Hi everyone.
Welcome back.
1550 so I can get started. And so as Jim said before I think I'm Diana forgetting who, and we'll start with another talk about longer for me to leptons from gentlemen.
Hello.
Hey. Yes, hi.
So I will try to share my screen.
Okay, do you see this.
Yes.
Okay, great. Thank you. So, yes, so this is also concerning how many conductors, and today I would like to tell you about a work in progress, not yet public, but I'm happy to present some results on prospects for h&s with a new signature of our displays
shower.
So as you know, h&s can be nice.
But if the HTML has massive around the gv scale.
It has low enough make sense then it could be gay within certain regions of acceptance of hc the first.
as you heard in the biggest stuff so I'm gonna go further into the motivations, but just to comment on that. There's been recent LHCH not searchers both but by the artist and CMS.
And these were presented at this workshop. And in this searches.
It basically they consider triggers on problems, either little ones. And they require displays birthdays to identify with the signatures coming from the original DK but the case, we are missing, with the, with different flavors and the constraints are
a highly efficient in the electron you're mixing it plain versus hmm mass. So as far as we understand once we know the total mixing. It's currently a sort of a delicacy No.
Discover. So what can we do, and this is a question. And that basically motivated the starting point of this idea which was presented us as no master of interest.
Unfortunately we we missed the deadlines, but I'm happy to show you some preliminary results in this store.
So, basically what we do to address the coverage of mixing with the channels, is to focus on a search that CMS has performed for large particles again in the CMS, and community in for them to them conditions.
So this search was highlighted actually also in the experimental overview talk at the beginning of the workshop, as our new or novel, a new such over the director handles.
So, this search. Originally is interpret in the context of summer Higgs boson began to nominate scalars which, and then the case of 72,000.
Now, is the unique features of this knowledge search is that it relies on the CMS neon and gaps at the director to be sort of like the sampling coloring.
And it says city, the searches sensitivity to showers for us by which the gate to find out stating doing hurdles, such as towels electrical photons but here we think okay maybe we can implement the same search, but dedicated for agent sales, which can
negate two towers, taking advantage of the properties backgrounds operations for DCMS steel shielding, which is particularly useful. In our case that we have a single lpk, and also due to the case.
The display shower signal to be efficient.
And this signature relies on on this variable that basically, it can can kind of count at Rohit multiplicity clusters of the Gaza Strip chambers heating system is the CSC.
So this is a picture of what what is the displaced shower signature from the CMS paper. So, this is a cluster of hits basic.
And now, in the past, lb workshop and Christina, Christina Warren presented the development of a delegate the deaths module.
And that is an actually similarly, I mean, this was an order to simulate the cluster of feats of the immune system that actor, a CMS. And so this is the, I encourage you to look at for bus stop here because we use this module, in order to reinterpret
the CMS search result. Now, in the original search at CMS also provides material for reinterpretation. They provide solutions deficiencies that we need to basically account for the 25 the cluster level selections, that, that, that, that we do.
And, and they also had some artillery interpretation that reinterpretation with you and can be, that's what we use all of that in our classic simulations.
So this is sort of the pipeline. And I'm just to comment that in order to do this, read the potential for HTML, we need the HTML energy and the generator level.
Under the positions, only the first interpretation. Now, this analysis originally treatise on net and requires at least one CSC cluster that capacity is defined modules where we have gasoline and gold in all the parameters function depending on the energy
and the K regions provided in the auxiliary materials the CMS search.
Now on the right, you can see our perimeter preliminary results on reconstruction efficiencies for the CSC blaster. And here we are showing two types of HTML so basically he now speaks in entirely with electrons.
This is what we call electron type HTML and 100% sort of mixing with dollars. And this is percent of here you can see how the efficiency of this, the gospel efficiency.
Right, it goes up as a function of the energy.
And as sort of reaches a plateau for energies around 400 days.
Now, we basically implement these straightforward recast to constrain the economics in verse must be but we also develop a or proposed two different of TV station struggles.
So, one of these first, but the key is to basically tighten up these and his guts, which is the main discriminate or variable and keeping the material.
So we basically to this end hits in order to suppress backgrounds, without rejecting too much signal, but we also propose a second strategy which relies in the potential use of a new dedicated displace trader plan to be implemented for run three.
And this is a trigger though was also highlighted in the review paper for the working group so I give you the reference there, and also these three The plan was presented in a previous energy worker at the seven version of these workshops, so I also want
to give to take a look at the stock. So basically this also sort of.
I think it's nice because it also addresses the challenge of displaced traders, and we basically lower our, the Macedonian odd analysis from 202 50 ev and increase this number of clusters.
And depending on the luminosity in their their choices for for for this path, and also optimize to control backgrounds and increasing acceptance. And we basically estimate, or three order of magnitude.
and a number of hits that the original CMS search will give us for a Chanel's.
Now, these are our results. So I comment on the downside ah now, as I mentioned, you can see in in the gray shaded area there is green experimentally excluded regions.
And in, in lighter corners like few callers their projections for proposed fire detectors.
And, such as face Sir Michael salon chief which sort of gives the envelope of the best sensitivity in this region, and all of our strategies in this work are represented the dash on solid lines.
So the straightforward request is presented in blue, we can see that we're not able to access much, much parameter space that is not already excluded but with the different optimized strategies, a start that you want, which is still rely on the same trigger
but it might seem that you can already see that we can reach sort of balance of the mix into total minus five for, let's say master so they Chanel between four and five touching bridges not already excluded, and for the displaced three or scenario, especially
on CD, then we can reach me since as low as five times 10 times seven, and eight nine masses between one answer of six. You got a combos, and this is complimentary to what I propose fire detectors can say about display, and also cover.
We basically show overarching in precise your regions of parameters face in the indigenous meeting with Dulce case. so I think this is it very nice.
Okay, so as I only had 10 minutes.
In time, I just want to give a summary. So basically we wonder, what was the discovery potential for HTML mixing without. And we identify that the previous CMS search this display shower signature can also would also be sensitive to each nails.
And this was the study was not possible if we didn't have a way to quantify the CMS cluster detector response, and we could do that because of their, their new delves, a tune or module.
And that is currently badly used to more than, the doctor for charts such displays shower signature. So we basically perform a straightforward, because of the, the search for new type of these the game in the CMS neon and cups.
And, in the context of the, of the HL scenario. We also proposed two different strategies, one basically doing guts.
With respect to the regional CMS search on also, another one that relies on a dedicated display streaker that could be implemented for run three of the Lexi, and we presented the sensitivity estimates focusing on Tomic seen taking advantages of these
high cluster efficiency for joining showers of research study.
And I think
it's very interesting and what him talk.
internally displaced showers.
Are there any questions.
Can I ask a quick question if there's nothing else.
I'm very curious did did you look at the sensitivity for other meetings as well.
Yes, this is very good question.
So we did in the back of my dog. Let me show you the results for the electrons.
And in
here. So, basically we explore mixes with electrons and towns, electrons, as you can see over some previously unexplored region from your space, But we knew it sir is tricky because we basically there is not enough public information, and for their interpretation
interpretation to, to sort of accurately estimate the sensitivity of the displays nuance, that would be gained the system so basically we'll leave that study for for the future.
Okay, thank you that make sense. Listen see sensitivity possible also the electrons that.
Yeah, the CNS such a sensitive to also electrons, like shower legs in the final stage so yes, but but the higher game that we identify is without particularly so this is why highlight things.
these are extra mana and automatic for the question.
And now we can move on to do a talk from golf and discreet flavor and CP centuries and gliders.
Can you see my screen.
Yes, I can see it's not full screen mode but I can. Okay, there we go. Thank you.
Thank
you. Thank you. So I'll be talking about displayed flavor and stupid cemeteries and its implication for collider searches.
So this work is in collaboration with the ball there at Washington University in St. Louis.
And this work appeared last December on archive, so you can take a look.
So to begin with, and to motivate the work.
So we know that neutrinos have monsters and the most common and simplest explanation is through addition of a right handed neutrinos to sand and model.
So, as other speakers have already discussed about it. But there's the darkness term for the neutrinos. And in addition, you have a Mariner Muslims coming from this case simulate of the standard model.
So you can have the in the flavor basis the, the mass metrics for these neutrinos as follows. And if the scale of this new physics, which is given by this.
Mr. is heavier than the MD, then you can have the following seesaw relation as it's called sense the lightness of the neutrino mass is explained by the heaviness of this new physics.
So, this can not only explain the neutrino masses by conscious on mechanical, but it can also lead to the generation of Barry on asymmetry of the universities are very attractive mechanical.
So usually, this parameters Mr NYD, they are three parameters and the theory, but we can constrain them by using flavor and CP symmetries. So I will not be going into too much mathematical details but I'll just try to motivate the work by some heuristic
arguments.
So, had some high energy scale we can posit that we have some discrete flavor symmetry group gf for the electron sector, and a supersymmetry group shown your SCP, and which at lower energies breaks down to this residual cemetery groups, shown here by
and G new respectively for Charles leptons and neutrinos. So for charge leptons this residual group is z three. Since the three leptons have different and distinguishable masses.
And we work in a business where discharge left on mass metrics is diagnosed.
So in that case, the contribution to the electron mixing matrix from the charge left on sector is.
It's just an identity matrix. So the whole of the PMS matrix contribution just comes from this group Junior, which determines the form of this mixing metrics.
So, given the generator of the group of the CP transformation and given here by x and the generator of this group Z of give z to even here by z, which basically generates this group.
Junior, we require that this.
This you cover matrix yd should be invariant under the action of this group, Gene you as captured by this equation, and also under the effect of the CP transformation journey generator given by x, this why they should go to yd start.
So once we have this ingredients under a little more which I'm not discussing here, but you can ask me after the talk, can change to a different basis by using a unitary matrix omega, which is basically we find by diagnosing this search and return.
You cover matrix violin my two by three times another rotation matrix in KL plane and parameters by angle theater.
Before I discussed a few other things in this relation. Let me also say that the PMS matrix in this scenario is given by this again by this unitary matrix omega times the same rotation matrix that you saw here rij parameters bangle Peter times.
Matrix Kenya, which is just a rephrasing matrix so it just takes care of the fact that when you're diagnosing the seesaw relation for the lightning general masses.
The neutrino Macias comes out to be real. So that's all it takes care of it's just a facing metrics.
So we see that, since the PMS matrix is known, we can just fit it to the currently experimental measured angles. And so this data L is in a sense, fitted and is unknown parameters so in yd this religion in YDT tile is known by one by two by three can
written in terms of the light nutritional masses of course is a function of the lightest neutrino mass and times this rotation matrix as a function of Qatar so basically this Friday is a function of data that is something I want to take a want you to
take away from this equation.
from this equation. So, moving on to the important part, so that the caveats of this right handed neutrinos at every level is given by this combination of this whitey dagger yd times the right handed, neutrino mass scale.
Since, one of the simplest cases, the DK which for this three right and in neutrinos are just function of this right and international mass Kill em.
And you covers and the data or the important one is this the decay rate for entry, which is here, geometry, so far as trying normal and strong inverted ordering which corresponds to the lightest neutrino mass to be zero in the respective ordering.
For example, in strong normal ordering you have by one equals 201 in strong inverted ordering you have by three close to zero. We can notice that if that happens, if my money goes to zero, then gamma three can tend to a value of zero.
If guitar takes on special values, which is pi over two and three power to for the strong normal ordering and zero and pie for strong and metadata and so these points are turned as enhanced residuals cemetery points.
So, these if the efficient production mechanism is available then these entities can be seen as long lived particles.
So here I've plotted the decline versus this parameter Tita are here we have assumed that the production of this right hand in neutrino takes place by decay of z prime will see later that we don't need an extra engage in like the plan for the production
efficient production of these right and in neutrinos.
So the Z prime masses set to 43, and four.
They can't have less than one centimeter, they can be seen as a prompt or displays vertex signature say also at LC, but beyond that they can be detectable at LLP searches.
But we see that definitely this entry becomes very long lift, and this ers, as shown here at pi over two and pi over to.
They also see that as the right hand industry no mass scale becomes higher, we see that this dependence on guitar becomes Natalie becomes sharply be similar for inverted ordering, and the only difference between on in normal and inverted ordering here
being the value at theta, which where you find the ers is different, which is zero and five for inverted auditing.
All of the results same remain qualitatively saying.
So, this was for strong and normal and inverted ordering but you might ask like what happens if your lightest neutrino mass is not zero. So, we see here that even when I'm not is not not is nonzero like for example 10 to four minus three EVVC that that
depends, the sharp dependence of having a long lifetime becomes less pronounced. But still, there is some reason that where it can still be seen at LLP searches.
So similar dependence remains for the inverted ordering case, I'm sorry here it's a typo should be ordering.
So we see that at these ers these entries can become long lived, but the point is, do we have a production mechanism through which we can actually see them.
Would they be appreciable number of events at colliders.
So for this we see that if we only have this type one scenario, and then the brilliant production channel is highly suppressed because there was a really small in our case.
So in that case we need to go beyond this minimal type once he saw to realize this sizable laptop number of violating signal.
For this we can embed the standard model in a larger guest symmetry.
And the most obvious like minimal and up complete extension, like where you would not need any more ingredients is, you won't be Marcel.
So in this the right hand and neutrinos are produced by the decay of this the prime, as I was discussing also in the decal and section and final visible signature is a four jets and two leptons and best thing about this signatures, is that you can have
the same sign developed on Channel signal, where you have, non to zero background also from standard models so it's really useful for my last plot and plotted here on the y axis the production cross section of the right handed neutrinos.
And on the x axis is this the right hand international mass scale, but given mass of mZ prime which is four, five and six TV and different center of mass energy.
So at LLC, and professionally 14 TV and feature collider center of mass energy hundred TV.
So, although the production costs section look really nice for the low mass range of this me for this right and industry knows but this should not be taken on the face value because this has done for the B minus and coupling of set to one.
So it's a normalized plot, but they are current constraints on B minus l toppling versus the MC Primus. So realistically, we see that for like center of mass energy 14 TV and empty promise of for TV, and the number of events will be actually less than
one so prospects become a little better if we have a higher the prime mass of like around 60 TV where we start to see like some on an order of 10 events and LLC, and for future collider for future TV collider the prospects are better even for the lower
z Primus, which can give up to like, 800 events. So to sum up my talk.
I had discussed that type of seesaw can generate material masses, and also the billion asymmetry of the universe.
Genetically It has three parameters, but it can be constrained through the use of flavor and CP symmetries.
So, the decadence of this heavy neutrinos does depend on this yd which are constrained through this flavor symmetries might exhibit this enhanced residue cemetery points at this ers points, this one of the writing and neutrinos become long lived and can
can be proved at a lengthy searches, and maybe the rest of the two can be searched why the prompt, or displays vertex signature subtlety.
And another important point was that efficient production requires going a little beyond type one seesaw. And it can be done easily by embedding in a minimal model like you won't be monitored.
Thank you.
Thank you very much, and that interesting talk.
Are there any questions.
Yes, I see arson. Yes. Hello, thank you for your talk, I have a question.
What What do you mean by the same hands to residual symmetric point, because I understand the symmetry of your neutrino mathematics is that true time CP, and that all the chatter select the mathematics is that three.
So I need to watch have been such a special ladies of art.
So, qualitatively you can understand like the $20 tends to this value the yd exhibit sexually a greater cemetery than what you actually put on it like it becomes.
Again, the second is that true or something like that. Yeah, so the yd has like a bigger cemetery and the group Zinio actually at this point so it's kind of like also can understand like a technical natural, because since, once you put this parameter
Also you can understand it's like a technical natural, because since, once you put this parameter to smaller values you get bigger symmetry in the leptons sector that we had positive, to be broken.
So in that sense, it's a little more motivated like okay, it might be also near this guitar and.
And also, yeah.
Yeah.
If I can add to because in UV complete theory you would expect probably some flavonoids today our life is breaking pattern that I think he assumed that scale of flavors symmetry breaking aside so probably you will never see them collide as much for Do
I actually have no idea about that because we were like, agnostic about the breaking of these districts symmetries like how they occur. So, I cannot comment on that.
they have potentially some interesting signatures as well.
Thank you for the question. No worries. Thank you for your talk.
Thank you. Thank you very much for the talk was for the question.
And I think we have time for one very quick question at the end.
If not, um, Thanks again so much for this nice presentation, and just refer me.
Your focus maybe, um, can you just make sure to upload the site so that people can purchase them later if they have anything they want to follow up on.
Sure. Thank you.
So next we have Isaac.
Presenting dark photons and displays vertices at the new on the experiment, going to go ahead and share a lot or whatnot, can you hear me. Yes.
Okay, I'm gonna share my screen.
Okay, anyone see your screen right now. Yes, I see the screen.
And now I see full screen so great. okay, well that's pretty good.
Okay Hello everyone, I'm going to stick well, I'm a PhD candidate at Rutgers University.
So this talk is based on a new paper with my doctor advisor David she and a postdoc in Ocala, in my university.
Basically, this is the motivation of why we're proposing this paper, we call it this place verdict searches on the more you experiment. And this is basically the motivation from the dark center because basically that light this place burning particles
can come up with the come from the particles, which usually plays a role as a darker mediator.
Since this is Anna LP workshop I was given this very quickly. I assuming everyone that has a somehow knowledge about us.
So basically said arousal can have connection with dark side or only via call sofa mediator but not directly interaction with dark sectors. So the mediators can basically in this mass rage and maybe MTV to gv mass range, and they can so that thing we
call, they are relatively light. And in particular, sometimes they're requesting so that it can be long lived right so they can reclaim their lives and then along the way, we call it LLP.
the word is this, so they're having interaction as the climate experiments in during Ragnar point and they're flying out, but since they're long live they fly out after some distance before they actually became became products.
And we call this far away, volume to be the decay volume and the LP can became this big evolving far away from the right point, and their decay product and if they're visible they can go to the directory and Stephen what are some signals.
So, they decay exponentially and this is so, so that this is their probability to decay in a so called ticket volume will be a minimal distance, tell me and from the interaction point of maximum business or Max, whether the bar of course it's the theoretically
expected to k l m p along of particles.
So, in the Middle East Parliament fastened experiment designed for measuring the elastic Nui scattering that's pure to end process. So I have a key level diagram here.
Remember that's a pure q Ed.
It says relatively low energy scale.
Does it general process, measuring the running corrections to this diagram is measuring the deep end over dt, especially the measuring the control and contribution to the running alpha which kind of which effectively have an impact on BB segment over
dt.
So, in order to measure this you ask this gallery, you all these designs, so that they have a very high resolution for the angle measurement of the outgoing particles, and that makes it very good experiment to the tech, the possible these plays predicts
that kind of part of the real exist.
So, let me use dark float on the model as a very simplified model as a demonstration here but remember, this is a general idea proposal so if you want to use the only to detect any displays vertex models are the disclaimer x particles, and the other kind
other kind of lonely particle that also works similar strategy applies, so I put on the simply more simplified model I'm following yours simply a demonstration manila folder Model Model very easy, very simple.
This is a. Can I turn the mass term and interact with a standard model for meals, simply with the misspeak same parameter epsilon, that's only one reply by this electromagnetic magnetic current.
That's typically long left can be light and very weakly interacting with the dark matter with a center model because the mixing parameter. Absolutely.
So, if you want me they can reproduce YMUE mystery, but any particles the incoming and outgoing me on a farm, all of them can radiate out a prime photo.
It's diagram I crawl for dog photo, theater, but it doesn't mean that they can really afford it almost instantaneously is just for possible diagrams.
So the key word is simply this very typical calculation.
Finally, in different mass range became became two different pair of finals the particles, but the morale of the lightness range they smaller than 100 me 20 right.
They solely became through electron positron pair, because they're lighter than the two times WMS, so he saw a decrease in there. And here we assuming that Duquesne Park center is also suppressed, or forbidden biochemically cinematically canonical variables.
So there is more BB more heavier, maybe you can also became we all became to talk sectors, but here we assume that only because in the only because in particular from calls from pairs.
So we only experiment look like this.
They have 14 models for each model or compete with one target is a fixed talk is the greatest target.
And these targets fall I three trackers these three trackers have very high resolution so that they can reconstruct the trajectory of the outgoing particles.
And after all the 14 models they have an eco reward system for the particle idea purposes.
And the movement beam is incoming with the energy of 160 gV and they can hit any of the 40 targets to any of the targets can become the interaction points, and we all comes here and we all can also go out and his ineligible electron from be a lot from
Cloud from the outside of the atom.
And this is the microphone. And for the dark photo case, there's the display versions from the barcode on which finally decays into line from past rankers.
And so this is basically electron, the experimental demonstration here.
If we have a quick close look. So this is the interaction for interaction point the targets and this three is are the following trackers, and after some models and get some bossier just means there are some still.
there's an economy on. And we call this the K volume will require the dark photon to decay. With this new volume so that the tape products and path through all of the following trackers of the following group crackers, so that we can have, get high resolutions
high resolutions for the final states depend on what we want and depend on what kind of background we want, we want reduce, we can require two levels in the final states, only the two products or require require all these for electrons to enter the international
space.
Or we can require them to enter the trackers or we can require them to enter the final ITAR emitters that again depends on what kind of background we have.
So, basically this volume has a distance of 115 millimeters.
All because the target that list is this.
If we allow live signal off the target and tracker require five sigma tail.
Due to the resolution and the limitation and we don't want some prompt decay, where it could be Miss return, we can reconstruct the ass that displays words.
So we are playing the Sigma tail heat trip here. So they give all of us designing this way.
So basic background, we have two big types of backgrounds, the first time is spent a lot of process with an inherently this place for it except probably happen when for example of Tales one with coconut and scattering or even elastic muting nuclear nuclear
mute with a nuclear scattering. So this our erotic process or the coherence were scattered right now, these are here.
They're typically soft or very, or sometimes very typically especially this case they have a lot of development process and allowances. So that may have a lot of fun as their partners.
It's difficult for them to really become a backgrounds but there are indeed some.
Now there are problems, probability, although it's very rare. It's not true, because they are typically soft, so they can't fake an iPhone, because in a signal process all the final four levels very hard.
They have very.
The moon colony or with the access and they have very high kinetic energy.
and they need is actually for require particle ID they need to fake the icon. So that means the coroner needs will make a mistake to, for example, their tails care of the kid piles and piles may be missed honor students, as opposed to that may be difficult.
Second process the Standard Model process with probability. But Miss reconstruct the as the displays vertiginous and that's why we have a five sigma tales away from the breaking point, we want to avoid this, for example, typically they have photons and
protons offshore photons they can immediately becomes the national parks repairs.
And this kind of stuff. And they can be reduced by requiring a parcel ID if we record all the particles each week no ecotourism needle system.
So, in summary is kind of backgrounds are very difficult to happen. They're very rare. So in the following discussion we simply assume the background zero and also important to have some private chats with those experimentalists want to be an experiment.
For us, we want to do more qualitative searches, we want more and more strictly me some very strict and very heavy working backgrounds simulation like we employ dying for simulation tools, something like that, but for now we see plays in the background
is negligible.
So in this case we have three strategies, we have four different strategies proposed for these panelists depend on what kind of background, they really get after they do the full simulation process.
So, the lose one, the easiest one only required to observe the to decay products. We don't care about the outgoing me on from the interacting point and lonely require them to enter this refractory trackers not interesting colors, medium, The medium for
require particle IP for these two particles, we require them being the partners, or this is also a medium difficulty, we require all the floor electrons to be discovered.
But we only require them to enter the factories and the most difficult one, is that we require all the Florida. Enter the final cartoons.
So because the kilometers only at the very end. So the Anglo acceptance can be very stripped. That's why this one is very difficult.
Some other cuz energy cause larger than five TV. So this is and this is an energy custom made by theorists theorists to simulate to mimic the detect response to what they experimental instead, he said that if the energy smaller than five TV attendees
very likely that the particle won't stimulate stimulate any signal inside the crackers or the corners. So this is them the cause so mimic findings threatened by the series is not a cut.
Really, we want to propose for the experiments for them to do after the data and after the container so this is a cause for the detector level, we require the opening and go to be a lot of the one breath, so that the resolution is satisfied.
It can reconstruct the opening angle. If the angles are larger than this.
Again if what, and furthers will require the final, our editors. The models that are very far away from a car meters is there for them it's very difficult for them to stimulate any signal in the colors, so we only count the last five models.
If we look at the colors, and of course they are magical because the angles happens.
So basically the results at 90% of companies level, see before their backgrounds. The rich pop who looked like this. So it's basically probes, the empty region in this in this region.
You can see that lose one has a very far region, one has very tight reach and a to medium one Oh, very cool little particles.
Right.
So conclusion me oh nice very good experiment. There ABM measuring the Iranian contribution to the new elastic gallery.
But since we have very high resolution for the tracker for tracking the part of the directories, we can Empire employ them to observe the displaced verdicts and that can be a good for detecting Bs and physics.
And we propose a very good strategies, and to show that it can really offer some privacy and rich, reaching this moment.
But again, we need further detail for the background estimations for a by the full simulation that could be down on the for the experimental it's a very interesting.
Okay. Thank you.
Thank you so much, Isaac, and I think we have time for one or two questions. So does anyone have any questions for Isaac.
Hey, Matthew, go ahead.
Is it, can you go to slide seven.
It's one. That's the one. Yeah, thanks.
So I was curious about this in volume requirement. So I think I understand the point is so that it can go through three different trackers.
But could it decay in the, in volume region of a future module as well, or does it have to be in the one which has produced.
So, This is an detection.
So basically, of course the particle can decay everywhere right also has another probability decay in the 50 k in the hallway, probably fall in places like they can probably pass through the first tracker.
And then you can became, for example, he became between the first and then second cracker right so physically this possible to happen, but we just add cuz the select the events that became between the interactive point of for before the first chapter,
impractical as possible because the experiment to record all of the second round the crackers. So if we observe some particles that only stimulate signals on the following two trackers. We can discard those data, even sparkling system searches, because
that offers unlimited resolution to reconstruct the displays versions.
So basically we can start that, but it would you allow it if it went all the way to the next module.
And then the kids in the in volume region of the next module.
In the current research in the final result I, we didn't, we didn't, we didn't do it. Yeah, yeah. So, that's also a suggestion by a private chat for those things from those experiment was.
They know was their best resolution that they can be and this patient just we do this search in this moment.
Okay.
Thank you.
Yeah, thank you so much.
And I think I'm turning over to Matthew, or host duties.
So I think our next topic will come from Emma on the Methuselah recent developments.
Hi. Can you hear me fine.
Hi, yes. Okay, great. so my connection is a week so I'm going to leave my camera off, if you don't mind, just tend to have this working.
Can you see the lights.
Yeah.
Hmm.
Do yeah there we see them full screen. Okay, great.
So yeah, this is a brief status update on the math was la experiment.
So just to, I know most of you already know this has been presented in this workshops for several years already, but just to remind people. What this detector is how it's going to be built.
So, the idea for this attacker is to target, which along with particles that will cover lifetimes, up to the rectangular synthesis limit so about 10 to the eight meters, really, really young.
It will be placed on the surface about him. I bought the CMS experiment.
And it will be working for the high luminosity face.
So because it's on the surface and there will be about 100 meters of rock, between the injection point and the gay volume will have a very good shielding from from the rock.
And these.
This gives us the confidence that we can tell us your background analysis, at least from anything coming from, from the collision.
And the idea of the factories that is a very large volume, and it will have several scintillating layers for tracking will give you details on this later.
And there are two main physics goals for four days experiment they obviously the main one is the search for Lumley's particles. And for that we need a very good timing and fixing reconstruction, but also because it's such a lot.
Continuous detector.
It's also a very good cosmic cosmic ray detector.
And these very good because even in the very unlucky event, we don't find any peace we still have a guaranteed physically very done.
So one thing that. Also, many of you already know is that we had a test and build above the surface of our outlets in 2018 and we took data. During the LSC working.
And with this test we were able to confirm the background hypothesis that we had used for the physics rates protections that we have some others law.
And so that gives a lot of confidence in this in this physics protections that we having in the experiment.
So, a few words about the layout.
Here you can see schematics of the building, a very large building 100 meter, size, and about 40 meters height of these 20 will be below ground ground, and then we'll still be.
So, we have 20 above ground, of which, 10 meters will still have at the think that that the material.
So in the end.
At 130, so design is going to be in modules we have a two one modules, nine meters side sites side, sorry, with. So, and this is the structure that each of the modules we have so we have to essentially the layers on the floor and we'll use this to veto
charts, but the only purchase particle coming from the galaxy. And then we have six layers of simulators on top, and two additional layers of simulators a bit, a bit lower.
And so making this that the three modules, has the complication that it makes tracking reconstruction a bit more complicated but it has a very good advantage that you can assembly the detector, in different stages, and also that there is very easy easily
easy is it to scale.
So the main progress we have done since the last update is in the design of the planes. So we're going to use extra the simulator buyers with way plans, shifting fibers, which will be connected to Silicon plans.
In the end, we can do beginning or during some time we considered our PCs instead of simulators, but in the end we decided to go with simulators because it has several advantages.
One is that we don't need high voltage tools to operate them, what we're doing it. Does this makes things a lot easier.
And, and the arrows are less sensitive to temperature and pressure variations. And in the end, we see that we have said the same that we can reach the required that timing resolution, with this and delighted.
So we're going to use and relate to that but they will be 2.4 meter long, and then 3.5 meters wide, and one, the one centimeter stick and the current design, and that is, I think, more or less time.
Isn't this. So the readout will go in these U shape, were two of the bars are connected with the same fiber and then this is very nice because in the end you have all the silicon pm.
In one of the, one of the sides of the plane.
And so in this cylindrical part here in this kids, we would have the silicon on the electronics and cooling and everything that we might need for for the date that they can.
But that also has a complication and is that in the other side would we have the, the bending of the fiber. It's going to be a bit more delegate. So we need something to protect them.
Which, which now has to be by the media.
And yeah, so we've tested several fibers and we've seen that this is this is 40 centimeters diameter is the minimum bending within us.
To satisfy the fiber and requirements.
And yeah, so, again, we will have measurements in each of the, of the end some of the back of the favor.
And we can use the time difference between these measurements to get an extra coordinate for for the construction so for the position of reconstruction.
So this is the layout of the final how the final
completes into later layers are going to look. So, this would be one of the models that I showed you in the previous slide. So we have to offset unit, side by side.
And then, we are planning to among them, so that the overlay, they overlap sorry. And so we make sure that there's no crack legions between, between this kind of units.
And in the end we have four of these sub plane units, placing what in need of the simulator planes perfect or you can see the skeleton of how they will look like.
And this will be the six upper layers.
And then the idea is that we we alternate x&y directions. In, alternating layers so that we can reconstruct at least three space points in this six upper layers.
So about this later we are studying. There's a facility at Fermilab that can make on this of these expressions.
So, the format of the slide is going to require about 700 tones of simulators, and with 10 some calculations and this corresponds to about three years of full production of this facility which is a lot.
And so, we've also studied the, the main features that these extrusions have to have the. So in the end, we of course need to separate upward and downward going tracks.
We also need to be able to reconstruct low beta particles from Newcastle, we can detect them. And we also need very good tracking and protecting to reduce stakes and communicate in random minute Oryx.
So we've ticked or we're testing several kinds of extra that simulators. And in the end, we've seen that the timing resolution of this Linklaters competitive with those are of the RPC.
So target timing we were aiming is about one nanosecond along the way.
And at least 15 photo electrons, at the end of the fiber, and the social press that counts.
So as I said, we tested several simulators and several other fighters from different vendors have would have found several of them that meet all these requirements.
This is one of an example of one of those tests, where we use five meter fibers, just like the ones that we plan to having the main detector and simulator bar, about 2.5 meters.
And then we use small squares that we varied along to the fighter.
fiber.
So, here you see the measurements from each of the systems, and here you see the final resolution, which is less than, about a half a nanosecond which is much better than what we were asking as a requirement.
And this corresponds to about nine centimeters for position for solution which is well within what we were fighting for months now.
And just to finish.
Some update on the idea on having an RPC layer, everything on the simulator planes.
And this is for cosmic rays studies so, yeah, as I said, we can use master Moore's law also as a cosmic ray detector, and it can be useful to study a bit more details on the is our core structure around money.
We already know by from some simulations that the only with simulators, we would be really good at measuring and giving details about inclined showers so 60 degrees no more.
But when the showers are very vertical.
The problem is that simulators are saturated quickly and with with vertical shower, you can expect a very dense number of charts particles, and the simulator boots at rate.
So then, adding an RPC would help a lot.
To be able to measure the charts particle densities in these events. We are still working progress and we're studying how much activity improvement would be that we already have some idea what the RPC layout to be.
So it would be to bring two meter time one meter, more or less, unit, and in each of these unit, we will have, like, 40 of them I think in each of these will have at strips.
2.2 meter long and 11 millimeter bit, and then we will have a frog them in a boarding in each of the ends of the RPC with one millimeter cup. And we're also studying the best option for the superstructure that right now we're considering how many components,
about one centimeter.
We.
Okay, so that's the main the main focus we're having right now. There's other work in progress that I didn't include consisting of final also in simulation in the trigger and that design.
But yeah, I think this nice progress in the design of the simulator some fibers and systems is quite is quite nice. And also the idea that we will be able to do some quantum physics, both incline showers and also impractical ones.
So we're working in DDR that we hope to have, at some point during this year. And then the idea is to be the prototype of a module, and then have the full effect of it for the high demand city.
And that's everything I had.
Yeah, have some regulation here in case you want to check more details, and on the collaboration.
Thank you. Thank you very much, have a very nice overview.
I see there's already a question from Mike.
Yeah, about the idea of having a you and join together to fibers, it seems, maybe false economy here you lose segmentation, it makes complicated analysis, and he only save cost of symptoms, plus channel which must be much of a small fraction of the cost
of the whole project, so
it seemed to me better to have just a simple meet each end of the straight fibers.
Instead of doubling up.
So, wonder how. What's the economy and having a uu band I mean you lose timing you lose segmentation, but the timing with said that it's so you don't really fulfills the requirement we wanted.
And like this. I don't think it's so much a matter of economy but a matter of making things easier to then have all the electronics and everything, only one side, and not having all these systems through all the layers in the middle of every plane.
Yeah.
Okay, well, it's obviously it was it was a big discussion point I guess but, yeah, we can see.
Symptoms must be very small compared with the cost of everything, everything yeah this only this delay there's going to be loads Amanda.
Not that Ben that band is also a potential source of problems I mean you. You said you had to, you had to have cover over the bend. Yeah. Right, that's complication to anyway.
All right.
I see feminism involved in this.
Yeah, yeah, yeah. Okay, thanks.
Any other questions.
They also had a very brief one. I'm curious what the motivation of the shifting fibers. Be I know for Milliken for it we have a little hotter scope that measures me one's going to the detector, which just uses centrally two bars of one by one centimeters
directly coupled to the symptoms. I'm curious if something like that would work or are you need them for, for some of the PMS I can bring. So this was decided, a long time ago, cannot remember by now.
But maybe I can second come back to you.
Thanks. Yeah, just just curious.
Okay.
If there are no other questions I think it's good 10 min to move to the last speaker of the session so thanks again, Emma and for all the questions.
The last speaker is didn't talk about Codex be.
Hold on a second.
human unfriendly to me.
I only seen the nervousness started screen sharing, but it was a problem on my side I don't know what other see me try again.
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Anyone have any suggestions.
I'll download the slides and I can protect them.
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very strange.
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Okay, I have been some, I'm happy to share.
All right. Okay.
I'll just tell you what to go to the next one, so.
Okay.
Thanks very much, everyone. Good morning or whatever the appropriate greeting is whatever time that you wish to be in. So I want to thank you very much, a few minutes just an update on the latest critics.
Be development.
So yes, you can go to the next slide.
So just as a reminder, again, you probably see this is the place before just the general credit, the contest.
There are good theory theoretical reasons why it's interesting to think about, or 10 or so GB light on the particles that are produced through portals that require a high positive energy, for example, or heavy meat motivates a shield in this way so the
detector the transfer to knowledge interaction point oh you can gain coverage on the cover.
Experimental from for more foresight ferment and in the case of Codex. The idea is to look over the place a detector translate the interaction between a direction, giving you a few short Bibliography from the major publications and laughter company in
there you go to the next slide please.
So I wanted to talk about two things, or briefly the first one is an update on our demonstrator, which is called Quick beta.
So, go to the next one.
So this is a planned to be installed in the same location as the eventual food detector and the old electricity I will trigger several room, it's a two by two by two need a tube of Odyssey triplets arranged just into an actress aligned configuration,
go to the next slide.
And the main goals were many fold so the the perhaps the primary one that this will run in month three and will enable us to run data driven background simulation to validate our preliminary background simulation that we can achieve logistical your background
environment.
location.
Other important goals demonstrated the integration of the detective the LX to be back to demonstrate the suitability of obviously obviously technology for tracking and track reconstruction.
And I guess relates to this is also to have this this small detective and before the show that it will have a large amount of sentimental backgrounds, in particular k longs to demonstrate the ability to reconstruct those, and the expected efficiencies
and to also demonstrated the ability of the mechanics of the mechanical support structure design and scalability, to the full detector itself.
So, the milestone achievement for this small detector at this point is that the location is the secured the funding to build the RPC chambers is also secured, as well as the actual production.
Then we plan.
Mechanical Design is completed and everything is in place in the world to integrate with the data acquisition HDB. The plan is to produce modules in the second half of this year and install.
During run three and we have some based team in place to condition and demonstrate on essentially a little timeline on the bottom left there.
You can simulate to have something you've seen before to have everything in place, it will be the moves back a year by the pandemic from any other country.
Okay, so there's a lot of progress in this direction, as we go to the next, the next slide please.
So the second thing I wanted to touch on briefly, something that we call the geometry optimization credit be, and I guess I should mention is funded by the Department of Energy lb, lb.
So, what this is, because the next, next slide is essentially a proof of concept analyses, for the content itself just basically just use a simple regular cubic design with a set of uniformly space you know LA is all along on the call it x axis and the
All along on the collide x axis and the hermetic set of surface lays on each face.
With that, set up, because we have demonstrated and can achieve order one, I'll go next week construction efficiency so make limits.
The heat resolution from the you know the finer granularity of the tracking stations.
Momentum threshold to produce on occasion think that a little bit too soft to reconstruct reliably.
So, this baseline design used about uses about 402 by two meter squared obviously triplet panels on that. You can chew and the lock is around about 4800 Square need to talk to see.
Now, this is really one of the main drivers, of course in relation time for the experiment and we just advance the slides slightly.
So, the
medical advances live.
Yeah, so, so we integrate with the Oscar for example, or how important it really is to instrument various parts of the detective as others. For example, the phone call to the direction point lookup abundance of.
As we think about a goal of trying to understand where we can rely with the Replace PC with simulator. When we take these activity in the center later role will then be mainly to reject soft background that doesn't necessarily need to be used for rotate,
people it takes from construction.
We need to go to the next slide.
So now the challenge to do this as two different components one is you have their very very many people go to work, you were thinking about and I have different textures signatures and kinematics until you need to think carefully about how to select the
And then, having done that. What we do is model the responses different configurations of the particle detector to these different theoretical scenarios, taking some prior how important they should be weighed against each other.
uniform.
We use a new newly newly developed adaptive simulation framework to do this. So we do is we start with panels populated in many more places than we did originally considered.
And then we attempt to optimize the configuration juicing.
And characterized by the relative rotates reconstruction efficiencies we do this.
And the requirements are normally that are required to track to send me to hit separation on any given station, and the momentum of the track is greater than about 200 million.
Okay.
So, we can go to the next slide please.
So, one way to get a sense of whether there is anything to optimize is just use a very naive estimate for optimization and in this case and simplifying can possibly think of.
is if headway density on each panel in the fullness related object.
And then you can simply prioritize them by the ones that are most hit delete it, and then just taught the relative efficiency versus versus the baseline, as a function of the number of panels and this is the cluster you're looking at here is precise procedure
procedure for various different 11, different interesting portals, different math ranges, different technical opening angles and. And
so what one thing was mentioning, and now you've guessed that you should wait by kitchen potentially end up waiting by panels that are statistically close at any given decay vertex.
And that's actually good for the cortex reconstruction as well. So you look at some of these.
Some of these curves you have a relatively high negative curvature, and it's telling you that most work is being done by relatively few panels and configuration which is another perhaps the prize but how negative because they are interesting so for example
in the case of the rice is quite state. Whereas some be decays a fox or six mixing to eclipse scalar, whether you have a light or heavy LP essentially controls with you have this high performance optimal number of panels a huge sort of aggressive, the
media expectation that the sensitive industry to scale the number of pounds heavier. But the real moral here, but at least on this my ears version.
You can normally reduce atrophy coverage by 30 30%, some polls will still maintain close to the full performance of the original baseline design.
Okay. Go, go on for whatever configurations look like so just giving you two examples 150 panels panels. There's obviously a bit of statistical data from a rotation with the panel
and see statistics. But what essentially tells you is that the optimizer is selecting the regularly space internal place, which is sort of what the baseline did, but telling us that we really need to focus on the back and the downstream face as we add
more panels and so on the left, 150 panels which is around 30% of the total but you get up at 80% relative efficiency and the 250 which is normally 50, you are going to get up to 90% reconstruction efficiency.
Okay, maybe we go to the next, next line.
So, listen to this a little bit more carefully and will formally using a branch and optimization technique, which essentially such as through with the palette set of possible configurations and recursive way.
So these plus here, the bowl is what happens when you use a more systematic optimizer versus the like the, which was the naive version I just showed you before, so you can do a little bit better than remeeting.
So this is a kind of a nice result to that I told you the delayed estimator actually does as well as something that's far more sophisticated.
So the, the lesson stands up reasonably well. So just just to summarize the gets the, we are should be out of time, is we can maintain a courtesy of the sensitivity of a state of really well defined as possible scenarios, but reducing the amount of occupancy
that we made by an older one second, it's going to save a lot of the time.
This method that we use.
Doctor sensitivity consultancy and fully installed.
Dr framework around to change the example otter constraints in the space no change or variation.
So thank you all and as you mentioned that will update now available on the handle at political experiments I've been given Twitter.
Very other places that actually occur until a clear.
So thanks very much.
Thank you very much.
Any questions I'm sharing sir.
Because if any hands are is
think this 100. So let's go for instance question.
Yes, I'm actually have I don't know maybe very basic question about the production. So you're saying that there are pieces of production.
This year, and then installation, essentially next year.
What is it for the demonstrated the technical That's right, yeah. Everything's being produced at CERN or do you have to. Are you Do you have plans for how to move them.
So, this is better answered by one of the people who are heavily involved in that but essentially it's the produced by the Atlas PC production line.
So I think it's a total gotta are the people that are responsible for this.
So, the episodes themselves. Sorry to interrupt particular Yeah. Deputies themselves have been produced by some Italian company. We will then ship them to serve them.
For us, then we'll send them the Atlas mirror great team will assemble them I know well and also there's
The mechanical part is being produced in Cincinnati and then we all will be moved to Southern to have to, to do the final assemble over there.
Not sure if that answered your question, more or less, as a civic curious about how you're arranging everything, having experienced some fun of shipping detectors recently
me that there have been lots of delays. Maybe that's what you're suffering as well.
So we also suffered delays.
Any other questions.
If not, thanks again to Dean, and to all the speakers of the session I think we'll break know for sure period. So, I'm sure you can see that.
Okay. Hey.
So I think, come back in 10 minutes so it.
618.
Well, let's do 620.
You need to say you're sorry.