teles - CBPF - Brazil: from the decay right from the from the out decade, right? So the the photos are relatively close. So
Patricia Rebello Teles - CBPF - Brazil: to each other. And from T them TV, they start to open more. Yeah.
Juliette Alimena: it is a
Patricia Rebello Teles - CBPF - Brazil: I can, I can tell. I can send to you the the plot I can. I will add this plot with the mass comparison
Patricia Rebello Teles - CBPF - Brazil: in the in Github for for you to check. It's it's interesting. It is interesting.
Juliette Alimena: Yeah, it's just for for my understanding. Thanks.
Patricia Rebello Teles - CBPF - Brazil: it will be important for detectors. Right? So we need the high granularity a way to to
Patricia Rebello Teles - CBPF - Brazil: to detect this photos. If if you want to reach lower mass, right? So
Juliette Alimena: right.
Patricia Rebello Teles - CBPF - Brazil: it's something that it's already well known. It was already pointed in other papers. But well, if we we confirm it also in this option.
Juliette Alimena: right? Okay? Other questions.
Juliette Alimena: Okay, I'm not seeing any. I didn't have any others. So thanks. Thanks. Again, Patricia. Thank you very much for the opportunity. Of course.
Juliette Alimena: Okay? Any other general comments before we break for the year?
Juliette Alimena: Okay, thanks. Everyone. Have a good Christmas break and rest full time. Happy new Year.