Hi everyone.
I think the
first speaker is from fazer
clear Are you there. Yeah, I'm here. Can you hear me.
But yes, okay so if you can predict Yes.
You should be able to see my slides now right.
Yeah.
I should be able to see me now as well. Okay. All right.
Should I start.
Sure. Thank you. Yeah, okay.
Yeah so Hi everyone, I'm doing and I will be talking about the, the titanium physics, you know, became to two photon events with a facer upgraded fish our.
So as you may know as Carla already mentioned in this first of the in the first day of the workshop. The music is a reality like high momentum particles in the transverse plane.
And, therefore, just a large forward cross section that is not being used by the sum of the current detectors to throw example for an integrated integrated Illuminati of 150 in FM to learn, we have around the 2017 produce new top items.
So therefore phasers located about 480 meters downstream not the interaction point, and about 1% of these by zeros are within the vector acceptance of facial feature is that the for particles are tend to be very coordinated.
So one typical process that you can have is a problem for the interaction then you you produce.
I like mess on that indicates internally particle, then this normally particle titles, or they have hundreds of meters and then in the case.
Inside the detector volume. So for example, typical decay channels can be electron positron pairs.
And the opening angle of these electron positron is, if you take.
Typical values for the masses on their use of these lowly particles. You have seen that the opening angle can be a founders of micro radians, which means that, which means that they're after one meter.
After one meter. Dear said very soon it's about 100 micro so you have to have good partial resolution to be able to resolve the two particles.
So typical. When you can have in the, in the, in the facer detector is for example. So here's what I show a sketch of the, of the covered.
So the stark response to the others interaction points so you can have PP collision here and then I like mess on a system before, and then you can BK into a folder.
Doc folder or their processes that you can have is a broad on radiating radiating off a.
Therefore, don't or even direct for them being been produced that they are this hide scattered.
Then the third folder would travel through the Elysee facility and then on TV preachers facer.
The physical location, and then in the case was in the detector volume.
So this is what this is the kind of signal we expect so the default and again within the second volume into for example, a plus or minus.
And then thanks to the magnet and the tracker station that we have we can actually resolve the two electrons. So we have two tracks in our trackers, and then I got to meet their, their policy in our, in, in at the end of the either detector.
However, we can also have actually like particles produced are the action points. So for example, you can have been essence digging into actions and chaos for example or chaos they came to actions on violence.
And then these, these actions would travel through the Elysee facility and again DK into the face of volume and interesting production mechanism is actually producing a folder in the data center component, then these photos travels through the through
the carbon and in hits the stick metal block 333.5 meters big metal block which we call them. And then in this interaction which is called prima off, we can actually produce also accidents that then travel through the detector and then decay.
And they typically decay of these actions leads into two photons. And the problem is that with the current detector we cannot resolve these two columns for photos because in front of the query that we have right now our current push our, which consists
of two layers of simulator on two layers of tungsten so there's no way you can distinguish between photons that are separated by orders of hundreds of micro microns.
Therefore, our done is to upgrade the display shower.
And there's a three fold return for this. The first one is, we want to reject macro investor will take this day for don't signal.
The second one is to distinguish between since we can distinguish between the two photons we can actually, if we see a signal in the future we could actually characterize the new physics, you know, because we were able to, to, to resolve these two photons.
And the third one is that we can actually explore more exotic scenarios scenarios where we have multiple photos in the final set so that you can find models that then where the final state because he saw three to four photons, so we could actually be
able to have sensitivities least modest as well.
to have sensitivity loose models as well. So this is the plan so the this is the shower you have now so then up shower will be style was told in the, in the, in the same place for their space for for this upgraded fish I will, I will be composed of tanks
layers and silicon, to have high special resolution. And the plan is to be installed by the for the galaxy face. So how the signals we change within one we have now.
So, we will have the out decaying within detector volume, and now we will have like some showers, some pre showers already in the, in the sub upgraded shower and then again the, The, the energy deposit in the current later.
And this is the nominal layout we have right now, so it consists of six, six layers of tungsten, and then interviewed with layers of silicon detector.
So this licorice our size is about 200 times 200.
millimeter squared. And the silicon planes are made out of hexagonal pieces of 65 micro media sites.
And then the tungsten which is the violet one on the picture on the left.
It each one of the latest one religion now, which amounts up to six hours of radiation length in total. And this means that the probability of the photon converting into an A plus c minus.
Bear is about 99% with this thickness.
On the right hand side you can be, you're going to see one of the low energetic for them being sure that the center of, of the hour.
So how does he am an event like this look like. So, what I shown the left is a heat map of for the x axis correspond to x axis of the, of the new, a shower in micrometres on the y axis to it to the new fishing micrometres as well.
So here to show the two photons of to TV which will show that they are they are the shower with as a base of 500 microns. So you can see that we can with the detector resolve these two photons and, and the tactics you know.
So we actually completed the efficiency of reconstructing these two photons are separate photons. So, this is showing the problem there right so the y axis shows the efficiency on the x axis show the distance between the photons.
So for example, if we look at the the blue line response to the machine learning approach, and then the we build a simple reconstruction algorithm to identify these two photons, and this is shown in orange.
And you can see that for separation sub of say 250 micrometres we get the efficiencies idea about above.
80%.
And this, this, this lines correspond to two photons of of on TV.
Everything we are actually looking at this wall is because we also have neutrinos that penetrate into the shower and generate the shower that could trigger signals so this is something we are also studying also work in progress.
I stand the mice and my final slide is just a sensitivity brought that we obtained
for this kind of models we have like measurements digging into accidents and other life lessons. So we're showing the y axis is the coupling on the executive show the, the, the mastering.
They must have the action in gv.
And then the different lines. So the blue line corresponds to an integrated luminosity of three minutes at the one, then the red line corresponds to add a scenario where only part of the run three data was recorded which corresponds to 9090 minutes penguin
one under the bloodlines correspond to taking into account the efficiencies of reconstructing photons have of 200 to 200 micrometres separation 300 micrometres Exeter.
So you can see actually.
So if we are able to reconstruct photons.
We said based off of 200 micrometres you can see that we can actually access to a regional face base I really was only 90 in the photo on Facebook note color by other experiments showing in gray.
And I have to say that there's a lot of room for improvement. Also in this, in this plot, because this was also only done with a simple reconstruction algorithm, not.
So there's a lot of improvement to, to improve in this in this kind of algorithm and an improvement sensitive.
And that's everything. Thanks.
very much, and.
Any questions or comments. If not, I'm over.
I see Mike.
Yeah, thank you that's interesting development. I just find it on this particular plot here.
You should presumably block out the region of the Pi Zero mass and the hnh prime mass because they go to camels.
And they'll come from the, from the veto counter in front of the beginning in front so you won't have sensitivity around those masses right. They've been of Pi Zero and HR background.
I can you repeat that please.
And they will be pi zeros and eaters, and eight of primes indicated gamma gamma right but.
Actually, no because in front or if they decay within the detector volume, it may be a background but I don't think you can have a serious coming from the others interaction point.
And the cane actually, because we have a very salary. Yeah, sorry, they will indicate inside the volume but you have a feature account that they can be produced beginning of your pre shower.
Dedicate I mean dedicate promptly right but, but unless you can show that the vertex is inside the decay volume. Well, and not at a plate in the shower.
So, so how would this balance be produced again coming from the, from the are you mean by by just interaction with the tungsten yeah i mean you have a lot of interactions in the tungsten absorbs up front, from, but this will just contribute.
So you mean the two photons written the banks and I'm creating some pilots in the in the showers.
Yeah Pi Zero can be created yet.
Yeah, that's a good point.
I think this, this will be part of what it's part of the singer right because they're produced by the two photons coming from the signal.
Yeah, I mean if you if you reconstruct the matter what the mass resolution of your gamma gamma is but yeah, then, then you'd probably not be sensitive around the Pi Zero mass and the eight and eight primes mass because they will be, you know that there
will be plenty of those functionalities upstream.
I'm going to share what I will have, I will have to think about it.
Well maybe that's the case. Yeah. Okay, thank you.
So this is definitely not taking into account in this plot.
I see Alber as his first question for us. What do you think, you will be able to install something of that sort.
I heard you saying the the luminosity thing but they still want to install something in round three right.
Um, no, this is intended for the high luminosity let's see phase. So, will you still around space or during the high luminosity because we won't have to face.
And that may be. So we're completely different.
Um, I think the plan was at the beginning to have it for part of France three but I don't think this is feasible anymore so I think it will be paid by the face or don't Yeah.
Okay, Linda thing yeah that's right, but that will be bigger and things like that because you have a much bigger detective.
that because you have a much bigger perspective.
Okay, but that's just a dumb question, what motivates the 19 verse 20 points.
So these guys wanted to want to send it when this book was done, like few, I think, months ago. And there was a scenario where the shower would be upgraded, at some point of run three so I'm not recording the full frontal luminosity 150 but part of it
on the 90.
Okay. But now the nowadays. Yeah, this is not an option anymore. I far as I understood.
Okay.
Okay, Well thank you very much for the very interesting, tuck it looks like a very nice upgrade to visit.
And I think we should move into it, and the status and plans of Morocco experiment.
Again, and Matthew Can you hear me.
Yes, can try to share.
Still working
yet.
Yeah, it's worth.
All right. Yeah, so I'm gonna present a status of the American experiment at CERN and the plans for the coming months and years.
So basically we're interested in the search for particles with a very low charge. So basically the current landscape of known particles is that they all have either zero electromagnetic charge like the photon or unit or multiple of the electric charge
plus minus one, etc.
Or they have fractional charge but they're confined like Clark so you can count really have those long live free propagating particles. So, the question we raised is, do we have in the universe.
Free propagating long list, articles, with an exotic charge in particular Milliken is interested about the, the, the order of hundreds or thousands of the electric charge.
So, there is this generic model that uses the mechanism of kinetic mixing, where you have an extra a human group
and associated firm and fields that do not coupled to the Standard Model directly but the you on prime mixes with the Standard Model hypercharged. And basically what you get is you have a new fermion that carries and effective electromagnetic charge.
So you would be able to produce that particle in an alien like phenomenology in pairs as is illustrated in this in this diagram.
So we've built a demonstrator for the Milliken experiment. A couple of years ago for that data and indifferent to in 2018.
And basically the idea is to have large simulation volume or at least distance seen by the particles producing in the at the CMS and direction point, that would fly up to the orange gallery where the detector is located.
And these particles, so we didn't see three layers for demonstrator of a simulator array.
Hopefully, ionizing the middle.
The material and and leaving there, a very small pulse. And so what you require is to have a coherent signal in each of the three layers.
So that was the moon demonstrator, which actually already hit the edge of of the existing existing excluded region as you can see on these limit, or at least constraint bloods for results for 20 2018 and under right here you have a teacher of the Milliken
gallery about CMS, where the Milliken demonstrator was located and where we were, we are currently building the next iteration of the demonstrator of the of the vector which is actually made up to detectors.
So, the idea is that now we're going to have a larger and improved bar detector as we call it, which actually now has a wider coverage so it's four by four incentive to buy three and it now has four layers because we learned from demonstrator that this
was helping reduce the background significantly.
But today is very sensitive large volume of simulation detector, we are adding a complimentary slab detector, which is not to scale on the, on the picture and that's important because it's actually much larger in coverage or acceptance.
It's made of also four layers of slabs, which are actually 40 times 60 centimeters.
Large, so the geometrical acceptance of the side of the picture is much, much larger.
Both these detectors are made of simulation volume which is coupled to these pre amplifying PMT so the PMT is are carrying a print fire board on them.
So, this is the expected sensitivity for the run three, as well as for the high linearly see with the given luminosity is there. So, what you see is you have the bar detector, which targets basically the lowest ionizing MCP submitted charged particles
and and the bar detector.
So covers the lower mass region, as you can see on the, on the plot Center and the slab detector, which has the advantage of having these larger geometrical or Angular acceptance helps us gain insensitivity for the DMC is that the more energy into detector,
which we can afford, then to have a smaller seen volume beta, beta particle. So we're now building these two detectors in the gallery.
In view of taking data in the, in the, in, actually, this year in 2022.
So I'm going to show a couple of features of the situation so these these are the things that seem to their bars. So, on the far edge of the picture you see the, just the bar, to which we touch a PMT and and make it like diet soda.
There is no pollution from ambient light and,
yeah, basically that. And so this is what you get at the end so it's a taped bar with a PMT connected to it so this this was done at UCSD and now the bars have been shipped to CERN.
So the bars are grouped in modules and super modules and basically it's all assembled in this large metal cage that we then get lower down to the, to the gallery to be installed.
Um, we've even had already have the DAQ setup for the bar detector in a gallery, which is basically now waiting for the detector itself so we have ways to test the dq without like either with bars from the previous detector, or both generator and so on
so we have wasted desert dq and, and. So basically now the status of the bar detector is that we have all bars at CERN, they're ready mountain and tested, and the mechanical structures that I've showed you to cage and supermodel structures is ready.
So we really just need to check again that the the bars, haven't suffered for from the, from the traveling and the shipment. And then just assemble them in the, in the structure and lower them to the gallery, and then retest the deck with, with the detector.
So, so this is very
good status for us. Now on to the slab detector.
We are currently in a process of mounting the simulator. The pm fees on the simulator slab so we actually have four of them first lab, so that we can collect as much light as we can.
And so this is a. These are pictures of our setup.
At the point five where we have our Milliken lab on the surface.
So you see, have we have these holes in the wrapping to allow for the p amp t to be connected, which is unselfish central feature and then see how it looks like after, after it's done.
So this is, this is currently being done at CERN.
And this labs will be assembled.
So on the double ride the sketch is not actually how it looks like it what it looks like it is essential feature where you have the slabs assembled in these mechanical arm, which is soon to be machines.
Right, so the suit is is that we have all the slides and the empties here at CERN, the PM, these have all been tested. Now we just need, we'll just we need to mount BMT slides, then discuss the slabs for light darkness and and and and assembles labs into
the mechanical structure I've just showed you, and have everything down to the gallery.
So the timeline is that construction as well its way.
We have everything here at CERN so it's just a matter of time and effort to assemble and finalize the testing, which we probably will probably take a couple of months, we first need to be able to take data.
This year probably around the end of summer.
And we're very excited because this will allow us to significantly
increase the, the Explorer region in a search for me to church particles. So, thank you very much for your attention and, and I think I'm done.
They are listed in the Pulitzer questions.
guess I should apologize to them at least parts they're responsible for that mess of cables you see there.
Yes, okay, they're not there anymore.
So I see Julia.
Yeah, thanks to the nice talk I was just curious.
You say, whatever your last in your next steps on the previous slide. The last thing to do is to test the the deck and start running. I'm just curious if the the deck needs.
Is it the same as what you have for the demonstrator do you need to do any work there to make it ready for the full thing. So the two detectors are really completely separated like the run independently and they have each of them has their own Tq and
digitizes and like it's it's it's really just a different. I mean the setup is the material and the seven it's very similar but it's just another one that we need to set up.
So, yeah.
Sorry. So, it's another sort of copy of the same deck or other significant differences i think i mean there is yeah there are differences in the way we're going to trigger, and because the geometry of the vector and the backgrounds won't be exactly the
same. So yeah, it's a different deck.
Okay, thanks. cool.
Okay.
Let's see any other questions. So thanks again.
Very nice update on the status of Milliken
think we now move to nearly.
Hey, does anyone else hear that yeah I could not. Yeah, I cannot.
You're still muted Daniela.
So we apologize muted automatically Can you hear me now.
Yes.
Okay, so he was my phone out the head skate Let me start my share.
So,
not allowed to show screen.
So I can share screen. I did this morning. Actually,
Let me, I can try to make you a co host for your for your talk and maybe that fixes the problem.
Yeah.
Wait,
actually showed some slide this morning so.
So let's try again.
No, don't let me
over system preference security and privacy to grant access this is because I did a mock up great, a lunchtime.
Show.
I can share the slides.
Oh, that would be nice if you can share the slides, and then I will, I will tell you. Next slide. Sorry about this.
Okay, that's, That's great. That's great. That's perfect anyway.
So first of all, thanks a lot for giving me this opportunity. So what I will be discussing that will be presenting some work, which have been done with the leaner combination of disguise in various paper as a work in progress, and I will talk about bunk
leave particle in some extension of the seesaw. Now you see some other.
So, yes, please. Next slide.
Okay, so just a brief introduction, we all know that the neutrino mass require new physics beyond the standard model and the simplest possibility is to add the right hundred and three know, so it's not that hard to simulate that and you know, total single
singlet on the standard model, which have your interaction with the Higgs boson and the mayor and the mustard, which is allowed by gauge symmetry. This allows to realize the likeness of the three namaste to the seesaw mechanism.
so you will have that light neutrino under, having a tree know I guess state.
What I will be interested in a right handed neutrino, broadly speaking of the electronic scale where electronic scale I mean from 100 MEV to let's say 100 gb something similar.
This is because I'm interested in collider searches.
So, the reason it needs relation between the mass of the having a tree and all the mass of the line between or and the mixing gang go between the activist dividing the three you know which is depicted here in this question, and this implies the long lifetime
for 100 or three you know which the case to a mixing with the academic arena. So in this plot in the middle right of this panel, you'll see that that given the, the mass of the randomness of you know the visa range where the random screen is stable on
collider scale it display at the case displaced, so far from the interaction point that always drop this monitoring some mixing also implies this production cross section is suppressed.
Next slide please.
So now this nicely so scaling can actually be modified it two different ways. The first way is to add the more than one round and.
So if you have more than one right hand in between all the parameters that you have a parameter, and the UK one.
And the master parameter, it becomes matrices. So the relation between the diagonal.
why new or the mixing game well in functional this this combination of matrices. Then put on point is that when you have more than one right hand and three, you know, there is an extra freedom in that they want a lazy day of analyzing the system, and
this is best seen in what is called the gods ICZ Sean, so there's an extra freedom, given by mn by now, and things and complex, or Dungannon matrix.
And the important point is that this made priests can have angles which are complex numbers so they can have a real and imaginary fire.
They might you know be part of this complex angle causes an exponential announcement of the mixing, as it's shown in the last the next to the last equation on the slide.
This breaks the main relation between the mixing angle and the mass of the having a tree, you know, and allows to span the basically the whole parameter space of the right hand in the mass I'm mixing the angle of course incompatibility to the experimental.
Next slide please.
This is where you can actually modify you know you see your model is to take the nice model actually seriously. So if you think this is the model really see there is no reason why you should think that this is the whole story, but in more complete that
you'll be theory, there will be some extra degrees of freedom, and there may be a higher scale that complete that complete this model. So, low energy below this, let's say the scope of lambda you compare them with your eyes You're making around set in
the usual way like an effective field theory, only that the fact that now this effective your theories build out with a standard other fields, under 100 or female, and this is known as then neutrino Standard Model effectively theory or in be true as the
see support.
Anything is not that dimensional five there are only two new operators, besides the wind.
There is an operator connecting the right handed to you know to the hwh supervisor. And there is a dipole operator of the randomness we know with the iPad charged field strengths.
Next slide please.
So, this two operators I really need phenomenology. First of all, clearly they will give new decay modes for the big boat, and the boat so this means that this operator is phenomenology by discipline data will be a primary target for future Hicks factories,
as the FCC for example or the is to have sex SIPC.
So, in this equation you see the what's the rate, the modified rate of the external Selena Selena and it said, you know, partial with.
And in our work, we have to consider, mainly the many different collider many future Higgs factory, we only got the Higgs traveling threshold. So 240 gb where you maximize the production of the Higgs in association with the dead boson, and the other dead
polygon, where you have it there had said that option with the board attend to the 12 said bows and produce it clearly now the production crew section for the random fino is not suppressed anymore by the mixing game at the bottom left part of this, of
this panel, you see the production cross section with a very random no trees not induced by the onH operator sort of interconnected with the Higgs boson, and they said on ended a full operator.
So, this is not anymore suppressed but the game is suppressed by the scale up.
In this scenario, however dedicate still in use by mixing with the branching Ray showing the final state have one left on on two coats, or two letters, given by the branch the ratio of the data.
So your normal branching ratio of a random or three you know induced by mix.
An athlete.
But we have studied the possibility that random three no decay displaced within their future environment of a sec machine or ILC or the click machine.
So, this printing realistic we have to consider displaced, a random again with the pump centimeters on one meter from the direction point. So, assuming a future geometry of the detector which is under this way.
Importantly, rather than, you know, I may around a particle. So from the decay of a pharaoh ran to you know you can actually produce the same same day, let us.
So, you come up to left on the same side. This has a negligible background, because there is no standard model, you know you reducible standard modern background that gives this final stage because it's less conservative in a standard model.
So this is a reading channel, and has from the previous slide we can see has roughly 20% of the decay rate of the right under the tree.
So here in this spot I'm showing you our, our results so in the left block that we said the results for the run of the Higgs threshold that 240 Judy, and on the right block, there is there a result for the random zip code threshold, so 99 pG their example
dashed line or the limits that can be obtained in this future call either by the measurement of the additional invisible Higgs boson venture ratio, or on the right spot from their measurement of the dead goes on.
As you can see, searching Chevrolet the greatness of the indirect reach on this adventure ratio,
With a Swiss kind of final state purposes for example you can test order 10 to them I, I think the demand was for adventure ratio, the Higgs boson, and the Higgs run or the tentative understand the branch of.
It said balls on that ball and run. So this name is well beyond the one conducting about from procedural measurement, we can test multi TV, Reggie for that.
And in our beta we have discussed on sort of the prompt and the collider stable case but this is the displace a prediction for discount slide please.
So this what was concerning dimensional fiber a two dimensional six a brand new domain worth it I thought so that I don't want you to read the whole list but we said bunch a bunch of operators that you can write a dimensional six.
The important fact On this edition operator can induce can induce additional decay modes dimensional phi the decay mode of the randomness we know is one, despite the mixing, so is the standard one of the system model, a dimensional six you actually switch
on new became. This became older divided into game modes and three fer me.
on w balls on originals. So there are three certain of state, or the decade to stand up more than you know.
Bill speaking into categories. And importantly, this new edition came out and dominate over the mixing, as is shown in this block were below the solid black line, the decay in dimensional operator dominates over the one in new Spider Man, interesting
Interesting before the film about a given section which is good energy squared process. So this is a really interesting dad get the for future community to be collided as, for example, click or as now is becoming more and more popular in your.
Next slide please.
So back producing.
You know will give you a final statement to fault on our energy to lead guns on the fourth edition of smells.
With this higher dimensional operator, they showed the key length that the length and the data Amal can actually be in the displaced region so this is shown to amass and they got upscaled lambda, the blue region is the one where the decay land that is
will be displayed. Say, between again point one centimeter, on the one on the right blood I'm showing the limits that can be obtained with a similar strategy.
Using this place, but this is, as you can see again you can test that really high cap scale and now you said physics again in a multi community. So this future Hicks factory thing this dimensional six operators this new typical lighter a really effective
innovator is him, or what also jumped on your staircases next slightly.
So, finally, I want to comment about some work in progress we're doing at the moment so this is what I was looking at the moment was it some experiments, which are sensitive to the key length that we didn't want me to.
are sensitive to order of 10 hundred meters of became a as far as that metals land. As we heard in these days, the question we're trying to that second the test the scenario.
So we're starting to work on the case where we have focused on the simpler case, so no mixing between that give us that I know that you know, normally the dipole operator on.
So there is only one decay channel one right handed or three you know the game to them is the randomness we know underfoot.
The decay Lang is functional of course also of the massively in the more the generator these guys are the long, they're the decay length for 990 Namaste, the dominant production is based on the case so the signature and looking at is the following, Amazon,
for example hJ side they can get to about random three no one is going like this table for this. So, our security is a symbol for Don became discipline to escape all of that in this final state.
So here on the right blog I'm showing you the limits that can be obtained by phases and sir, little area overlaid with all the limit to obtain for example for cheap, though the experiment, like charm.
And we just said found whether other expect. In fact, this final state the single photo signature, which we understood these are quite challenging, having that justice England for done.
So any experiment that is welcome and I think worship was really helpful for us.
So I think I'm done with time so I just flushed the conclusion in the next slide on the lead time for questions, comments. Thank you.
Thanks very much.
They can go next slide with Yeah.
Yes. Yeah.
So I'm presenting so I can see if anyone has their hand raised.
Yeah, see 100 has a hand much. Okay, go ahead. Yeah. Can you can you just clarify it has this has been fully studied for Atlas and CMS, in terms of what they can do on his case.
So yes on the Higgs the case. So he gets the case into random to me.
He has been studying for some there are some theory papers cited on one of the previous slide by Caputo Amanda separator. So they tested this scenario or the other.
and also the dipole operators so the decay, let's say additional Day of the Dead has been studied in college.
Yes. So this is the computer people What year was that written on the computer. Can you go back a few slides ago by heart I think 2016 but if you go back, like two three slides I think a quote and how
you got it. Okay, so, Yeah, it's 2017 delicacy paper.
Thank you.
I have a question
on this last part where you make the single photon, what is Do you know what, what is the energy of this photon.
He's not really. It's not a really hard photon, the energy can be
10 so gv let's say less than 10 gb out NGV okay because because as we heard on the first day that this, we have this capability with the CMS Mian detector to detect these photons if there may produce later.
So there's NGV, there is a possibility to observe that.
So, yes, yes, good yes yeah exactly this is what when I said this workshops been interested that yes, I was referring to that is really working the mind with a collaborator Yes, we need to we need to check.
We started with the target which was fazer okay great so yeah we, if you have more information on it, we would be interested in seeing it and maybe try it out.
Oh, that'd be nice. Sorry I cannot see your screen, can you tell me your name so we can we can chat offline. I cannot see my face. Yeah.
I'm surf I'm at Fermilab Caltech okay.
Okay, thank you. Thank you. Thank you.
Could also suggest to keep the discussion going on matter most.
If there's general interest.
Okay. See this is another question as well.
Pay
me join them.
Hi.
Hi again. Now I wanted to do tell also mad, that there's this this photon signal on the dimension five and they mentioned six operators. It's currently being studied from his boss and we have a paper from Monday on that, and it's, it's nice because they
can be because trained by nine pointing for them in Atlas, so there's there's work going on in that direction so maybe you can take a look on that.
We actually Chet Baker i think is the paper you're mentioning with the way you talk about so the electronic writer.
Yeah, and the Higgs boson versus to to right to hitting neutrinos and then you have to Fordham's from that that's that's our signal and we've checked that we could do something with the, with the model for from non point importance, there's work going
on you know unless we have a, we have a chat on that, on, on Tuesday, so they know I remember the talk about, I think was the paper where you thought this Higgs became too random or three no going to fall down but then you need to trigger on the electronic
said the writer. Yeah. remember what they're doing now on I bless but if you choose to go for it with a Hicks production I'm Victor boss infusion. That's what we are doing or paper.
Okay, you can do as much better with the backwards. So that's, that's something new going on on that side and went to share it I think I missed it, you might be to send me the paper.
Yeah, of course. I will invite you guys from Monday is.
I think I may said okay.
Just so fresh.
Yeah.
Okay, thank you that's that's into thank you for your nice talk.
Thanks for the question.
Thanks very much. Thank you. I think we're probably going to have to move to the next speaker to stay on time.
But thanks again for the good talk and they'll be interest. Thank you.
Okay.
So I think our last speaker is Lisa, are you connected.
Yes. Can you hear me.
Yeah.
Okay, great. I will check.
Thank you.
Can you see my screen now.
Yes.
Okay, great. Then I will start right away.
Okay so hello everyone. Thank you for having me here today, and my name is Lisa, I am currently a master student at university, and I will do a talk on the topic of Long live particles at the FCC, and I will focus on the, on presenting some of the results
from my own master's thesis for a long lives having you two laptops.
So to start off, the SEC is the electron positron stage of the future circle look later. And the SEC itself is a tunnel of 100 kilometers. It's a conference with two different stages so starting with the SSP as a first generation Higgs electorate, and
talk factory a tight luminosity.
And then the SEC will continue as the FCC hh as a energy frontier Hadron Collider.
And so the SEC is a frontier Higgs top electronic can flavor factory where we can directly discover new physics and such as long as particles.
So currently there are two detector concepts for the SEC. First the CO design by the Sunday new collider to take the group, which has been adapted for their CC.
And then there's also the new idea design, which has been specifically designed for this and CE. And that's we are currently still in the preparation of stages for the FCC there's still a lot of opportunities to design general purpose detectors with longer
live particles in mind from start with opportunities for new and creative designs. And one example could be the heat detector which is dedicated for long lifetimes.
And there are of course a lot of ongoing work on this topic, and some of it presented in this Snowmass white, white paper, where three longer physics cases are presented to have initial leptons axiom like particles and Higgs boson switch subjects the
case to longer particles.
to longer particles. I'm part of the ongoing work is also my own master's thesis, with simulations of Long live taping each electrons. At the FCC, and as I said that will be the main focus of this talk.
So, having your lap dance, or right handed style have the neutrinos, and they could shed some light on some of the open questions of the standard model, such as neutrino masters very on symmetry and dark matter.
I show you here to the right, the sensitivity blocks from the physics Briefing Book with HTML six to electron neutrinos. So you can see here the reach for HTML on the for the SEC on the terrorist he run for for the mass and the electron couplings.
And so the SEC will prob space not constrained by astrophysics or cosmology, and complimentary to accelerator and neutrino prospects and also the parameter space for the originals.
At the SEC is also very good for barrier Genesis.
Yes, amount to the simulations that we have made currently, and we have made simulations for the SEC forum.
As a start, that can be built upon in the future. And we have simulated processes environment diagrams to the right, with one have the new to left arm coupling to enter 2018 hours, and we have defined the final states to be electronic electronic music
and the simulations have been generated using math. Math graph PCs and office, and with the latest idea card for the detector reconstructions.
We've also used one micron that HTML.
With the model at the top here, and all the analysis has been made in the FCC framework and asked for the analysis over a long lived and having you to laugh dance, we have used this relation here for the decay links, and so we can see that for it and
Yes, and here we will see some of the results for both reconstruction of the generated and unreconstructed level for five benchmark signals here with different monsters and different cufflinks.
And, and then decay next year is shown in 3d so x y&z directions. And this confirms that the signal kinematics behaves as expected, both are generated and reconstructed level, because we can see that for 18 hours with a smaller mouse or with or with smaller
cufflinks we will achieve longer killings.
And also we can also see that each and as we longer decay length, gave us more. A more reduced number of reconstructed events.
Okay so over to the two also introducing some of the signal and background analysis that we have done, we have used centrally produced background samples with the idea detector.
And they've been generated similarly as the signals.
First, here we can look at the total missing energy to the right, and we have it for the five background samples that we use. And then we have to benchmark signals with different couplings, and also note that we are looking at the total missing energy
for the electron positron Collider, and not only the transfers missing energy.
And for the first event selections that we made in this analysis we required required, the total Missy my mentor to be greater than 10 gV.
As you can see your soul.
And another interesting variable that we've looked at is the transfers impact parameter D zero of the electron tracks from the eternal decay. And so to the left, you'll see that the zero parameter in the transverse plane, just an image and then you have
the two plots to derive both the same clock but in different ranges on the x axis of the impact parameter again with the same background samples and the to benchmark signals here.
And we can see on the right clock that we can achieve pretty large values for the impact parameter for long live, having electrons.
And here we have started with that transfers impact parameter, but in the future we can and should move on to this 3d impact parameter, and also here to start off in our event selections we have required the D zero to be greater than 0.5 millimeters.
Yes. And here we have some results of the first attempt at events selections. So the table show the cumulative expect the number of events. After each selection.
Looking from left to right on the reconstructed valuables and for 150 per app to buy. And as I said, we have used the takedown missing momentum, and also the transfers impact parameter and the vetoes are on nuance photos and jets.
And these are four, five benchmark signals, again, with a total of 50,000 roll number of simulated events, and then moving on here we can see some of the results for the background samples and the background samples that were simulated between 10 to the
power seven to 10 to the power of nine of total roll number of events, and you can see after the final selection to the right we have, in some cases, still quite relatively large uncertainties that limits our selections and analysis.
So, one of the next steps that we would like to see is to be able to simulate larger background samples so we can reduce these uncertainties.
Yes.
And here you can see a preliminary sensitivity to props from our from after hours elections where our choice of merits, use the number of signal events, and the number of background events and the uncertainty on the background.
After all these elections, and the plot here shows that simulated parameter space for the HMM mass and coupling. And so the white areas are serial number of signal events after the selections.
You can also see two contours here first s equals 0.05 includes here, and then S equals 0.01 in yellow.
And we have also included a theoretical prediction for comparison in read from this article here. And the first thing to note here would be that the theoretical prediction includes all of the each of the keynotes which our analysis does not currently,
and so it would be expected that the theoretical prediction has to be a broader sensitivity than ourselves currently.
Oh, and also just to mention as I said before, we are including the uncertainty on the backgrounds for our sensitivity so of course that affects this sensitivity block as well.
Yes. And finally, I just want to mention some of the next steps that we would like to see the near future possibly.
So as I said, we are limited by the background statistics currently so it would be very nice in the future to be able to produce larger samples and other option to explore in the future could be a background fits to the right you can see an example of
where I've done a background fits for the transfers in fact parameter, with four different input, input functions. But again, larger background samples would also benefits.
And this.
These fits as well, because then we could with more confidence decide on one and correct it.
And also some other next steps would be to investigate some additional variables for our selections and also to optimize this lesson is that we have now.
And of course also add the remaining decay modes for the sensitivity analysis and, and we could also explore some different detector configurations.
And with that, I say thank you for having me. And thank you for listening.
Very much.
Do you have any questions, I see, well that's not plus the hunt.
There was a very nice talk very interesting to see the sensitivity and during this to see the simulation of backgrounds as well.
I think it's quite unusual to have that already for for detecting proposed in the future collated so it's great to have something so robust.
I'm curious, for it for the simulation of the detector How did you decide the, the resolution the performance.
While we did you have an idea what that was based on.
You mean that using the idea detector.
Yeah, so for example the, the resolution of the D zero.
And I'm not actually sure myself we have use the assessment the Input Card for the idea detector which is, this is the framework so I haven't really myself been looking at any more details on that.
Okay, so it looks like actually if I put everything. The background is mainly coming from toast so those are really displays things. Okay, interesting.
Okay, thank you. Good choice he
says, as a collaborator of Louise's I could just chime in to say that all of this is implemented in Delphia so that's what what we're assuming, and also that it's I think it's what you know the FCC collaboration now is I'm assuming as the default, but
unfortunately I don't know any more details than that.
Okay. But yeah, I was just curious, kind of, what kind of parameters you put into the office for example for the, the resolution the track will be able to achieve on the D zero or something like this but I understand, and I don't have those numbers, I'm
sure, sure.
Yeah, thanks.
I was just curious. Okay, I see LinkedIn has a question and then we should probably have a question and a comment. I think I'm not the collaborator I'm not the expert to claim that but I believe the latest ideas, detect a card in deltas actually uses
some kind of realistic, though, co simplified physical model of the, of the vertex resolution for example, what if you look at their card you actually find each layers of trackers okay just what's the resolution of each layer, the millimeter, and then
also the thickness. So I think the authors. If you want, I can point you to the reference okay.
For example, the multi scattering effect that introduced in each layer and they have likes introduced 10s of layers of this okay.
Dude, I mean just, according to the actual detector profile is a pretty complicated business is pretty marvelous that.
But it's only available at idea detector, because his latest technique.
Yeah. So another question so so this is the comment.
Again, I'm not the collaborative this.
On the other hand, I have a question on Lexi the framework analysis framework you use, do you use EDM for HTTP framework that's being used for many sec upcoming works.
For example, for a vertex thing vertex tracking and also like say the vertex reconstruction because that's not included in this package.
And I think maybe and Juliet knows this better I'm not actually sure. And so, yes we are using UTM for hip. Yep. Thank you.
Okay, thank you. I think we should close the session there.
And then, not to try and get back on time we'll have a five minute.
Coffee Break.