Margaret Susan Lutz: Today, on the protocol workshop, and I propose, maybe we wait one more minute in case there are a few more people who are late coming back from lunch, and then we can get started with a talk from Christine.
Margaret Susan Lutz: Christian.
Thanks.
Juliette Alimena: I think the number of purchase been says about stabilize new we should go ahead.
Margaret Susan Lutz: yeah good answer question.
Margaret Susan Lutz: Can you go ahead and try to fight.
Margaret Susan Lutz: song became first are from Christina and i'm coming up from the top, which sounds like a very cranky title.
Margaret Susan Lutz: Not even see.
Can you see me.
Margaret Susan Lutz: Yes, I can see your sides.
Christiane Scherb: And I guess you can also hear me, yes, I can start.
Christiane Scherb: Okay um yes just just said, I want to talk about it today, and more specifically about charming if that's.
Christiane Scherb: Basically lights states that copper dominant, which was a type crocs and have can have play by violating companies.
Christiane Scherb: I think I talked the first time about charming I have like a year ago and they talked about how they can have this type of violating couplings.
Christiane Scherb: and possibly be wrong lift, and then the search for dedicated detectors and back then someone asked me, yes, but how could research for them it's the interaction so that's what I will talk about today how to search for long lived.
Christiane Scherb: In accepted the case.
Christiane Scherb: Based on work done with Africa Mona theaters violent to me and.
Christiane Scherb: So let me quickly review the framework, while back, we are thinking, and so we consider general I where the APP has only treat ever kept links to the right tenant APP type crocs.
Christiane Scherb: So we have some coupling see you.
Christiane Scherb: That is a three by three matrix in our case, and can have of diagonal entry, so that we can have flavor violating effects from Kathleen.
Christiane Scherb: And I said earlier, it's coupling dominant to that type crocs because, of course, if we consider loops and the randomization equation running.
Christiane Scherb: We always will have couplings to leptons down type quarks and gluons as well.
Christiane Scherb: And what is very interesting about these kind of models and also quite nice from a phenomenal logical point of yours, that you can probe.
Christiane Scherb: A wide range of five masters various processes, we look at very small I have masters and the ev okay be rich and we can have cosmological and astrophysical prob if you go to the like one gv region of.
Christiane Scherb: We can have flavor props and if we go to even higher masses, because such fives and charming eyes of classic colliders six target experiments and so on, and.
Christiane Scherb: I don't want to talk about all the possible searches, one could do so I just chose the parameter space here, where we have, on the one hand side under one excess of one over.
Christiane Scherb: A coupling and on the other hand, the mass of the if everyone can see that the lower region upsides pretty much constrained by astrophysics.
Christiane Scherb: And cosmological constraints, for a little bit time as we have our display their constraints.
Christiane Scherb: But then, if we go to even higher masses, we have such large right which here were no constraints and researchers have been done so that's the region, I will be talking about today and.
Christiane Scherb: It can only be also busy and posit higher math is only constraint that still valid, SMEs are mixing constraint from video mixing and I have drawn a little diagram appears of the.
Christiane Scherb: Music mixing in our cases only.
Christiane Scherb: camera try spicer captaining see 1261 so we can easily handle that.
Christiane Scherb: constraint So how could repurpose this right reaching over there, our idea was exactly the exotic up the case.
Christiane Scherb: Namely the decay of the top to an ad and then other like uptight crocs of attraction and strong yeah.
Christiane Scherb: And, as I said, we want to avoid study by mixing constraints of examples coupling that comes to us to zero.
Christiane Scherb: And then refined another nice future, namely that we can use the diagonal couplings to choose the lifetime of the charming, is why we use of diagonal couplings to choose a friendship ratio of this ecstatic.
Christiane Scherb: Of decay, so we only consider to parameters, the diagonal happenings, which are all equal and so often of cufflinks except of service.
Christiane Scherb: and want to capitalize that are also are equal, then one can see is that given branching ratio by.
Christiane Scherb: Changing the diagonal coupling one can change the lifetime, as seen on the red side as a test and dotted lines come from changing the diagonal coupling.
Christiane Scherb: So one can force the same production frenchie ratio get different lifetimes, but when can also see here quite nicely as if we want to think long enough, and that is what we want to think about it makes sense to stay in somewhat like mass region so like one to 10 G we.
Christiane Scherb: know in the following we're also not yours to coupling parameters, we have as our free parameters patents that's a lifetime interpreting ratio as a bit more indicative.
Christiane Scherb: The next step if we want to look at this topic case we need to know how the charming, I have the case.
Christiane Scherb: That is shown here and not everyone can clearly see that are considered mass REACH and the main became out of the chairman Apps would be to have drones.
Christiane Scherb: So Father very light mass of the Bush be mainly clearance shown and the green line and then for higher masses, it would be mostly to chunk works.
Christiane Scherb: We don't have like violating the case of the IP because we have sets us to one to one company to zero, so we only have.
Christiane Scherb: Two Apps to chance to glance as a final state of I, so the total final state would be one live chat and then to chats from Zion and they will mostly be seen as one shot, as it is highly boosted and the case displaced.
Christiane Scherb: And, before I move towards a search, we propose production process let's look at what has already been done for flavor violating top couplings so we can look at the prompt region where we would have a top and some checks from the prompt decaying violating.
Christiane Scherb: that's like an 0.01 centimeter region, then we can have a little bit higher life times, where we have the case after that.
Christiane Scherb: And the 2.5 to two meter region, and then, if we have if being stable on collider states on collider scares.
Christiane Scherb: We would have appearing as missing energy and, as such, so we also look at topless losing energy searches, we have such a flavor violating coupling spend more what one can see here that there's quite a gap and.
Christiane Scherb: Just basically between this to me times 10 meter here.
Christiane Scherb: So that's the gap, we want to close research we propose and what we specifically look at the top pair production, we are one of the top the case as a standard model.
Christiane Scherb: Top decay is a big one, and the w and the other top decay, so the flavor violating way I described earlier we look at us for two months one to gv and the other 10 GB and without going to.
Christiane Scherb: completely unreasonable parameter choices for the couplings and coupling constant at a we get lifetimes and one millimeter to 10 meter regions or we can cover quite a bit of lifetime.
Christiane Scherb: and still have somewhat reasonable friendship ratios of exotic complicated.
Christiane Scherb: We propose more or less to search strategies one quick follow one rails applications are trying to color meter and one more the last five decades and Leon spectrometer.
Christiane Scherb: First let's have a closer look at what happens inside the case and the Atlantic kilometer so our signal, what have three to five chats.
Christiane Scherb: Maybe six if we are the two charts from the APP and one or two of them will be displaced and another one should be the tech so that's the first material, we put on our search, then the second thing that happens is that if the application is running calorie meter.
Christiane Scherb: If all its energy and chronic color and Rita and basically none and electromagnetic header image, so the ratio of the energy, the positive and the two kilometers where the batch and the other hand, can be that happens, a lot.
Christiane Scherb: of our standard model background like TT bad this racial terrorism of the ratio would be distributed around zero where we have the same amount of energy deposited in electronic and energy electromagnetic coloring.
Christiane Scherb: On the other hand.
Christiane Scherb: Signals Sean was a colorful lines what pete later.
Christiane Scherb: bye.
Christiane Scherb: Putting a cat on the ratio of we can reduce the background another future signal assets is neutral, so it leaves no tracks and the tracker.
Christiane Scherb: On the other hand, the standard model check that, for some reason, still has a splash color meter ratio will have tracks, as shown alone with a number of tracks.
Christiane Scherb: For such standard model chats that are appearing displays according to the color retire ratio, as shown and on the doctor allowing this four tracks risk PT lectures and twitch TV and the light blue is for the.
Christiane Scherb: Four tracks, without any cuts on the PT and it can be seen in both cases that they appear tracks, and so we put a cap on the number of tracks, we can also reduce the background drastically and the results of those two cans.
Juliette Alimena: are shown in the same you have about two minutes left thanks.
Juliette Alimena: Thanks.
Christiane Scherb: So where we can see that both the color meter ratio.
Christiane Scherb: CAP, as well as the cat on the tracks will reduce the background around two orders of magnitude, so they have post pride power for cats let's have a very sharp look at what would happen if the applications spectrometer, then we would have one chat last because we don't have a check from.
Christiane Scherb: And step we have one event and amanda's TIM was no associated tracks pointing to the primary tactics, we assume that faction zegna could be searched for background free, of course, we are all coming from series of.
Christiane Scherb: No guarantee on that statement that already brings me to the results so in the shaded regions with the proposed ma equates to TV and country the region that is excluded already from the thing top class map and thing I talked last check searches.
Christiane Scherb: Why the red line, further to the right shows the music map expected exclusion region from the search and the electronic calculator that I described earlier plus 350 inverse and to ban and the main difference between the two masters, is that 510 GB is is a little that boosted so.
Christiane Scherb: lines basically moved up a bit, and one can see that already Western search, we propose on contest trenching reaches up to like 10 to the minus for a little bit slower even.
Christiane Scherb: And the fun thanks have a background research, which we think could be possible for us a bit more sophisticated strategies that one could reach both from the case and try and make spectrometers my lessons we understand down to around 10 to the minus seven and verse higher luminosity.
Christiane Scherb: One could possibly even reach down to punching ratios 10 to the minus eight so that already brings me to my conclusion so.
Christiane Scherb: What we propose the searching for new physics and as the access and we have seen that most of the parameters based upon.
Christiane Scherb: challenge threshold is actually pretty much unconstrained and that's a very interesting way to prove this parameter space just by looking into accepted up the case.
Christiane Scherb: And that already and not overly complicated such stretchy cut pro frenchie ratios down to 10 to the minus four and possibly more sophisticated searches could even proves that cried a lot.
Christiane Scherb: That was that's already it thanks.
Margaret Susan Lutz: Thank you so much, very interesting.
Margaret Susan Lutz: question.
Margaret Susan Lutz: Yes.
Matt Strassler: Yes, so this is a nice example of a very general search strategy.
Matt Strassler: I mean there's you you've chosen a specific model, but in general, one should be looking for exotic top the case but along with particles in it.
Matt Strassler: The thing is that by by I mean you, focus our attention on the multijet final state but there you have more trigger issues and and more background than if you focus on the case where one of the tops to case botanically so, then you have potentially leptons trigger.
Matt Strassler: yeah Tom Jensen and and and a general a very general search for left on plus displaced vertex.
Matt Strassler: Is you know that that's the kind of strategy, we should be pursuing as a as a very broad search strategy in the Community, I just want to what what you what you looked at as far as trigger and what you want, why you didn't use the laptop.
and
Christiane Scherb: What we consider us basically that's the standard model like top decay, again we.
Christiane Scherb: Are from with your reside so anyone from the experimental side wants to correct me please do so that we can reconstruct the standard model like decaying top.
Christiane Scherb: Those that we didn't focus on reconstructing it, of course, that can be possible and it's probably easier by doing it under electronic general but we don't focus on that part at all, we make.
Matt Strassler: Sure i'm not i'm not referring to reconstructing i'm referring to just getting the actual event recorded.
Christiane Scherb: yeah although there that's something we have we basically say okay that's the past was experimental as we focus on the path that has new physics and not understand that model like pat.
Matt Strassler: Okay, thanks.
Margaret Susan Lutz: Thanks, and I see it, we have time for one more question from Susan.
Susanne Westhoff: Thank you Christina Christiana that was interesting.
Susanne Westhoff: And I have a question about the shorter proper lifetimes you mentioned them in the beginning, and said that you want to bridge the gap between two meters and then basically stable.
Susanne Westhoff: OPS have been searches for these shorter lifetimes I was wondering if they have been searches being done that use the tracker rather than the kilometer could you comment on that.
Christiane Scherb: I can comment too much what I can say what we use here is basically.
Christiane Scherb: Just one where we happen singer talk with chats that have.
Christiane Scherb: A flavor violating coupling likes diagrams shown up here and.
Christiane Scherb: We have these two lifetimes because, and those are just there's no additional be taking allowed, so the flavor violating chat basically shouldn't happen detect and the beta capitals in between those two regions so that's where those two regions are coming from.
Susanne Westhoff: And the other thing is means that just the search for a single top plus plus met already assumes no Sorry, I think I don't understand where these two regions actually come from, so what is displaced or.
Susanne Westhoff: yeah respect to background that they say Okay, we focus on the region where PD case are prominent and they happen at a short lifetime and then we have one search reaching where everything is really requested to be prompt and you have a beetle for long lift constituents.
Christiane Scherb: yeah that's kind of what we consider so in one case with is if the case outside of the detector that's where the 10 meter comes from that's just sitting on top classmates directions.
Christiane Scherb: Then, on the other hand, we can have the I became really prompt so, then we have a top and some chats from that right.
Christiane Scherb: And those chats forums meetups ethno be tech or anything.
Susanne Westhoff: It should.
Christiane Scherb: Be only live chats in there, so from what we found is that the p tech were crisis events called chats in between the 0.10 centimeter and 2.5 centimeters.
Christiane Scherb: So we basically exclude further problems such as all upset with decay and least reaching because.
Christiane Scherb: Imagine that those chat could be reconstructed at the tech so that's where those two numbers come from and attempt to meet up and come from the end of the color meters basically.
Susanne Westhoff: Okay, thank you so it's related to the requirements by by P tagging right that allow you to interpret that search yeah Thank you.
Margaret Susan Lutz: Okay Thank you so much as an extra questions and, of course, for the next presentation, of course, if you have more questions feel free to put them in.
Margaret Susan Lutz: So next we have talk from Ruth about.
Margaret Susan Lutz: Apps from the details about two.
Ruth Schäfer: Years can you all see my screen.
Ruth Schäfer: Yes, perfect.
Ruth Schäfer: Yes, I will talk about option really cares about Su and, specifically, I will talk about.
Ruth Schäfer: The distinction between displaced and invisible the case and which may be better to explore the searches, of course, we all heard about long of articles over the next few days, the last two days, so I don't need to introduce anything here.
Ruth Schäfer: But important point for my audience that generally most particles, have a lot of different the case signatures and a lot of the interesting ones are either displaced.
Ruth Schäfer: or they may particles that are so long that it came out of the detector that is the missing energy switches which are the to the purpose on today.
Ruth Schäfer: Now we're we're currently in the in the obsession, so our benchmark model for this study.
Ruth Schäfer: and specific views and effective an effective theory, where we have an open addition to the standard model, and we have one of either either of these towns, which is to say we have either an hour that couples in the ub to finance or two w verizon's and.
Ruth Schäfer: We studied this at belted, which is an a plus minus collider with small boost very little background, especially in the displaced way, and that is optimized for be the case.
Ruth Schäfer: And so we look at is an are produced from a B to katie K.
Ruth Schäfer: Which means that we.
Ruth Schäfer: We have to consider the running of this theory here to get to five changing current.
Ruth Schäfer: Now let me, let me get to that the first half of our comparison, which is displays the case, what we assume here is that we have dedicated.
Ruth Schäfer: into Okay, and an out and out the case, to paraphrase a little particles within that attack, but as to say within the tracking with such a distance that we should still make art.
Ruth Schäfer: The tracks in the US.
Ruth Schäfer: And then we can we can show the number of displays particles of just depends what happened in this way by particles compression ratio into the olive.
Ruth Schäfer: branch in ratio of the offer to the final state efficiency and then this factor which tells us how many of the OPS decay after we have reached vertex resolution length and before it reaches the edge that attack.
Ruth Schäfer: And that gives us a plot like this, where we have made a simulation with our event generate data resumes your background here.
Ruth Schäfer: And we've looked at your final states either into electrons or two meals per capacity hour later and listening energy search.
Ruth Schäfer: And we see here that has new ones, we can we can explore quite low coupling of enter.
Ruth Schäfer: Up to abolish two three TV.
Ruth Schäfer: Whereas when the electrons we stare at a much.
Ruth Schäfer: much smaller coupling, which is due to the presence of mass and bill.
Ruth Schäfer: The branching ratios the.
Ruth Schäfer: The other half, and the more involved part of our paper, where the invisible the case where we have enough that is produced by the case outside of the detector and here, unfortunately, we can of course not say that we have no backwards.
Ruth Schäfer: Why, because a lot of things are all look invisible to detector.
Ruth Schäfer: And so what we do is.
Ruth Schäfer: We have to do this as an inclusive such we look at all of the decade particles of the whole Sunday K.
Ruth Schäfer: And that is to say, we take into account everything that both first be not to be too Okay, and also the second being that we don't know the decay of the case and chip.
Ruth Schäfer: And then we have to also analyze all possible backwards and we've taken into account be based backgrounds, but also continuing backwards from water towers that are produced directed from the classic minus.
Ruth Schäfer: The number of invisible events that we would observe is given by the number of total these types of branching ratio into our production.
Ruth Schäfer: times the efficiency times the number of times that the of the case Berlin wanted already are the detector so that is the probability that the author still stable at the actual detective.
Ruth Schäfer: I should point out here that this car isn't necessarily the same as this one.
Ruth Schäfer: As.
Ruth Schäfer: The tracks in different parts part of the detective system may not be enough to see nuance but may already be enough to say the smart deliverable.
Ruth Schäfer: Now How did we make this analysis How did we try to separate.
Ruth Schäfer: The signal out from the background.
Ruth Schäfer: What we did is we.
Ruth Schäfer: first thought about Okay, what is this the initial decay process.
Ruth Schäfer: What are its most important variables, neither the momentous occasion at the office.
Ruth Schäfer: But the momentum it's beyond it's not something we can see.
Ruth Schäfer: So what we did is we, we chose to use the missing momentum that the detector can see as a proxy for PR.
Ruth Schäfer: and based on that we chose three variables subscribe process, which is the transfers momentum of the kale the opening angle between the two mentor and we reconstruct the team as a mass from the K on momentum and the proxy for the appointment.
Ruth Schäfer: Now there's not usually just one K on in a process.
Ruth Schäfer: And so to choose the right chaos.
Ruth Schäfer: We also have to choose a proxy, and for that we use the K on with the highest teaching That means of course that we have some rate of wrongly reconstructed events where we choose the wrong town.
Ruth Schäfer: Now we made.
Ruth Schäfer: a bunch of events.
Ruth Schäfer: to explore the sun.
Ruth Schäfer: And these are the events are required for the signals, that is to say, all of these events have a bk a process.
Ruth Schäfer: And the solid line, you see, is the the values for the for the three variables folders process, whereas the dotted lines are what we see for the difference.
Ruth Schäfer: Miss reconstructed.
Ruth Schäfer: versions.
Ruth Schäfer: And you can see that.
Ruth Schäfer: The the signals lie relatively close together, especially the the low, the low mass ones.
Ruth Schäfer: which can make this thing at first that this may be very nicely separable from a background so next we should have a look at what the background looks like.
Ruth Schäfer: The comparison between the segment the background, here is an arbitrary units.
Ruth Schäfer: And we can see that the right the team, indeed, to be regions of parameter space where where the shapes are definitely different.
Ruth Schäfer: backgrounds, that we have here and but the ones that we've looked at in this paper or the production, a plus or minus two towels to like pets and to be marathons.
Ruth Schäfer: Now.
Ruth Schäfer: Based on based on this and based on the law but firenze off.
Ruth Schäfer: variables with made a company based analysis to.
Ruth Schäfer: To introduce paths to best separate.
Ruth Schäfer: The signal from from the background and here you can see the backwards and black that is left after we place the cards in the.
Ruth Schäfer: In the third direction in each of these plants need to see, for example in the slot that most of the background that is left over, after the cut and.
Ruth Schäfer: The PT direction seems very well separated from this era where we take the signal to be, and the same is true in these other two cases to but it turns out, there is an amateur background that is still left over after loss analysis.
Ruth Schäfer: Which which speaks for a more.
Ruth Schäfer: And more involved experimental analysis with more variables, but still taking this background production that we found.
Ruth Schäfer: We make bounce.
Ruth Schäfer: and comparing with the bar search PTK new new that we reinterpret it for our ups.
Ruth Schäfer: And for different.
Ruth Schäfer: For different amount of time with our team Aaron 0.5 and was autobahns about we're about to do that, right now, where it's 15 minutes at upon is the initial goal melting.
Ruth Schäfer: down here the dotted line that we have is for.
Ruth Schäfer: Instead of assuming the background that we still have left after our analysis assuming we could completely reduce.
Ruth Schäfer: And now it's probably best to compare this with what we've had and we find that.
Ruth Schäfer: The best invisible mind that we find about it.
Ruth Schäfer: and
Ruth Schäfer: is significantly stronger than.
Ruth Schäfer: This these display spans we have up until the point where a where we get to higher masters, and this is due to the fact that, as you may remember here for higher masses, we have.
Ruth Schäfer: We are variables, but of different country different so if we wanted to specifically high mass analysis, we might be able to.
Ruth Schäfer: And proof improve our invisible search here too.
Ruth Schäfer: But the the pretty much the two populations, we have a lot to continues to be a very good detective for long of particle searches and.
Ruth Schäfer: invisible searches, even though they require a lot of very elaborate like cuts and analyses.
Ruth Schäfer: have consistently very high potential for for searching for longest particles.
Ruth Schäfer: But that doesn't mean that we shouldn't look into this place, such as last because, in addition to that, the potential for final test from the space.
Ruth Schäfer: They will also be much more useful for characterizing peacefully happen, and of course this is not a general statement, the statement that that may vary from different models and also different detectors.
Ruth Schäfer: Thank you.
Margaret Susan Lutz: Thank you so much.
Margaret Susan Lutz: And I see that we already have a question from Mike.
Michael Albrow: yeah we have a lot of hardcore, namely the K zero you didn't discuss K zero background.
Ruth Schäfer: And that is true.
Ruth Schäfer: So.
Ruth Schäfer: And we have in our.
Ruth Schäfer: Allah simulation of particles here.
Michael Albrow: produces.
Ruth Schäfer: Actually case arrows um.
Ruth Schäfer: But as far as I remember.
Ruth Schäfer: um we have the decay programmed into the simulation.
Ruth Schäfer: So they are, they are part of these backgrounds, we haven't dealt with them specifically.
Michael Albrow: it's me it's the one.
Michael Albrow: How many cakes how many charged counts do happen in the total sample.
Michael Albrow: to know how many chart counts, because I imagine you have a similar number of a neutral counts.
Michael Albrow: And they have a disk space vertex which can be centimeters.
Ruth Schäfer: that's true but, so the.
Ruth Schäfer: As far as I remember, and i'm sorry that I I complicated more precise onset is that this should all be part of this background, and since we the detective size, we have is around a meter and anything that the cage within that.
Ruth Schäfer: We we take as part of this background, and we take as part of the calculation for the for the lesson momentum.
Ruth Schäfer: So we should take that all of that even the displace things we should take into account.
Ruth Schäfer: In this intrusive search, so if we have a decay up here that still goes into our our assumption for the invisible vector that makes sense.
Michael Albrow: Okay well anyway, I mean it's good to see to see because zero signal and that's good but that'd be convincing if you see the case here, a signal vendor lifetime and so on, so forth, but a entrust Okay, thank you.
Margaret Susan Lutz: Okay, thank you, Michael I think we have time for video very, very fast quick um so.
Susanne Westhoff: yeah Thank you it's, not even a question, I just wanted to comment, a bit more on this case, your rooms i'm puts a collaborator on the project, and so the main point here is that, in addition to the displaced art or the invisible rp also requested charged K on the dis associated with.
Susanne Westhoff: It and this basically reduces background from long lift case euros by a lot, so we specifically use as a squat described it.
Susanne Westhoff: The kinematics that characterize the two bodies decay of a D plus into a K plus.
Susanne Westhoff: Plus along lift it, and that is very characteristic that is also very different from the standard model three body, the case, the plus two K plus and YouTube neutrinos.
Susanne Westhoff: And the case heroes are included in our background simulations but in the end, they are not the dominant backgrounds that remain after applying these kinematics election requirements.
Michael Albrow: Okay, thank you.
Margaret Susan Lutz: So much for that extra extra explanation and of questioning us as questions, please feel free to shoot us channel, and I can combine to hand over to Julia.
Juliette Alimena: hi okay great next up, we have probably going to butcher your name i'm really sorry we will talk about long names like mediators some higgs boson the case if they see FCC ah ah and proposal for dedicated LP directors, for the FCC AJ.
Juliette Alimena: Are you there you want to share some sites.
Yes.
Rhitaja Sengupta: Can you see.
Rhitaja Sengupta: Yes, yeah okay.
Rhitaja Sengupta: So hi everyone i'm i'll be discussing or work on Long live like mediators from expose on DK at a channel etsy and FCC ah ah, this is a work in collaboration with the proper touchy and shaky Matsumoto.
Rhitaja Sengupta: yeah so in the hicks portal, which is very well motivated both theoretically, as well as experimentally, the long list particles will have.
Rhitaja Sengupta: A dominant coupling to the standard model higgs boson and if these particles are lighter than half the higgs boson mass these can be produced from the exotic decades of the on Shell higgs boson.
Rhitaja Sengupta: So here we have considered a light scale mediator, which is motivated from a dark matter model, as it can solve the small scale crisis in the structure formation of the universe.
Rhitaja Sengupta: And this is the lagrangian for the scale a mediator with this term gives us the mixing between the mediator and the standard model higgs boson.
Rhitaja Sengupta: And this is highly constrained from experiments and this term here gives us the coupling of X two Phi Phi, and this is not severely constraints so far.
Rhitaja Sengupta: So, as we reduce the mixing angle, the lifetime of the mediator particle increases, given that the decay of the mediator to dark matter particles is kind of medically not feasible.
Rhitaja Sengupta: So this can also be seen from this bottom right plot where we show the lifetime of the mediator as a function of its mass for different values of sine theta in this minimal model.
Rhitaja Sengupta: So now where to look for the lps in this work, we have focused on the mian spectrometer, since it is the least affected by pilot being the farthest detective from the interaction point.
Rhitaja Sengupta: And it also has a large volume which compensates for its distance from the interaction point is also sensitive to multiple DK modes.
Rhitaja Sengupta: Like even apart from yawns, even if the media to indicates to had drawn final states, at last, can reconstruct the space what he says in the beyond spectrometer.
Rhitaja Sengupta: And cms can look for cluster of hits in the north spectrometer coming from the introduction of electrons protons and electrons with the eye on your explicit.
Rhitaja Sengupta: So both these experimental collaboration atlas as well as cms have put enormous efforts in.
Rhitaja Sengupta: searching for llp is in the middle and spectrometer and we use these studies as a very inspiration here So here we actually.
Rhitaja Sengupta: do a study the sensitivity of the cms neon spectrometer at a channel etsy and Amazon spectrometer of FCC ah ah.
Rhitaja Sengupta: Now let us look at this plot in the bottom right of the slide where we show the distribution of the decal and in the last frame.
Rhitaja Sengupta: For mediators of fearing masses and lifetimes and here we can see that, after around a few 10s of meters at last and cms main detectors start losing their sensitivity and then.
Rhitaja Sengupta: This dedicated llp detectors will play a crucial role, so we also studied their sensitivity and we focus on the transfers detectors because, in our case, the mediators are mostly centrally purchased.
Rhitaja Sengupta: So for the Channel at we focus on the models land could expect detectors and for FCC ah ah, we propose a new dedicated llp detector which we call the delight.
Rhitaja Sengupta: So our analysis strategy for the gays in the mian spectrometer includes triggers based on both prompt objects, as well as displaced objects, so let us begin with the prompts objects, here we use a.
Rhitaja Sengupta: Prompt objects coming from the production mode, it can be, I suggest from guang guang fusion or the two for widgets from the vegetables on fusion or the prom ticket products of the.
Rhitaja Sengupta: vegetables ons in the vhs production mode, so the first column here corresponds to the set of cuts as and these has been taken from the face to cms l one trigger menu.
Rhitaja Sengupta: And we also use another softer set of cuts, assuming that thresholds on the prompt objects can be reduced in the presence of displaced activity in demand spectrometer.
Rhitaja Sengupta: Now, before we discuss the triggers or selection criteria based on the displaced objects, let me mention one thing.
Rhitaja Sengupta: That interface the particles are propagated in the presence of magnetic fields till the end of the tracker.
Rhitaja Sengupta: And we have implemented it till the end of the moon spectrometer which we needed for this study, where we are dealing with both both boosted, as well as displaced mediators, which can actually.
Rhitaja Sengupta: In the absence of magnetic field there will be there might be problems in the isolation of the DK products so continuing with this displaced objects triggers.
Rhitaja Sengupta: We have performed analysis for various decay, most of the mediator and we have studied a range of llp masses between Point five g to 60 jv and wide range of lifetime's.
Rhitaja Sengupta: So let's start with the displaced leon's case where the media to particle the case to to millions and here thanks to the cms triggers for the standalone.
Rhitaja Sengupta: nuance there, it does not need any matching to the inner detector hits for the means we can we do not need to restrict the decay is anywhere in this.
Rhitaja Sengupta: In the detector and there we can use some impact parameter costs as well as the dt cuts on these on the display secondary vertex and we performed this analysis.
Rhitaja Sengupta: And for the for anything else, decaying I mean for the media to dig into anything else other than the neon.
Rhitaja Sengupta: We need to restrict the the case to the mian spectrometer because if the mediator decays prior to that.
Rhitaja Sengupta: They will the final states will be depositing energies in the calorie meters So here we of course restrict the decay, to the Ms and.
Rhitaja Sengupta: Since we are following cms be required, the energy associated with the llb DK to be.
Rhitaja Sengupta: Above some threshold to ensure that we have enough number of hits in the middle spectrometer.
Rhitaja Sengupta: In addition, we also put a cut on the charge number of charged particles associated with this displaced secondary vertex to minimize the background from standard model, long live particles like a show.
Rhitaja Sengupta: And so, in both of these cases, we consider a harder, as well as a softer set of cards, and then we combine these in this four sets of cuts which we finally use for owner for over.
Rhitaja Sengupta: This So the first one is just a hard set of cuts on the displaced object and we just require one at least one vertex or one cluster for.
Rhitaja Sengupta: In the events and the second is demanding to such displaced activities and this this is expected to have significantly lower background roots, but the signal efficiency will also.
Rhitaja Sengupta: Get affected the third possibility is to combine a prompt set of a prompt object, with the heart set of cards and and then relax the cuts on the displaced objects.
Rhitaja Sengupta: And the fourth one is a more optimistic one where we relax both the prompt, as well as the displaced set of cuts and expect that still this combination is enough to keep the backgrounds in control.
Rhitaja Sengupta: So, in all of these cases, we as human observation of 50 events and put some limits on the upon the branching ratio of X two Phi Phi so fears you 100% dickie of the mediator to nuance.
Rhitaja Sengupta: We can go up to 10 to the power minus six for media mass of 60 gv and the most sensitive limit concept around Point five meter and similarly for bb bb.
Rhitaja Sengupta: We can prob up to 25 minus five and the most sensitive sita value here is five meter.
Rhitaja Sengupta: So what we have done is we have present it limits as human hundred percent branch into each of these decay modes and also we have combined these.
Rhitaja Sengupta: as per the branching of the minimal models that we discussed and the present at such grids, where we showed a lifetime and mass of the mediator and the color bar shows the upper limit on the branching of X two Phi Phi.
Rhitaja Sengupta: Now here we can fix this extra five five branching and then the limits on seat, or can be translated to the limit on the mixing angle, scientific, as shown in this plot.
Rhitaja Sengupta: So next be considered the case in a dedicated will be detectors like moto slot and codecs be, and these have considerably less amount of background, so an observation of for events is assumed to be enough.
Rhitaja Sengupta: And this box shows the typical numbers of the upper limit on branching that can be achieved in these cases for some typical media to masses and lifetimes.
Rhitaja Sengupta: And this plot here actually shows the combat complementarity of the cms now spectrometer analysis under Methuselah analysis and we can see that actually these two can probe a lifetime of.
Rhitaja Sengupta: Around 10 to the power five meter for immediate a mass of 60 gv without any gap, given the branching of X two Phi Phi is greater than or similar 2.1%.
So.
Rhitaja Sengupta: So for the FCC ah ah neon spectrometer we have performed similar analysis, like the cms one and.
Rhitaja Sengupta: yeah so here are the results can be found in the paper, but I would like to draw your attention to two interesting points.
Rhitaja Sengupta: So let's focus on this block which shows the pseudo rapidity distribution of the Long live Mediator for particles.
Rhitaja Sengupta: Which are restrict when when we restrict the decaying them within the mass spectrometer and here you can see that this blue line which corresponds to a mediator mass of 50 GB and a shorter lifetime of point one meter.
Rhitaja Sengupta: After putting this cut of decay within them you on spectrometer it is.
Rhitaja Sengupta: More I mean it is populating more in the forward direction and that is because it has no lifetime, so it has to have boost to reach them on spectrometer which it is getting in the forward direction so.
Rhitaja Sengupta: Fortunately, the FCC hh reference detector has this forward me on spectrometer and that actually helps in increasing the sensitivity to newer decay lens which otherwise would have been difficult, you to more background, if he had to search for these in the tracker.
Rhitaja Sengupta: Another thing here, so what is the expectation, I mean what an improvement, we expect from going to 14 TV collided 200 TV collider so we have a cross section increase by a factor of 15.
Rhitaja Sengupta: and integrated luminosity is expected to increase by a factor of 10 so we expect if deficiency remains the same, a factor of about 150 improvement but, so this is 100 TV collider so we might need to put a stronger thresholds on our PT cuts.
Rhitaja Sengupta: Due to huge amount of pile up, and so we do this exercise here that we keep on increasing the PT cut and see how the improvement degrees with.
Rhitaja Sengupta: With this exercise also, since these are in designing phase, we can think of higher granular detector so that we can reduce this delta Phi codes so basically the reduction comes from this delta Phi cut, and this can be actually.
Rhitaja Sengupta: retained if we make it more granular so that the identified cut can be reduced.
Rhitaja Sengupta: And finally, we propose.
Rhitaja Sengupta: detector dedicated for llp for the FCC ah ah, we call it delight detector for long lift particles that high energy of hundred TV and since ssh is.
Rhitaja Sengupta: still under study there's much room for optimization and since our mediators are mostly centrally produced we.
Rhitaja Sengupta: propose to place this detector X equal to zero at a distance of around 25 meter and we discuss three benchmarks of different sizes and this here we show the result for this.
Rhitaja Sengupta: Third benchmark, which is tries to decay volume of moto slow and we can see an improvement of by a factor of around 430 and since it's a longer detector so this delta why shorter, so we expect better shielding against cosmic rays and being closer to the interaction points might.
Rhitaja Sengupta: need some more studies to reduce the background at 25 meter because hundred TV cool idea we have more and more backgrounds and also since it's closer, we can think about integrating it with the trigger system have access to all of these are under further steps.
Rhitaja Sengupta: So that brings me to the summary so in this work, we have studied the landscape of long live like mediators.
Rhitaja Sengupta: The exotic decays of standard model higgs boson using the cms know spectrometer and my tesla and score big speed at the lexi.
Rhitaja Sengupta: And the cms spectrometer both transfers and forward at FCC ah ah, and you also study or new proposal delight in light of the ssh.
Rhitaja Sengupta: and other interesting thing is that we have here combined the dominant production, most of the higgs boson and multiple GMOs and this actually gives a comprehensive research, so if you for further details, you can have a look at this paper, and thank you.
Juliette Alimena: Thanks very much very interesting comments and questions.
Juliette Alimena: Maybe while people think of one or two, I can ask a quick one, so this delight proposal is really interesting I think there's also another proposal for an external detector but it might be FCC he, as opposed to H h.
Juliette Alimena: Which is the active detector Are you familiar with this do you have any idea of.
Juliette Alimena: How they would compare it or if that's fair to compare them.
Rhitaja Sengupta: yeah so we came across this paper after we wrote it but yeah it's a very interesting proposal and it.
Rhitaja Sengupta: Plans to cover one window with rbc suits it can have a full coverage delight, however, will be more like Methuselah so it will have limited solid angle coverage.
Rhitaja Sengupta: But it's uh yeah I mean at this point it's difficult to say how this would both would compare but yeah it can be an alternative proposal for the FCC he.
Juliette Alimena: thinks, I see a question for Michael.
Michael Albrow: yeah and these searches for looking for decay inside the material, I can mute spectrometer so I was worried about.
Michael Albrow: Hygiene neutral interactions making a forward shower that looks like a decay, so that is seems to be a background, but when it has to cope with it.
Michael Albrow: For rare events but.
Michael Albrow: Generally doesn't seem to be taken very seriously, I wonder why.
Rhitaja Sengupta: So here actually yeah so being a phenomenal logical study, here we have been mostly not thinking more about the simulations of backgrounds, but I have a slide here in the backup.
Rhitaja Sengupta: For backgrounds, but are you referring to this punch through jets of pile up, I mean there are some neutral particles or charged particles even can.
Rhitaja Sengupta: punch through the perimeter material and reach them on spectrometer and give him.
Michael Albrow: Yes, I mean they don't have all the way from the collision point, but there are even in the back of a thick absorber there are case errors and neutrons coming out to the bank showers they're not primary but their secondary or tertiary and they and they may interact on.
up, I mean.
Michael Albrow: For events, the things other than candy K so.
Michael Albrow: While the facet project, maybe you'd look at that, I mean because it's a small side angle, we have much fewer events than a central intact, but on the other hand, even three events could be a signal, because there's no background in a vacuum decay that's.
Rhitaja Sengupta: Yes, no yeah I agree, and since we are not doing a proper simulation of backgrounds, we have actually kept our limits are very conservative and we have demanded.
Rhitaja Sengupta: 650 events so that even a significance of two Sigma can accommodate.
Rhitaja Sengupta: Around 625 background events but yes careful study of the backgrounds, need to be done here, and then we can scale our limits accordingly yeah.
Michael Albrow: Thank you agree.
Juliette Alimena: Okay, great Thank you and I think in the interest of time, we should move on and further questions can be asked on matter most.
Juliette Alimena: And okay great next we have Phillip talking about factors factorization hidden particle production rates.
Yes.
Klose, Philipp Mauritz (ITP): Can you see me, yes, good perfect yes.
Klose, Philipp Mauritz (ITP): So I hope everybody.
Klose, Philipp Mauritz (ITP): is going to enjoy the talk, I will share the screen.
Klose, Philipp Mauritz (ITP): Can you all see the screen.
Juliette Alimena: Yes, I can great.
perfect.
Juliette Alimena: yeah.
Klose, Philipp Mauritz (ITP): So it seems to work well okay perfect so i'll just start I guess.
Klose, Philipp Mauritz (ITP): Yes, so good afternoon everyone, thank you for attending my talk.
Klose, Philipp Mauritz (ITP): My name is Phillip closer and reconstruct at the University of pan and i'm going to talk about factoring hidden product production rates and how I think they might be used this may be useful for.
Klose, Philipp Mauritz (ITP): constraining hidden sectors in a somewhat model independent way okay so well, of course, why do we care about model independent constraints and hidden sectors.
Klose, Philipp Mauritz (ITP): I mean, as you're probably aware there's this huge variety of viable hidden sector models as like actual light particles like X particles have a neutral leptons this very stark matter candidates it's.
Klose, Philipp Mauritz (ITP): A very rich field, and so, of course, you know it's not always easy to see how constraints that may apply to one model can be adapted to apply to another model and vice versa, so there's some inherent used to.
Klose, Philipp Mauritz (ITP): use to having some model independent constraints, because this is the case with a lot of work has been done.
Klose, Philipp Mauritz (ITP): trying to get this using eft approaches or simplified approaches and it's been overall quite successful.
Klose, Philipp Mauritz (ITP): But it's not perfect, when for simplified models of course of usually you have like maybe one hidden sector particle and then the mediator.
Klose, Philipp Mauritz (ITP): and for your tissues usually take a stand on your extended by adding maybe a dark matter candidate or an excellent article, so this overall the the hidden sectors that you kind of.
Klose, Philipp Mauritz (ITP): Look at with these kind of techniques typically tend to be rather actively symbol.
Klose, Philipp Mauritz (ITP): And perhaps what of natural question is is, we can we be a bit more general can we look at maybe more complicated hidden sectors, maybe with a few more messengers a mediator particles.
Klose, Philipp Mauritz (ITP): And I think that the factorization that i'm going to talk about useful and in some ameliorating some of these issues are some of these difficulties me Okay, so how does this work so just just.
Klose, Philipp Mauritz (ITP): Cheese so i'm considering a model that looks like this with following around and you put some animal art and.
Klose, Philipp Mauritz (ITP): we've got some incentive part, of course, then you've got this portal operators right, so the portal operators, they consist of star more important, which side note here in blue.
Klose, Philipp Mauritz (ITP): And then some hidden sector part which I do know that the beam.
Klose, Philipp Mauritz (ITP): And all of this, I like to think of this as like an effective theory lab on it so we've integrated out all the heavy particles in your theory and then.
Klose, Philipp Mauritz (ITP): The hidden sector, the standard model contain only those particles that are relevant at this energy scout that we're looking at.
Klose, Philipp Mauritz (ITP): And the trade off is that we have some higher dimension operated that you also have to include in the theory and but the setup is of course very general, because that way we include both light new particles and Happy New particles, at the same time and it's very fortunate because.
Klose, Philipp Mauritz (ITP): We have it turns out that if we have a very small portable coupling which we need to have in order to be consistent with sort of current experimental constraints.
Klose, Philipp Mauritz (ITP): The smallest of the bottle coupling by itself is already enough to ensure that there is a factorization happening in.
Klose, Philipp Mauritz (ITP): Hidden particle production rate so here you have an expression for.
Klose, Philipp Mauritz (ITP): Some generic production mode where you have some standard model particles that transition into some other standard model particles to notify sm prime.
Klose, Philipp Mauritz (ITP): And addition some new products, so this could be either DK or some scattering or it could be DK associated with some time or part of a production facility in sector production.
Klose, Philipp Mauritz (ITP): And the rate for this process in general will decompose into some reduce matrix elements here in the blue m.
Klose, Philipp Mauritz (ITP): There are some model independent independent standard model of physics.
Klose, Philipp Mauritz (ITP): And this in current correlation matrix which depends only on hidden physics, and so, in particular, this means that it is independent of what kind of initial states diameter particles and final steps, done a lot of articles.
Klose, Philipp Mauritz (ITP): We have anything or sooner, in a sense, this sense it's kind of observable independent.
Klose, Philipp Mauritz (ITP): And one thing to note here is that of course if we just look extra operates, excuse me, and so we know what kind of standard behalf and start modeling we have.
Klose, Philipp Mauritz (ITP): We know what kind of state, we have in the hidden sector, then.
Klose, Philipp Mauritz (ITP): We just have these two hidden currency but, in general, since the sector as well it's hidden, we have to integrate over different types of particles felicity space space and so on.
Klose, Philipp Mauritz (ITP): And this something in integrating was a mix the two hidden current so in general we don't have them appearing individually in the rate, but there will be some hidden current correlation matrix is jd that I wrote there and.
Klose, Philipp Mauritz (ITP): I think that some of this factorization is quite useful So the first thing that immediately, so I think is apparent is when you have.
Klose, Philipp Mauritz (ITP): This kind of rain and you have this factorization that makes it easier to sort of adapt array to a new model or two new service, on the one hand, if you have an existing range and your model builder you want to.
Klose, Philipp Mauritz (ITP): adapt this rate for constraint for this observer to some new model you don't have to recreate the witches medical elements because they're all independent.
Klose, Philipp Mauritz (ITP): They only have to re compute the hidden currents.
Klose, Philipp Mauritz (ITP): And on the other hand, if you have some new observable that you want to look at and you have an existing model.
Klose, Philipp Mauritz (ITP): We don't have to read compute the hidden currents because well, they have the same they don't depend on the model that you're looking at and you only have to compute these we just matrix elements.
Klose, Philipp Mauritz (ITP): So I think that is quite a useful thing and then the second thing is that well so far we have not talked really about what kind of operators, you can have in the portal or grounded right.
Klose, Philipp Mauritz (ITP): And, depending on what kind of operators have you have you will have different views matrix elements, you would have different written currents, but in general, you can just write down.
Klose, Philipp Mauritz (ITP): list of portland directions right, you can using certain assumptions, maybe assuming some cemeteries, you can write sort of a portal effective theory.
Klose, Philipp Mauritz (ITP): That encompasses all the relevant portal operators that can potentially contribute to the process you're looking at, and if you have such a complete basis.
Klose, Philipp Mauritz (ITP): Then you can use this factorization to obtain of model independent master formula for this decay rate, and this also means that you can then have some model independent constraints on these hidden currents.
Klose, Philipp Mauritz (ITP): And with these model independent constraints on these are the hidden currents if you're armed with that you can surf like easily or relatively easily I think compare and contrast different models because.
Klose, Philipp Mauritz (ITP): You just look at the predictions for the hidden costs if you haven't one model versus another model, maybe like an actual like particle versus like a spark.
Klose, Philipp Mauritz (ITP): And they will have different predictions, but in terms of what the hidden costs look like, but the constraints on the hidden currents, they will be just model independent predicted by the experiment of the depend on the experiment that you're looking at.
Klose, Philipp Mauritz (ITP): Okay, so this is all very nice but it's a bit abstract, so I wanted to also show kind of what this looks like and some more concrete terms and for to do so, I want to look at this I.
Klose, Philipp Mauritz (ITP): want to do this, this computation for this master eight, for example, process or the process that i'm looking at georgetown the case into charge laptop or some new physics.
Klose, Philipp Mauritz (ITP): And the reason why I chose this process is because it's quite simple there's only two portal operators but it's not entirely trivial right there's the two portal operators and this allows us to see some interesting features so first of all from the portal operators, you can.
Klose, Philipp Mauritz (ITP): there's a process away, you can get some corresponding otter vertices.
Klose, Philipp Mauritz (ITP): And these vertices essentially they function like regular vertices except that there's some missing mass So if you look at like want to compute something like a reduced matrix elements.
Klose, Philipp Mauritz (ITP): This which is majors lemon you compute this using the standard final rules that you use for everything else, except that at some point there's this portal vertex that carries off some.
Klose, Philipp Mauritz (ITP): momentum into the hidden sector and you don't really further care about what happens to this momentum for the purpose of computing to resubmit this these reduced matrix elements.
Klose, Philipp Mauritz (ITP): And on the other side if you're looking at the hidden currents again there's some they could get computed basically in the same way as normal matrix elements, except that at some point, you have a conjugate in vertex.
Klose, Philipp Mauritz (ITP): were some you have some influence momentum right that comes from the visible sector, but for the purpose of computing these hidden current.
Klose, Philipp Mauritz (ITP): You don't really care what has happened on the hidden on the visible sight to produce this in flowing missing mass OK, and then, once you have this portal vertices.
Klose, Philipp Mauritz (ITP): Then you can use standard fine rules to come to sort of compute the we just waited elements in this case here, we have to reduce matrix elements, one for each of the potter parents.
Klose, Philipp Mauritz (ITP): A portal operators and then because we have to which is matrix elements we also have to hit and currents and then, once we do this, this faith based integration, this will lead us give us.
Klose, Philipp Mauritz (ITP): Three hidden current correlations so I mean you might think it's true before because it's a two by two matrix but this matrix has to be symmetric or that actually has to be permission.
Klose, Philipp Mauritz (ITP): And so there's only three hidden current correlate as well, but for and then what we find in the end is this this result.
Klose, Philipp Mauritz (ITP): So where we have the generic rate for producing some hidden sector particles and what I want to stress that this is it rained for producing.
Klose, Philipp Mauritz (ITP): An arbitrary number of particles with generic sense so it's really a very general result.
Klose, Philipp Mauritz (ITP): And then, of course, because this depends on the kind of missing mass that you have right, you will have different rate, depending on what the same as you have.
Klose, Philipp Mauritz (ITP): This actually like a differential with where you have the width per some been of missing mass and you can just basically, I mean I guess the result in itself is not super spectacular because you just find that you can basically paradise in basic terms of.
Klose, Philipp Mauritz (ITP): In terms of form factor F of X, but the kind of the meat of the formula ISM is that you can then you have these model independent constraints on the on the form factor.
Klose, Philipp Mauritz (ITP): and using the financials to compute these different areas occurrence, you can sort of relatively easy then compare contrast different sector models like you can.
Klose, Philipp Mauritz (ITP): compute them for some html or something more specific and then you can see, out of immediately what is model independent constraints on F say about the different parameters in various models.
Klose, Philipp Mauritz (ITP): Okay, so to summarize.
Klose, Philipp Mauritz (ITP): The first thing that I did in the paper is like we showed this I showed this call.
Klose, Philipp Mauritz (ITP): As factorization and I argue that using this factorization you can more easily adapt rates to new models and you observable and if you combine the factorization with some causal effect of theories, then this allows you to.
Klose, Philipp Mauritz (ITP): Relatively systematically compute model independent constraints on certain well on on hidden sectors that you can then also in the second step.
Klose, Philipp Mauritz (ITP): used to.
Klose, Philipp Mauritz (ITP): Set relatively easily compare different hidden sector models and to show how this works in practice I computed this most general kalan to charge 250 K range where you then have this.
Klose, Philipp Mauritz (ITP): form factor F of X and then also in the paper I also derived some model independent constraints on F of X by reinterpreting.
Klose, Philipp Mauritz (ITP): An existing search from any 62 Okay, and so, then this is all I think very nice, but this I mean so of course there's still a lot of work to do so, one thing.
Klose, Philipp Mauritz (ITP): That, I would like to do in the future is, I would like to extend this kind of description to systems with.
Klose, Philipp Mauritz (ITP): Hidden particles in the in the initial stages, so you can have maybe some some situation where you can think of, like a hidden particle scattering of a phenomenal article.
Klose, Philipp Mauritz (ITP): Or maybe to find that temperature situation so that you can apply this not just to collider physics and fixed target experiments, but maybe also to some other use cases, maybe something in the universe.
Klose, Philipp Mauritz (ITP): And then the other thing main thing to do, of course, is to use this factorization compute lots of production rates and hidden currents for various models so ideally, I would like to have some libraries have.
Klose, Philipp Mauritz (ITP): Pre existing results for which is matrix elements for certain observable and hidden currents for various models so people can just mix and match these things if they want to hey thanks for the attention.
Juliette Alimena: Thank you very much, questions.
Juliette Alimena: Oh, I thought Jose on YouTube and I didn't couldn't hear you.
José Zurita: Now sorry I was trying to block my child, while I am muted.
José Zurita: So the the thing I wanted to ask is I think it's a very nice language to essentially write down everything in terms of currents and then and then try to see if you could use those tools to put bounce.
Klose, Philipp Mauritz (ITP): But it is.
José Zurita: always going to happen so imagine that that you do let something like a fabric, for a refinance or do you look for something in outer space where there are certain processor you don't have a colliders so, is it.
José Zurita: Or you the sinus cavity that look for back doors, but it doesn't work for the scales of preparing meals, because you do one will ever catch or something like that, but you see it always obvious that.
José Zurita: an experimental research, coming from a spiritual involved certain selection cards and so on can be put always sort of model independent way in this language so for sure theory predictions can, but the know when you want to do them up to strike from data if if this will be failsafe.
Klose, Philipp Mauritz (ITP): So I think I mean so in order to have this this factorization I mean, I guess, I mean we can paraphrase your question to see find a standard so you're asking if this factorization how general this factorization is I guess right what.
What are the limits.
José Zurita: But yes, partly mostly the was applicability for data right for theory, I have no, no, no, no issues with with the proposal.
José Zurita: But then, if you take a given amount experimental late and you want to.
José Zurita: put it in this language and being fully modern independent how how well this will work.
Klose, Philipp Mauritz (ITP): I think, so I mean, for example, if you have a missing mass search, then you immediately, I think that should work for because you're in the missing mastered right you don't see the hidden particle you just see something leaving the detector and.
Klose, Philipp Mauritz (ITP): So then, of course, if you have something that became within the detector.
Klose, Philipp Mauritz (ITP): On the one hand you've got the production rate which.
Klose, Philipp Mauritz (ITP): I would argue here, you can.
Klose, Philipp Mauritz (ITP): sort of probably cost in this model independent wait, but then you will also have to think about the details right.
Klose, Philipp Mauritz (ITP): And so what i'm doing here is at the moment, only looking at the the case at the production of the in particle but not in the.
Klose, Philipp Mauritz (ITP): structure for this part of the reason why I would like to look at situations, but you have also hidden particles in the initial state, because then you could.
Klose, Philipp Mauritz (ITP): This is my hope anyway so it's like describe both sides of this in a model independent way, but for the moment, this only applies to production so say you have.
Klose, Philipp Mauritz (ITP): I know you produce something like an excellent article.
Klose, Philipp Mauritz (ITP): In the detector and then you either have the actual like particle leave the detector entirely right.
Klose, Philipp Mauritz (ITP): Then this works or yourself.
Klose, Philipp Mauritz (ITP): Maybe you think okay all the accent like particles that are produced were to take will.
Klose, Philipp Mauritz (ITP): decay in the detector right this case you don't have to worry about what the rate is maybe you then there are some of the pendants coming in from the punctuations and UK side and so on, but so it depends, I think the month I think so.
Klose, Philipp Mauritz (ITP): For the moment, I would say, the most important thing here is that.
Klose, Philipp Mauritz (ITP): You can apply to data in situations where the production rate is the most important thing that you're interested in.
José Zurita: Okay, now that makes sense that, for the cable need to think about Thank you.
Juliette Alimena: Okay, thank you.
Juliette Alimena: And I think I don't see any more hands, so, in the interest of time, I think we will close the session here and then go to the the coffee break and we restart at 327 time thanks everyone.