WEBVTT 00:00:00.000 --> 00:00:00.000 Can you hear me. 00:00:00.000 --> 00:00:04.000 Yes, we can hear you fine. Okay, perfect. Alright, so welcome everyone to the session on apps. and thanks today. Along the protocol worship, and I propose maybe we wait one more minute in case there are a few more people who are late coming back from 00:00:04.000 --> 00:00:23.000 I propose maybe we wait one more minute in case there are a few more people who are late coming back from lunch, and then we can get started with a talk from Christine, 00:00:23.000 --> 00:00:49.000 Christian, so. 00:00:49.000 --> 00:00:59.000 Yes, 00:00:59.000 --> 00:01:29.000 spotless. 00:01:34.000 --> 00:01:38.000 I think the number of participants is about stabilized maybe we should go ahead. 00:01:38.000 --> 00:01:41.000 Yeah, good fight. So Christian. 00:01:41.000 --> 00:01:54.000 Can you go ahead and tell us I saw beginning first off from Christina how things are coming up from the top, which sounds like a very cranky title. 00:01:54.000 --> 00:02:01.000 Not even speaking with Chris. 00:02:01.000 --> 00:02:03.000 Can you see my slides. 00:02:03.000 --> 00:02:06.000 Yes, I can see your side. 00:02:06.000 --> 00:02:12.000 And I guess you can also hear me yes I can start. 00:02:12.000 --> 00:02:28.000 Yes, must just said, I want to talk about apps today, and more specifically about charming, if that's ethically light states that Kappa dominant, which was a type Crocs, and have can have play by my own IT companies. 00:02:28.000 --> 00:02:43.000 I think I talked last time about jamming out like a year ago, and they talked about how they can have ceased by violating couplings, and possibly build on live, and then be searched for dedicated detectors and back then someone asked me yes but how could 00:02:43.000 --> 00:02:46.000 research for them it's intact. 00:02:46.000 --> 00:03:00.000 So that's what I will talk about today, how to search for long lift apps in exotic up the case that space unwrapped and was actually come on up it was relevant to me. 00:03:00.000 --> 00:03:15.000 So let me quickly review the framework. Wrong talk we are thinking and so we consider general, if we are the only treat ever kept links to the right hand attack type crocs. 00:03:15.000 --> 00:03:18.000 So, we have this coupling see you. 00:03:18.000 --> 00:03:29.000 That is the three by three matrix and our case, and can have a diagonal entry so that we can have flavor violating effects from happening. 00:03:29.000 --> 00:03:45.000 I said earlier, it's coupling permanently to that type crocs because of course if we consider loops and the normalization curve, equation running. We always will have couplings to leptons down type crocs protons influence. 00:03:45.000 --> 00:03:57.000 And what is very interesting about this kind of models and it's also quite nice from a fundamental logical point of yours that you can throw a wide range of masses risk various processes. 00:03:57.000 --> 00:04:10.000 We look at very small masters NZEVRKB rich and we can have cosmological and astrophysical probe if you go to the, like, one gv region. 00:04:10.000 --> 00:04:22.000 We can have flavor probes and if we go to even higher masters we could search five fives and also chairman of content creators six target experiments and so on. 00:04:22.000 --> 00:04:39.000 I don't want to talk about all this possible. That just one could do. So I just chose a parameter space here where we have, on the one hand side under one excess of one over. 00:04:39.000 --> 00:05:06.000 lower mass regional apps pretty much constrained by astrophysics, and cosmological constraints for a little bit higher masters we have our display of our constraints. But then if we go to even higher masses we have sister That's right, which here, where 00:05:06.000 --> 00:05:11.000 that Mr valid SMEs are mixing constraint from BB BB mixing. 00:05:11.000 --> 00:05:29.000 And I have drawn a little diagram, up here so the music and mixing in our case is only camera dress basic cabling see one two or 321 so we can easily handle that constraint. 00:05:29.000 --> 00:05:45.000 So how could we perhaps this bride reaching over there. Our idea was exactly the exotic peptic case, namely is the decay of the top to an ad, and then other, like uptight croc so that's drawn here. 00:05:45.000 --> 00:06:11.000 And as I said we want to invite us to debug mix and constraints or resembles coupling that comes to us to zero. 00:06:11.000 --> 00:06:28.000 which are all equal and soft diagonal cufflinks except this one two couplings that are also all equal, then one can see is that for a given Frenchie ratio based changing the diagonal coupling one can change the lifetime, as seen on the red side we have 00:06:28.000 --> 00:06:44.000 and dotted lines come from changing the diagonal coupling. So, one can follow the same production Frenchie ratio get different lifetimes. But one can also see here quite nicely as if we want to think of longest apps, and that is what we want to think 00:06:44.000 --> 00:06:53.000 about it makes sense to stay in somewhat like last regional app so like one to 10 g ri. 00:06:53.000 --> 00:07:07.000 So in the following We will also not yours, too. 00:07:07.000 --> 00:07:20.000 And the next step if we want to look at this top the case, we need to know how charming is the case without as shown here and. Not anyone can clearly see that are considered mastery sessions. 00:07:20.000 --> 00:07:25.000 The main became mode of charming apps would be to have drones. 00:07:25.000 --> 00:07:44.000 So, for the masses, it would be mainly clearance shown as a green line and then for higher masses, would be mostly to to chunk rocks. We don't have flavor violating the case of IPS because we have sets of one to two one company two zeros and we only have 00:07:44.000 --> 00:08:02.000 two apps to champs back to clients as the final state of the total final state would be one night chat, and then two trips from, and they will mostly be seen as one shot as it is highly posted at the case this place. 00:08:02.000 --> 00:08:22.000 Before I move towards the search we proposed for that process. Let's look at what has already been done for flavor violating couplings, so we can look at the prompt region where we would have a top, and some jets from the, from decaying flavor violating. 00:08:22.000 --> 00:08:36.000 That's like 0.01 centimeter region, then we can have a little bit higher nine times where we have the case. After that, yeah and the 2.5 to two meter region. 00:08:36.000 --> 00:08:54.000 And then if we have being stable on collider states on collider scales. We will have appearing as missing energy and as such. So we also look at top plus missing energy researchers, we have extra flavor by donating coupling spend more. 00:08:54.000 --> 00:09:03.000 But one can see here that there's quite a gap, and that just basically between this to me times 10 meter here. 00:09:03.000 --> 00:09:08.000 So that's the gap, we want to close with the search we propose. 00:09:08.000 --> 00:09:15.000 What we specifically look at this top production we have one of the top, the case as a standard model. 00:09:15.000 --> 00:09:35.000 Top decay is a to a B Corp, and W and the other top the cases of flavor violating rate I described earlier, we look at us for two masters one to gv and the other 10 GV, and without going to completely unreasonable permitted choice as a couplings as a 00:09:35.000 --> 00:09:49.000 captain constant at A. We get lifetime sense of one millimeter to 10 meter regions or we can cover quite a bit of lifetime, and still have somewhat reasonable friendship ratio such an exciting company key. 00:09:49.000 --> 00:10:01.000 We propose more or less to search strategies one quick follow one Rails applications are trying to calorie meter and run or below five cases and Leon spectrum return. 00:10:01.000 --> 00:10:07.000 First, let's have a closer look at what happens upside the case and hedonic calorie meter. 00:10:07.000 --> 00:10:24.000 So, sick know what have three to five chats, maybe six, if we see two tracks from the app and one or two of them will be displaced. And another one should be be tech so that's the first material we put on our search, then the second thing that happens 00:10:24.000 --> 00:10:39.000 is that if the applications are had chronic calorie meter, but if all its energy ends are trying to color meter and basically none of the electromagnetic color and we tussles a ratio of the energy, the positive and the coloring meters will be back. 00:10:39.000 --> 00:10:58.000 On the other hand, and can be set up and upload for standard model background like TT bad this ratio of loggers and officers ratio would be distributed around zero, where we have the same amount of energy deposited electronic and enter electromagnetic 00:10:58.000 --> 00:11:00.000 color and. 00:11:00.000 --> 00:11:20.000 On the other hand, sickness, Shawn was a colorful lines. What Pete later so we by putting a cut on this ratio we can reduce the background. Another future sickness that is neutral, so it leaves no tracks and the tracker. 00:11:20.000 --> 00:11:39.000 On the other hand, a standard model chip that for some reason, still has this flash cutter meter ratio will have tracks as shown alone has a number of tracks for such Standard Model chats that are appearing displays, according to the calorie terrace show, 00:11:39.000 --> 00:11:55.000 as shown and one of the four tracks risk PT lectures and Twitch. tv. And like Lewis for the four tracks without any cuts on the PT and it can be seen in both cases that they appear tracks. 00:11:55.000 --> 00:12:02.000 And so if you put a cap on the number of tracks, we can also reduce the TechCrunch drastically. 00:12:02.000 --> 00:12:20.000 And the results of those to cut, as shown in the same, you have about two minutes left. Thanks. 00:12:20.000 --> 00:12:24.000 magnitude so they post pride power for cats. 00:12:24.000 --> 00:12:40.000 Let's have a very sharp look at what would happen. Applications a million spectrum meter, then we would have one chat last because we don't have the chat from the stack we have one event and Amanda's term was no associated tricks pointing to the primary 00:12:40.000 --> 00:12:59.000 tactics, we assume that that signal could be searched for background free, of course we are all coming from series of no guarantee on that statement that already brings me to the result so in the shaded regions with the proposed am a current structure 00:12:59.000 --> 00:13:08.000 up and country, the region that is excluded already from the top class map and single topless chat searches. 00:13:08.000 --> 00:13:12.000 Why is the breadline process to the right shows. 00:13:12.000 --> 00:13:28.000 The Music Man expected exclusion region from the search and the electronic calculator that I described earlier, plus 350 inverse and to ban and the main difference between the two masters is that for 10 GV is is a little that boosted. 00:13:28.000 --> 00:13:45.000 So our lines basically moved up with it and one can see that already was actually proposed on contest crunching Rachel's up to like 10 to the minus for a little bit lower, even, and the fun things of a background for you search, which we think could be 00:13:45.000 --> 00:14:01.000 possible. A bit more sophisticated strategies that one could reach both the case and the hadron spectral me test me under some down to around 10 to the minus seven, and was higher luminosity. 00:14:01.000 --> 00:14:08.000 One could possibly even reached down to punching ratios 10 to the minus eight. 00:14:08.000 --> 00:14:27.000 So that already brings me to my conclusion. So, what we propose a searching for new physics and acceptor. And we have seen that most of the parameters based above some threshold is actually pretty much unconstrained, And that a very interesting way to 00:14:27.000 --> 00:14:37.000 approach this parameter space this by looking into accepted top the case. And that already, not overly complicated search strategy. 00:14:37.000 --> 00:14:47.000 Cut Pro Frenchie ratios down to 10 to the minus four and possibly more sophisticated searches could even improve that cried a lot. 00:14:47.000 --> 00:14:51.000 That was that's already it thanks. 00:14:51.000 --> 00:14:52.000 Thank you so much. That's very interesting. 00:14:52.000 --> 00:14:57.000 Just so much. That's very interesting. Are there any questions. 00:14:57.000 --> 00:15:01.000 Yes. 00:15:01.000 --> 00:15:02.000 Yes. 00:15:02.000 --> 00:15:08.000 So, this is a nice example of a very general search strategy. 00:15:08.000 --> 00:15:15.000 I mean that you've chosen a specific model but in general, one should be looking for exotic top the case but along with particles in it. 00:15:15.000 --> 00:15:31.000 The thing is that by, by, I mean you focused our attention on the Multijet final state but there you have more trigger issues and and more background than if you focus on the case where one of the tops the case electronically, so then you have potentially 00:15:31.000 --> 00:15:32.000 leptons trigger. 00:15:32.000 --> 00:15:51.000 Yeah. Laptops jets and and and a general very general search for left on plus displaced vertex is, you know that that's the kind of strategy we should be pursuing as a, as a very broad search strategy in the community. 00:15:51.000 --> 00:16:01.000 I just want to what what you, what you looked at as far as trigger and what you want. Why you didn't use the laptop. 00:16:01.000 --> 00:16:16.000 What we consider us basically that's the standard model like top DK, again we are all from the theory side so anyone from the experimental side wants to correct me please do so that we can reconstruct the Standard Model like decaying top. 00:16:16.000 --> 00:16:28.000 Those that we didn't focus on reconstructing it of course that can be possible and it's probably easier by doing it on the electronic general back we don't focus on that part at all. 00:16:28.000 --> 00:16:45.000 We make sure I'm not, I'm not referring to reconstructing I'm referring to just getting the actual event recorded. Yeah, that's something where we basically say okay that's the past was experimentalists we focus on the path that has new physics and not 00:16:45.000 --> 00:16:51.000 understand that model like. 00:16:51.000 --> 00:16:55.000 Okay, thanks. 00:16:55.000 --> 00:17:01.000 Thanks for the question. And I see that we have time for one more question from Susan. 00:17:01.000 --> 00:17:18.000 Thank you, Christina cristiana that was interesting. Um, I have a question about shorter proper lifetimes you mentioned them in the beginning, and said that you want to bridge the gap between two meters and then basically stable jobs have been searches 00:17:18.000 --> 00:17:28.000 for these shorter lifetimes. I was wondering if there have been searches being done at use the tracker, rather than the kilometer Could you comment on that. 00:17:28.000 --> 00:17:45.000 I can't comment too much what I can say what we use here is basically, it was just one where we happen thing I talk was chats, that have a flavor violating coupling likes diagrams shown up here. 00:17:45.000 --> 00:18:04.000 And we have this two lifetimes because in those searches, there's no additional detailing allowed. So the flavor violating chat basically shouldn't have a detect and be tech happens in between those two regions so that's where those two regions are coming 00:18:04.000 --> 00:18:20.000 from, and the new stuff, just the search for a single top plus plus met already assumes No, sorry I think I don't understand where it is two regions actually come from some what is displaced, or. 00:18:20.000 --> 00:18:36.000 Yeah. Respect to background that they say okay we focus on the region where be the case are prominent, and they happen at the short lifetime. And then we have one search reaching where everything is really requested to be prompt and you have a beetle 00:18:36.000 --> 00:18:47.000 for longest constituents. Yeah, that's kind of what we consider so in one case with a is a case outside of the detector that's where the 10 meter comes from. 00:18:47.000 --> 00:18:50.000 That's just single topless midsections. 00:18:50.000 --> 00:18:55.000 Then, on the other hand, we can have, so I became really prompt. 00:18:55.000 --> 00:18:59.000 So then we have a top, and some chats from that. Right. 00:18:59.000 --> 00:19:07.000 And those chats from that I have no be tech or anything. 00:19:07.000 --> 00:19:20.000 So, from what we found was that the P tech requires events, called chats, in between the 0.10 centimeter and 2.5 centimeters. 00:19:20.000 --> 00:19:38.000 So we basically exclude far as a prompt such as all upset with decay in this region because imagine that those chat could be passively constructed that be tech, so that's where those two numbers come from as a time to meet up and come from the end of 00:19:38.000 --> 00:19:42.000 the color and retest basically. 00:19:42.000 --> 00:19:51.000 Okay, thank you so it's related to the requirements by by P tagging right that allow you to interpret that search. Yeah. 00:19:51.000 --> 00:19:54.000 Thank you. 00:19:54.000 --> 00:20:02.000 Okay, thank you so much for your questions and of course Christian preparing this presentation, of course if you have questions feel free to quickly. 00:20:02.000 --> 00:20:13.000 So next we have a talk from Ruth about apps from indicates adult to 00:20:13.000 --> 00:20:16.000 see. Can you see my screen. 00:20:16.000 --> 00:20:20.000 Yes, perfect. 00:20:20.000 --> 00:20:33.000 Yes, I will talk about apps from videos about to, and specifically I will talk about the distinction between displace and and let's build a case, which may be better to explore the searches. 00:20:33.000 --> 00:20:41.000 Of course we all heard about one of particles or an extra days of the last three days so I don't need to introduce anything here. 00:20:41.000 --> 00:20:48.000 But the important point for my talk is that generally most particles have a lot of different the case of niches. 00:20:48.000 --> 00:21:04.000 And a lot of the interesting ones are either displaced, or they may have particles that are so long life that dedicate out of the detector, that is the missing imagery symmetries, which are the two that we focus on today. 00:21:04.000 --> 00:21:20.000 Now we're, we're currently in the, in the obsession. So, our benchmark model for this study where else, and specific views on effective an effective theory where we have an up in addition to the standard model. 00:21:20.000 --> 00:21:33.000 And we have one of either either these terms, which is to say, we have either an ARB that couples in the up to finance or two who zones. 00:21:33.000 --> 00:21:45.000 And we studied this at belted, which is an A plus minus collider with small boost very little background, especially in the displaced way. 00:21:45.000 --> 00:21:49.000 And that is optimized for bt case. 00:21:49.000 --> 00:22:08.000 And so, we look at is an art produced from IB to KDK, which means that we, we have to consider the running of this theory here to get to flavor changing current. 00:22:08.000 --> 00:22:25.000 Now let me, let me get to the first half of our comparison, which is displace the case, what we assume here is that we have decay into K and out and out the case and to paraphrase little particles within the detector. 00:22:25.000 --> 00:22:34.000 But it's the same with the tracking with such a distance that we can still make out the tracks in the end. 00:22:34.000 --> 00:23:04.000 Then we can, we can share the number of displays particles of displacements that happened in this way, by the number of particles compression ratio into the thrashing ratio of the output of the final state, efficiency, and then this factor which tells 00:23:06.000 --> 00:23:16.000 And that gives us a plot like this, where we have made a simulation with event generated data, we assumed you a background here. 00:23:16.000 --> 00:23:31.000 And we've looked at your final states, either into electrons or two meals to compare to our later missing energy search. 00:23:31.000 --> 00:23:43.000 And we see here that new ones we can, we can explore, quite low couplings up and cheer them up to barge on two, three TV. 00:23:43.000 --> 00:23:54.000 Whereas with the electrons we said a much, much smaller coupling, which is due to the, the presence of the mass and 00:23:54.000 --> 00:23:56.000 the branching ratios. 00:23:56.000 --> 00:23:59.000 The. 00:23:59.000 --> 00:24:11.000 The other half and the more involved. Part of our paper, where the invisible the case where we have enough that is produced by the case, outside of the detector. 00:24:11.000 --> 00:24:18.000 And here unfortunately we can of course not say that we have no backgrounds. 00:24:18.000 --> 00:24:24.000 Because a lot of things are look invisible to detector. 00:24:24.000 --> 00:24:36.000 And so what we do is we have to do this as an inclusive search, we look at all of the decay particles of the whole of Santa care. 00:24:36.000 --> 00:24:48.000 That is just hey we take into account everything that was the first BBQK, and also the second be that we don't know that the chaos decays into. 00:24:48.000 --> 00:25:07.000 And then we have to also analyze all possible backwards, and we've taken into account, be based backgrounds, and also continuing backgrounds from house that are produced, directed from the plus and minus the number of invisible events that were observed 00:25:07.000 --> 00:25:27.000 is that given by the number of these types of branching ratio into our production, times the efficiency, times the number of times that the up the case Berlin once it's already out the detector so there's the probability that the other still stable at 00:25:27.000 --> 00:25:30.000 the edge of the detector. 00:25:30.000 --> 00:25:39.000 I should point out here that this car isn't necessarily the same as this one. 00:25:39.000 --> 00:25:57.000 As the, the tracks in different parts. Part of the detective system may not be enough to see nuance, but may already be enough to say this is not available. 00:25:57.000 --> 00:26:06.000 Now how did we make this analysis, how did we try to separate the signal art from the background. 00:26:06.000 --> 00:26:17.000 What we did is we first thought about Okay, what is this the initial decay process. 00:26:17.000 --> 00:26:24.000 What are its most important variables, neither the mentor counted the plus. 00:26:24.000 --> 00:26:29.000 But the momentum it's the off, isn't something we can see. 00:26:29.000 --> 00:26:40.000 So what we did is we we chose to use the missing momentum that the detector can see as a proxy for PR. 00:26:40.000 --> 00:26:49.000 And based on that, we chose three variables to describe a process, which is the transfers momentum of the kale. 00:26:49.000 --> 00:26:52.000 The opening and know between the two mentor. 00:26:52.000 --> 00:27:00.000 And we reconstruct the females on Mars from the camera mentor and the proxy for the opponent. 00:27:00.000 --> 00:27:05.000 Now, there's not usually just one k on in a process. 00:27:05.000 --> 00:27:09.000 And so to choose the right hey on. 00:27:09.000 --> 00:27:15.000 We also have to choose a proxy, and for that we use the K on with the highest PT. 00:27:15.000 --> 00:27:25.000 That means, of course, that we have some rate of wrongly reconstructed events where we choose the wrong town. 00:27:25.000 --> 00:27:33.000 Now we made a bunch of events to explore the sun. 00:27:33.000 --> 00:27:36.000 And these are the events are required for the signals. 00:27:36.000 --> 00:27:42.000 That is to say all of these events have 52 k process. 00:27:42.000 --> 00:27:55.000 And the solid line you see is the, the values for the, for the three variables foolish process, whereas the dotted lines are what we see, for the difference. 00:27:55.000 --> 00:27:59.000 Miss reconstructed positions. 00:27:59.000 --> 00:28:03.000 And you can see that 00:28:03.000 --> 00:28:10.000 the, the signals lie relatively close together, especially the, the low. 00:28:10.000 --> 00:28:14.000 The low mass ones, 00:28:14.000 --> 00:28:27.000 which can make us think at first that this may be very nicely separable from a backpack. So next we should have a look at what the background looks like 00:28:27.000 --> 00:28:34.000 the comparison between sigma, the background here is an arbitrary units. 00:28:34.000 --> 00:28:53.000 And we can see that the right team indeed to be regions of parameter space where, where the shapes are definitely different backgrounds that we have here, and better than the ones that we've looked at in this paper, or the production IE plus one is two 00:28:53.000 --> 00:29:01.000 cows to like Coke hats and to be marathons. 00:29:01.000 --> 00:29:29.000 Now, based on based on this, and based on the planes off variables. We've made a country based analysis to to introduce paths to best separate the signal from, from the background, and here you can see the backwards and black, that is left off to a good 00:29:29.000 --> 00:29:48.000 the pods, in the, in the third direction and each of these plots, negative for example in the slot that most of the background that is left over after the cut and nitpicky direction seems very well separated from this area where we take the signal to 00:29:48.000 --> 00:29:52.000 be. And the same is true in these other two cases too. 00:29:52.000 --> 00:29:57.000 But it turns out there is no background. 00:29:57.000 --> 00:30:16.000 That is still left our raffles analysis, which which speaks for a more and more involved proper experimental analysis with more variables, but still taking this background production that we found. 00:30:16.000 --> 00:30:28.000 we make balance and comparing with a boss search PTK and you knew that we reinterpreted for our apps. 00:30:28.000 --> 00:30:45.000 And for different for different amount of time to my run, 0.5, and most autobahn is about to about three is that right now, where it's 15 minutes at one is the initial goal belting. 00:30:45.000 --> 00:30:51.000 And then down here the dotted line that we have is for 00:30:51.000 --> 00:30:59.000 instead of assuming the background that we still have left our for analysis. assuming we could completely redo it. 00:30:59.000 --> 00:31:03.000 And now it's probably best to compare this with what we've had. 00:31:03.000 --> 00:31:17.000 And we find that the the best invisible bond that we find for about two 00:31:17.000 --> 00:31:24.000 is significantly stronger than 00:31:24.000 --> 00:31:42.000 this these despise pants we have up until the point where we where we get to a higher masses. And this is due to the fact that, as you may remember here for hire masses, we have, we have variables that have difficulty different. 00:31:42.000 --> 00:31:58.000 So, we want to just specifically hi MOS analysis, we might be able to improve improve our invisible search here too. 00:31:58.000 --> 00:32:19.000 But the pretty much the two populations we have as a bell to continues to be a burger detective for longest particle searches and invisible structures, even though they require a lot of fruit elaborate like cuts and analyses, have consistently very high 00:32:19.000 --> 00:32:23.000 potential for for surgery for longer particles. 00:32:23.000 --> 00:32:32.000 But that doesn't mean that we shouldn't look into this place such as a lot, because in addition to that, and their potential. 00:32:32.000 --> 00:32:35.000 For our final class from the space. 00:32:35.000 --> 00:32:40.000 They will also be much more useful for characterizing our piece that we have. 00:32:40.000 --> 00:32:50.000 And of course this is not a general statement. this is a statement that that may vary from different models and also different detectors. 00:32:50.000 --> 00:32:52.000 Thank you. 00:32:52.000 --> 00:32:54.000 Thank you so much. 00:32:54.000 --> 00:32:58.000 And I see that we already have a question from my. 00:32:58.000 --> 00:33:07.000 Yeah, and we have a lovely particle namely the case zero you didn't discuss case zero background. 00:33:07.000 --> 00:33:12.000 And that is true. 00:33:12.000 --> 00:33:31.000 So, and we have in our Allah shimmy simulation of particles here, produces actually case zeros. 00:33:31.000 --> 00:33:35.000 But as far as I remember, 00:33:35.000 --> 00:33:41.000 We have the decay programmed into the simulation. 00:33:41.000 --> 00:33:50.000 So they are, they are part of these backgrounds, we haven't dealt with them specifically 00:33:50.000 --> 00:33:53.000 me, it's the one. 00:33:53.000 --> 00:34:06.000 How many cases, how many charge counts do happen in the total sample to know how many chart counts because I've actually have a similar number of a neutral counts. 00:34:06.000 --> 00:34:10.000 And they have a space vertex which can be centimeters. 00:34:10.000 --> 00:34:17.000 That's true, but so the, 00:34:17.000 --> 00:34:41.000 um, as far as I remember, and I'm sure that I, I can't give you more more precise onset, is that this should all be part of this background, and since we have the detective sighs we have is around two meter, and anything that the case within that we, 00:34:41.000 --> 00:34:50.000 we take as part of this backward and we take, as part of the calculation for the, for the missing women. 00:34:50.000 --> 00:34:57.000 So we should take that, all of that, even the displace things we should take into account. 00:34:57.000 --> 00:35:07.000 In this inclusive search so if we ever decay up here that still goes into our, our assumption for the invisible vector. That makes sense. 00:35:07.000 --> 00:35:18.000 Okay. Well, anyway, I mean it's good to see to see the case error signal and that would be convincing if you see the case here and signal and catch lifetime and so on so forth but a interest. 00:35:18.000 --> 00:35:23.000 Okay, thank you. 00:35:23.000 --> 00:35:28.000 Okay. Thank you, Michael. I think we have time for maybe a very very fast question. 00:35:28.000 --> 00:35:32.000 And Susan. 00:35:32.000 --> 00:35:49.000 Thank you, it's not even a question I just wanted to comment a bit more on this case heroes I'm a collaborator on the project. And so the main point here is that, In addition to the displays all of the invisible RP also request charge k on that is associated 00:35:49.000 --> 00:35:50.000 with it. 00:35:50.000 --> 00:36:09.000 And this basically reduces background from long Lyft case euros by a lot. So we specifically use as a sport described it, the kinematics that characterized to body decay of a B plus into a k plus, plus, along lift up under the desk very characteristic 00:36:09.000 --> 00:36:27.000 is also very different from the Standard Model three body decays plus two k plus and YouTube neutrinos, and the case heroes are included in our background simulations, but in the end they are not the dominant backgrounds that remain after applying these 00:36:27.000 --> 00:36:30.000 kinematic selection requirements. 00:36:30.000 --> 00:36:32.000 Okay, thank you. 00:36:32.000 --> 00:36:39.000 Thank you so much for that expert, extra explanation of questioning process questions please feel free to shoot them to the matter was channel. 00:36:39.000 --> 00:36:44.000 And I think I'm going to hand over to Julia. 00:36:44.000 --> 00:37:00.000 Hi. Okay, great. Next up, we have I'm probably going to butcher your name I'm really sorry. We will talk about long lives light Meteor there's some Higgs boson the case that the HLCFCCHH, and our proposal for dedicated LP those actors for the FCC change. 00:37:00.000 --> 00:37:06.000 Are you there. do you want to share some slides. Yes. 00:37:06.000 --> 00:37:07.000 Can you see. 00:37:07.000 --> 00:37:09.000 Yes. 00:37:09.000 --> 00:37:10.000 Yeah. 00:37:10.000 --> 00:37:11.000 Okay. 00:37:11.000 --> 00:37:13.000 So Hi everyone. 00:37:13.000 --> 00:37:28.000 I'll be discussing a work on Long live like mediators from expose on TK at Hulu let's see an FCC hh. This is a work in collaboration with the proper touchy and shaky Matsumoto. 00:37:28.000 --> 00:37:45.000 Yeah. So, in the exporter, which is a table motivated both theoretically, as well as experimentally. The Long live particles will have a dominant coupling to the Standard Model Higgs boson, and if these particles are lighter than half the Higgs boson 00:37:45.000 --> 00:37:50.000 mass. These can be produced from the exotic decays of the Higgs boson. 00:37:50.000 --> 00:38:01.000 So here we have considered a light scalar mediator, which is motivated from a dark matter model as it can solve the small scale crisis in the structure formation of the universe. 00:38:01.000 --> 00:38:16.000 And this is the engine for the scalar mediator, where this term gives us the mixing between the mediator, and the Standard Model Higgs boson, and this is highly constrained from experiments, and this term here gives us the coupling of x two phi phi, and 00:38:16.000 --> 00:38:31.000 is not severely constraint so far. So as we reduce the mixing angle, the lifetime of the mediator particle increases, given that the decay of the mediator dark metal particles is kinda medically not feasible. 00:38:31.000 --> 00:38:41.000 So this can also be seen from this bottom right lot where we show the lifetime of the mediator, as a function of its mass for different values of sine theta. 00:38:41.000 --> 00:38:43.000 In this minimal model. 00:38:43.000 --> 00:38:54.000 So now where to look for the NNPC in this work we have focused on the neon spectrometer, since it is the least affected by pilot, being the farthest detective from the interaction point. 00:38:54.000 --> 00:39:09.000 And it also has a large DK volume which compensates for its distance from the interaction point is also sensitive to multiple TK most likely like even apart from nuance, even if the media dedicates to add one final states at last can reconstruct misplaced 00:39:09.000 --> 00:39:22.000 it says in the mass spectrometer, and CMS can look for cluster of heads in the non spectrum meter coming from the interaction of electrons, protons and electrons with the eye on your explicit. So, both these experimental collaboration. 00:39:22.000 --> 00:39:32.000 At last, as well as CMS have put enormous efforts in searching for LPs in the neon spectrometer, and we use these studies as a very inspiration here. 00:39:32.000 --> 00:39:50.000 So here we actually do a study the sensitivity of the CMS Milan spectrometer at HLLHZ, and the neon spectrometer of FCC ah. Now, let us look at this plot in the bottom right of the slide where we show the distribution of the decal and in the left frame 00:39:50.000 --> 00:40:04.000 for mediators are fearing masses and lifetimes. and here we can see that after around few 10s of meters Atlas and CMS main detectors, the start losing their sensitivity, and they're this dedicated LLP detectors will play a crucial role. 00:40:04.000 --> 00:40:20.000 So if you also study their sensitivity and be focused on the transfers detectors because, in our case the mediators are mostly centrally produced. So for the HR related we focus on the Mark was land could expect detectors, and for FCC hh we propose a 00:40:20.000 --> 00:40:26.000 a new dedicated electric detector, which we call the delight. 00:40:26.000 --> 00:40:38.000 So, our analysis strategy for details in the neon spectrometer includes triggers based on both prompt objects, as well as displaced objects. So let us begin with the prompt objects. 00:40:38.000 --> 00:40:54.000 Here we use prompt objects, coming from the production mode, it can be Isagenix from Guangdong fusion are the two forward jets from the vegetables on fusion or the prompt ticket products of the vegetables zones in the VH production mode. 00:40:54.000 --> 00:40:59.000 So the first column here corresponds to the set of guts, as. 00:40:59.000 --> 00:41:03.000 And these has been taken from the face to CMS at one trigger menu. 00:41:03.000 --> 00:41:12.000 And they also use another softer set of guts, assuming that thresholds on the prompt objects can be reduced in the presence of displaced activity in the non spectrometer. 00:41:12.000 --> 00:41:25.000 Now before we discuss the triggers, or selection criteria based on the displaced objects. Let me mention one thing that interface the particles have propagated in the presence of magnetic field, till the end of the tracker. 00:41:25.000 --> 00:41:39.000 And we have implemented it till the end of the moon spectrometer which we needed for this study, where we are dealing with both, both boosted, as well as displaced mediators, which can actually, in the absence of magnetic field, there will be there might 00:41:39.000 --> 00:41:43.000 be problems in the isolation of the DK products. 00:41:43.000 --> 00:41:48.000 So, Continuing with this displaced objects triggers. 00:41:48.000 --> 00:41:52.000 We have performed analysis for various decay most of the mediator. 00:41:52.000 --> 00:42:05.000 And we have studied a range of LLP masses between point five gv to 60 JV and wide range of lifetimes. So let's start with the displaced Milan's case where the media to particularly case to to me ons. 00:42:05.000 --> 00:42:22.000 And here comes to the CMS, or triggers for the standalone neurons, where it does not need any matching to the inner detector hits for the nuance we can, we do not need to restrict the decays anywhere in this in the detector. 00:42:22.000 --> 00:42:35.000 And there we can use some impact parameter cuts as well as the tickets on these on the display secondary vertex, and we performed this analysis, and for the, for anything else digging. 00:42:35.000 --> 00:42:40.000 I mean for the media to dig into anything else other than the neon. 00:42:40.000 --> 00:42:49.000 We need to restrict the tickets to the neon spectrometer because if the media decays. Prior to that, they will, the final states will be depositing energies in the calorie meters. 00:42:49.000 --> 00:43:04.000 So, here we of course restrict the DK to the MS, and since we are following CMS be required the energy associated with the LBDK to be above some threshold to ensure that we have enough number of hits in the moon spectrum we do. 00:43:04.000 --> 00:43:17.000 In addition, we also put a cut on the charge number of charged particles associated with this displaced secondary vortex to minimize the background from standard model Long live particles like a short. 00:43:17.000 --> 00:43:31.000 And so, in both of these cases we consider a harder as well as a softer set of guts. And then we combine these in this four sets of cuts, which we finally use for owner for over this. 00:43:31.000 --> 00:43:41.000 So the first one is just a hot set of cuts on the displaced object and we just require one at least one what takes on one cluster for in the events. 00:43:41.000 --> 00:43:52.000 And the second is demanding to such displaced activities, and this, this is expected to have significantly low background rates but the signal efficiency will also get affected. 00:43:52.000 --> 00:44:09.000 The third possibility is to combine a prompt set of a prompt object with the heart set of guts, and then relax the guts on the displaced objects. And the fourth one is a more optimistic one very relaxed both the prompt as well as the displaced set of 00:44:09.000 --> 00:44:16.000 cuts and expect that still this combination is enough to keep the backgrounds in control. 00:44:16.000 --> 00:44:30.000 So, in all of these cases we as human observation of 50 events and put some limits on the, on the branching ratio of x two phi phi. So few hundred percent DK of the mediator to nuance. 00:44:30.000 --> 00:44:40.000 We can go up to 10 to the power minus six for immediate amass of 60 GV and the more sensitive limit comes at around 2.5 meter. And similarly for BB BB. 00:44:40.000 --> 00:44:48.000 We can probe up to 10 to the power minus five. And the set more sensitive seat of value here is five meter. 00:44:48.000 --> 00:45:01.000 So what we have done is we have presented limits as human hundred percent branching to each of these DK modes. And also we have combined these are as per the branching of the minimal models that we discussed, and we presented such grids where we show 00:45:01.000 --> 00:45:17.000 the lifetime and mass of the media and the color bar shows the upper limit on the branching of x two phi phi. Now here, we can fix this extra five five branching, and then the limits on CTR can be translated to the limit on the mixing angle Sangeeta as 00:45:17.000 --> 00:45:33.000 shown in this blocked. So next, be considered the case in a dedicated it will be detectors like moto slot and codecs be. And these have considerably less amount of background so an observation of 40 events is assumed to be enough. 00:45:33.000 --> 00:45:41.000 And this box shows the typical numbers of the upper limit on branching that can be achieved in these cases for some typical mediator masses and lifetimes. 00:45:41.000 --> 00:45:58.000 And this plot here actually shows the combat complementarity of the CMS male spectrometer analysis and the Moto slit analysis, and we can see that actually these two can probe, a lifetime of around 10 to the power five meter for immediate a massive 60 00:45:58.000 --> 00:45:59.000 gV without any gap, given the branching of extra five five is greater than or similar 2.1%. 00:45:59.000 --> 00:46:14.000 without any gap, given the branching of extra Phi Phi is greater than or similar 2.1%. So, so for the FCC hh neon spectrometer we have performed similar analysis like the CMS one. 00:46:14.000 --> 00:46:32.000 And, yeah. So here, the results can be found in the paper but I would like to draw your attention to two interesting points. So let's focus on this blog which shows the pseudo rapidity distribution of the Long live mediator. 00:46:32.000 --> 00:46:45.000 For particles which are restricted and then we restrict the DK in the within the VR spectrometer. And here you can see that this blue line which corresponds to a mediator mass of 50 gb and a shorter lifetime of point one meter. 00:46:45.000 --> 00:47:01.000 After putting this cut of DK within the Mian spectrometer. It is a more, I mean it is populating more in the forward direction. And that is because it has no lifetime so it has to have boost to reach them on spectrometer, which it is getting in the forward 00:47:01.000 --> 00:47:02.000 direction. 00:47:02.000 --> 00:47:19.000 So, unfortunately, the FCC hh reference detector has this bothered me on spectrometer. And that actually helps in increasing the sensitivity to newer decay lens which otherwise would have been difficult to do more background, if we had to search for these 00:47:19.000 --> 00:47:26.000 in the tracker. Another thing here. So, what is the expectation. 00:47:26.000 --> 00:47:39.000 I mean what a improvement we expect from going to 14 TV collider 200 TV Collider, so we have a cross section increase by a factor of 15 and integrated luminosity is expected to increase by a factor of 10. 00:47:39.000 --> 00:47:44.000 So we expect if the efficiency remains the same a factor of about 150 improvement. 00:47:44.000 --> 00:47:52.000 But, so this is 100 TV provider so we might need to put stronger thresholds on our PT cuts. 00:47:52.000 --> 00:48:05.000 Due to huge amount of pileup, and so we do this exercise here that we keep on increasing the PT cut and see how the improvement degrades, have it set with this exercise. 00:48:05.000 --> 00:48:19.000 Also, since these are in designing phase we can think of higher granular detectors so that we can reduce this delta phi cut so basically the reduction comes from this delta phi cut and this can be actually retained. 00:48:19.000 --> 00:48:24.000 if we make it more granular so that the identified that can be reduced. 00:48:24.000 --> 00:48:40.000 And finally we propose a detector dedicated for LLP for the FCC hh we call it delight detector for long lift particles at high energy of hundred TV. And since, since ages, still under study. 00:48:40.000 --> 00:48:56.000 There's much room for optimization, and since our mediators are mostly centrally produced with proposed to place this detector at equal to zero at a distance of around 25 meter, and we discuss three benchmarks of different sizes. 00:48:56.000 --> 00:49:07.000 And this, he'll be sure the result for this third benchmark which is twice the volume of moto Islam. And we can see an improvement of by a factor of around 430. 00:49:07.000 --> 00:49:23.000 And since it's a longer detector so this delta Why is shorter. So we expect better shielding against cosmic rays and being closer to the interaction point might need some more studies to reduce the background at 25 meter because hundred TV collider will 00:49:23.000 --> 00:49:35.000 have more and more backgrounds and also since it's closer we can think about integrating it with the trigger system of SSH. All of these are under further steps. 00:49:35.000 --> 00:49:50.000 So that brings me to the summary. So in this work we have studied the landscape of Long live like mediators, the exotic decades of standard model Higgs boson using the CMS spectrometer, and Mark was LA and Scott xB at the HL sec. 00:49:50.000 --> 00:50:01.000 And the CMS male spectrometer both transfers and forward at FCC hh. And we also study or new proposal delight in light of the FCC. 00:50:01.000 --> 00:50:12.000 Another interesting thing is that we have here combined all the dominant production most of the Higgs boson and multiplicity cables, and this actually gives a comprehensive results. 00:50:12.000 --> 00:50:19.000 So, if you for further details you can have a look at this paper, and thank you. 00:50:19.000 --> 00:50:27.000 Thanks very much interesting comments and questions. 00:50:27.000 --> 00:50:35.000 Maybe while people think of one or two I can ask a quick one. So, this delight proposal is really interesting. 00:50:35.000 --> 00:50:53.000 I think there's also another proposal for an external detector but it might be FCC E, as opposed to hh it which is the heck state detector Are you familiar with this Do you have any idea of how they would compare, or if that's fair to compare them. 00:50:53.000 --> 00:51:04.000 Yeah, so we came across this paper after we wrote it but yeah it's a very interesting proposal and it plans to cover one window that RPC server. 00:51:04.000 --> 00:51:06.000 It can have a full by coverage delight however will be more like purposeless, it will have limited Sunday dangled coverage. 00:51:06.000 --> 00:51:24.000 The light however will be more like purposeless, it will have limited Sunday dangled coverage. But it's a I mean, at this point it's difficult to say how this would both would compare. But, yeah, it can be an alternative proposal for the FCC he thinks 00:51:24.000 --> 00:51:25.000 I see a question for Michael. 00:51:25.000 --> 00:51:39.000 Yeah. And these searches for looking for decay inside the material. I can neon spectrometer so I was worried about high energy neutron interactions making a forward shower, that looks like a decay. 00:51:39.000 --> 00:51:50.000 So that is seems to be a background but when it has to cope with it so I'm looking for rare events but generally doesn't seem to be taken very seriously are underway. 00:51:50.000 --> 00:52:05.000 So here actually yeah so being a phenomenal logical study here we have been mostly not thinking more about the simulations of backgrounds but I have a slide here in the backup for backgrounds, but are you referring to this punch through jets of pileup 00:52:05.000 --> 00:52:22.000 I mean, were some neutral particles or charged particles even can punch through the perimeter material and reach them Yon spectrometer and give him. Yes, I mean that they don't have to throw away from the collision point but there are even in the back 00:52:22.000 --> 00:52:37.000 absorber there rk zeros and neutrons coming out to the bank, hours. They're not primary but their secondary or tertiary and they and they interact on nuclei made for the events the things like a decay. 00:52:37.000 --> 00:52:52.000 So, this way, the facet project, maybe you look at that. I mean, because it's a small side angle, we have much for your events than a central project, but on the other hand, even three events could be a signal because there's no background in a vacuum 00:52:52.000 --> 00:52:54.000 decay. That's. 00:52:54.000 --> 00:53:09.000 No. Yeah, I agree. And since we are not doing a proper simulation of backgrounds, we have actually kept our limits are very conservative and we have demanded 650 events so that even a significance of two sigma can accommodate around 625 background events 00:53:09.000 --> 00:53:21.000 but yes, careful study of the backgrounds, need to be done here. And then we can scale our limits accordingly. Yeah. Thank you agree. 00:53:21.000 --> 00:53:35.000 Okay, great. Thank you. And I think, in the interest of time, we should move on and further questions can be asked on matter most. And. Okay, great. Next we have Philip talking about factors factorization hidden particle production rates. 00:53:35.000 --> 00:53:37.000 Yes. 00:53:37.000 --> 00:53:42.000 Can you see me. Yes. Good. Perfect. Yes. 00:53:42.000 --> 00:53:48.000 So I hope everybody is going to enjoy the talk, I will share the screen. 00:53:48.000 --> 00:53:51.000 Can you all see the screen. 00:53:51.000 --> 00:53:54.000 Yes, I can. Great. Perfect. 00:53:54.000 --> 00:54:01.000 Yeah, so it seems to work so well. Okay, perfect. So I'll just start, I guess. 00:54:01.000 --> 00:54:05.000 Yes So good afternoon everyone. Thank you for attending my talk. 00:54:05.000 --> 00:54:14.000 My name is Philip closer and of course look at the University of bound, and I'm going to talk about fact rising hidden product production rates, and how I think they might be used. 00:54:14.000 --> 00:54:21.000 This may be useful for constraining hidden sectors in a somewhat model independent way. 00:54:21.000 --> 00:54:26.000 Okay, so well of course, why do we care about model independent constraints on hidden sectors. 00:54:26.000 --> 00:54:42.000 I mean as you're probably aware there's this huge variety of viable hidden sector models there's like actual like particles like x particles have a neutral leptons there's various Dark Matter candidates, it's very rich field. 00:54:42.000 --> 00:54:50.000 And so of course, you know, it's not always easy to see how constraints that may apply to one model can be adapted to apply to another model, and vice versa. 00:54:50.000 --> 00:55:05.000 So there's some inherent us to use to having some model independent constraints. And because this is the case, I mean a lot of work has been done, trying to get this like using EFT approaches or simplified one of the approaches and it's been overall quite 00:55:05.000 --> 00:55:19.000 successful. But it's not perfect. Then, for simplified models of course of usually you have like where we want hidden sector particle and then the mediator, and for the FTC is usually take the standard model and your extended by adding maybe a document 00:55:19.000 --> 00:55:35.000 Canada, or an excellent particle. So this overall the, the hidden sectors that you kind of look at with these kind of techniques typically tend to be rather have to be simple, And perhaps what of natural question is, can we be a bit more general Can we 00:55:35.000 --> 00:55:49.000 look at maybe more complicated in sectors maybe with a few more messengers or mediator particles. And I think that the factorization that I'm going to talk about is useful and in some ameliorating some of these issues or some of these difficulties May. 00:55:49.000 --> 00:55:54.000 Okay, so how does this work. So, 00:55:54.000 --> 00:56:04.000 so I'm considering a model that looks like this, with sentimental art, and we've got some interactive part of course and then you've got these portal operators, right. 00:56:04.000 --> 00:56:12.000 So, the portal operators they consist of stumbled upon which had no to bloom. And then some hidden sector part which I didn't notice the beam. 00:56:12.000 --> 00:56:24.000 And all of this, I like to think of this as like an effective theory LeBron and so we've integrated on all the heavy particles in your theory, and then the hidden sector understand model contain only those particles that are so relevant at this energy 00:56:24.000 --> 00:56:30.000 scale that we're looking at, and the trade off is that we have some higher dimensional grid that you also have to include in the theory. 00:56:30.000 --> 00:56:37.000 And, but the setup is of course very general because that way we include both light new particles and heavy new particles at the same time. 00:56:37.000 --> 00:56:49.000 And it's very fortunate because we have it turns out that if we have a very small portal coupling, which we need to have in order to be consistent with sort of current experimental constraints. 00:56:49.000 --> 00:57:04.000 The smallest of the crop bottle coupling by itself is already enough to ensure that there is a factorization happening in particle production rate so here you have an expression for some generic production right but you have some standard model particles 00:57:04.000 --> 00:57:17.000 that transition into some other standard model particles to notify SM prime and addition some new products so this could be either DK or some scattering, or it could be decay associated with our model collagen production faster getting sector production 00:57:17.000 --> 00:57:28.000 and the rate for this process in general will decompose into some reduced matrix elements here in the blue M. There are some model independent and independent Standard Model physics. 00:57:28.000 --> 00:57:40.000 And this, in current correlation matrix which depends only on hidden physics. And so, in particular, this means that it is independent of what kind of initial state star model particles and final state Standard Model particles. 00:57:40.000 --> 00:57:45.000 We have an SEO So in a sense, this sentence kind of observed independent. 00:57:45.000 --> 00:57:58.000 And one thing to note here is that of course if we just look extra operates, excuse me, and so we know what kind of state behalf and start modeling we have, we know what kind of state we have in the hidden sector then we just have these two hidden Kearns, 00:57:58.000 --> 00:58:12.000 but in general since the sector as well it's hidden, we have to innovate over different types of particles publicity space space and so on. And this something in integrating was mixed the two hidden current so in general we don't have them appearing individually 00:58:12.000 --> 00:58:18.000 in the rain but there will be some hidden current correlation matrix is JD that I wrote there. 00:58:18.000 --> 00:58:33.000 And I think that so this factorization is quite useful. So the first thing that immediately. So, I think is apparent is when you have this kind of rain and you have this factorization. 00:58:33.000 --> 00:58:48.000 That makes it easier to sort of adapt a rate to a new model or to an observable so on the one hand if you have an existing rate, and your model builder you want to adapt this rate for a constraint for this observer to some new model. 00:58:48.000 --> 00:58:54.000 You don't have to re compute the witness matrix elements because then we're independent. You only have to compute the hidden occurrence. 00:58:54.000 --> 00:59:03.000 And on the other hand, if you have some new observable that you want to look at and you have an existing model. You don't have to re compute the hidden currents, because, well, they are the same. 00:59:03.000 --> 00:59:11.000 They don't depend on the model that you're looking at. And you only have to compute these reduced matrix elements. So I think that is quite a useful thing. 00:59:11.000 --> 00:59:22.000 And then the second thing is that well so far we've not talked really about what kind of operators, you can have them but bottle of brandy. Right. And depending on what kind of operators have, you have you will have different features matrix elements 00:59:22.000 --> 00:59:36.000 you would have different routing currents. But in general, you can just write down a list of interactions right you can using certain assumptions maybe assuming some cemeteries, you can write sort of a causal effect of theory that encompasses all the 00:59:36.000 --> 00:59:49.000 relevant portal operators that can potentially contribute to the process you're looking at and if you have such a complete basis, then you can use this factorization to obtain serve model independent master formula for this decay rate. 00:59:49.000 --> 00:59:55.000 And this also means that you can then have some model independent constraints on these hidden currents. 00:59:55.000 --> 01:00:19.000 And with these model independent constraints on these are the hidden currents of your armpit that you can serve like easily or relatively easily I think compare and contrast different models because you just look at the predictions for the hidden costs 01:00:19.000 --> 01:00:20.000 be just model independent predicted by the experiment of thing. They depend on the experiment that we're looking at. 01:00:20.000 --> 01:00:25.000 if you haven't one model versus another model maybe like an actual like particle versus a light Higgs particle, and they will have different predictions but in terms of what the hidden curves look like but the constraints on the hidden currents they will 01:00:25.000 --> 01:00:36.000 Okay, so this is all very nice but it's a bit abstract, so I wanted to also show kind of what this looks like and some more concrete terms, and for to do so. 01:00:36.000 --> 01:00:48.000 I want to look at this, I want to do this, this computation for this master eight. For an example process of the process that I'm looking at is charged Tandy case into charge laptop plus some new physics. 01:00:48.000 --> 01:00:59.000 And the reason why I chose this process is because it's quite simple there's only two portal operators, but it's not entirely trivial right there's the two portal operators and this allows us to see some interesting features. 01:00:59.000 --> 01:01:04.000 So, first of all, from the portal operators, you can. 01:01:04.000 --> 01:01:13.000 There's a process away you can get some corresponding portal vertices. And these portal vertices essentially they function like regular what this is, except that there's some missing mass. 01:01:13.000 --> 01:01:26.000 So if you look at like, what a computer connected with just matrix elements. This just matrix elements you compute this using the standard fine minerals that you use for everything else except that at some point there's this portal vertex that carries 01:01:26.000 --> 01:01:38.000 off some momentum into the hidden sector and you don't really further care about what happens to this momentum for the purpose of computing to resubmit this these reduce matrix limits. 01:01:38.000 --> 01:01:54.000 And on the other side if you're looking at the hidden currents. Again, there's some, they could get computed basically in the same way as normal matrix elements, except that at some point you have a contribute hidden vertex were some, you have some influencing 01:01:54.000 --> 01:02:08.000 right that comes from the visible sector, but for the purpose of computing these hidden currents, you don't really care what has happened on the hidden on the visible side to produce this influencing missing mass. Okay. And then once you have these portal vertices. 01:02:08.000 --> 01:02:23.000 Then you can use standard fundamental rules to come to sort of compute the legislators elements in this case here we have to, we just made it elements, one for each of the potter parents portal operators, and then because we have to reduce matrix elements 01:02:23.000 --> 01:02:39.000 we also have to hidden currents. And then once we do this, this Face Face integration, this will leaders, give us three hidden current coordinators. So, I mean, you might think should be four because it's a two by two matrix, but this matrix has to be 01:02:39.000 --> 01:02:46.000 symmetric or it actually has to be permission. And so there's only three hidden current correlated Robin for. 01:02:46.000 --> 01:02:50.000 And then what you find in the end is this, this result. 01:02:50.000 --> 01:03:06.000 So where we have the generic rate for producing some hidden sector particles and what I want to stress is that this is a rate for producing an arbitrary number of particles with generic sense so it's it's really a very general result. 01:03:06.000 --> 01:03:19.000 And then, of course, because this depends on the kind of missing mass that you have right you will have different rate depending on what the same mass you have this is actually like a differential with where you have the width per some been of missing 01:03:19.000 --> 01:03:37.000 mass, and you can just basically i mean i guess the result in itself is not super spectacular because you just find that you can basically pyramids rise in this in terms of in terms of form factor f of x, but the kind of the meat of the formalism is that 01:03:37.000 --> 01:03:52.000 you can then you have these model independent constraints on the, on the form factor, and using the final rules to compute these different Heron currents, you can sort of relatively easy then compare and contrast different in Sector models like you can 01:03:52.000 --> 01:04:06.000 compute them for some HTML or something more specific. And then you can see immediately. What is model independent constraints on F say about the different parameters in various models. 01:04:06.000 --> 01:04:10.000 Okay. So, to summarize. 01:04:10.000 --> 01:04:18.000 The first thing that I did in the paper is like we showed this shot this is factorization. 01:04:18.000 --> 01:04:35.000 And I argue that using this factorization. You can more easily adapt rates to new models or new observable and if you combine the factorization with some bottle effective theories, then this allows you to relatively systematically compute model independent 01:04:35.000 --> 01:04:49.000 constraints on certain well on hidden sectors that you can then also in the second step, used to set relatively easily compare different hidden sector models. 01:04:49.000 --> 01:05:02.000 And to show how this works in practice I computed this most general Kalan to charge that on the physics decay rate, where you then have this form factor f of x. 01:05:02.000 --> 01:05:12.000 And then also in the paper I also derived some model independent constraints on FX by reinterpreting an existing search from 62. 01:05:12.000 --> 01:05:27.000 Okay and so then this is all I think very nice but this, I mean, of course, there's a lot of work to do. So one thing that I would like to do in the future is I would like to extend this kind of description to systems with hidden particles in the, in 01:05:27.000 --> 01:05:38.000 the initial stage so you can have maybe some, some situation where you can think of like a hidden particle scattering of a fundamental particle, or maybe to find that temperature situation so that you can apply this not just to collider physics and fixed 01:05:38.000 --> 01:05:44.000 target experiments, but maybe also to some other use cases maybe something in the early universe. 01:05:44.000 --> 01:05:52.000 And then the other thing, main thing to do of course is to use this factorization compute lots of production rates and hidden currents for various models. 01:05:52.000 --> 01:06:05.000 So ideally, I would like to have sort of some libraries of pre existing results for just matrix elements for certain observable and hidden currents for various models so people can just mix and match these things if they want to. 01:06:05.000 --> 01:06:08.000 Hey, thanks for your attention. 01:06:08.000 --> 01:06:25.000 Thank you very much. Questions. 01:06:25.000 --> 01:06:33.000 Oh, I thought Jose unmuted but then I didn't couldn't hear him and now sorry I was trying to block my child while I unmuted. 01:06:33.000 --> 01:06:47.000 So the thing I wanted to ask is, I think it's a very nice language to essentially, write down everything in terms of parents and then, and then try to see if you could use those tools to put bounce, but it is always going to happen so imagine that that 01:06:47.000 --> 01:06:56.000 you do let something like effect for a reference or you look for something in outer space where they're fed setup and processor you don't have a colliders. 01:06:56.000 --> 01:07:06.000 So it's already signed aesthetic, look for a backdoor solidifying work for scalars of preparing meals because you do dangle a carrot or something like that. 01:07:06.000 --> 01:07:22.000 So you see, it always obvious that an experimental research, coming from a surgery involved certain selection cuts and so on, can be put forward always sort of model independent way in this language so for sure future predictions can, but you know when 01:07:22.000 --> 01:07:28.000 you want to do them up to strike from data if, if this will be failsafe. 01:07:28.000 --> 01:07:44.000 So I think I mean so in order to have this this factorization. I mean I guess I mean, maybe I can paraphrase your question to see find a standard. So you're asking if this factorization how general the factorization is I guess right what are the limits. 01:07:44.000 --> 01:07:59.000 But yes, hardly ever mostly the applicability for data, right, for theory I have no no no no issues with the, with the proposal. But then if you think I said that even amongst experimental late and you want to put it in this language and being fully mother 01:07:59.000 --> 01:08:06.000 independent Kalka well this will work. I think so, I mean, For example, if you have a missing mass search. 01:08:06.000 --> 01:08:14.000 Then you immediately I think this should work for because you're in the missing masters right you don't see the in particle you just see something, leaving the detector. 01:08:14.000 --> 01:08:27.000 And so then of course if you have something that became within the detector. On the one hand, you've got the production rate, which I would argue here you can sort of probably cost in this model independent wait but then you would also have to think about 01:08:27.000 --> 01:08:41.000 the D change right and so what I'm doing here is at the moment only looking at the case at the production of the in particle but not in the structure for this part of the reason why I would like to look at situations but you have also hidden particles 01:08:41.000 --> 01:08:43.000 and the initial step because then you could. 01:08:43.000 --> 01:08:50.000 This is my hope anyway, so it's like describe both sides of this in the model independent way but for the moment. 01:08:50.000 --> 01:09:01.000 This only applies to production. So say you have. I know you produce something like an excellent article in the detector, and then you either have this actual like particle lever detector entirely. 01:09:01.000 --> 01:09:05.000 Right, then this works, or yourself. 01:09:05.000 --> 01:09:16.000 Maybe you think okay all of the extra like particles that are produced well the tape will decay in the detector right this case you don't have to worry about what the Raiders maybe then there's somewhat of the pendants coming in from the botulism zk side 01:09:16.000 --> 01:09:35.000 and so on. But, so, it depends. I think the month, I think so. 01:09:35.000 --> 01:09:41.000 Okay now that makes sense. definitely k we need to think about. Thank you. 01:09:41.000 --> 01:10:05.000 Okay, thank you.