WEBVTT 1 00:00:01.890 --> 00:00:02.879 José Zurita: Thank you very much. 2 00:00:03.629 --> 00:00:04.770 José Zurita: I know you got that. 3 00:00:05.910 --> 00:00:11.519 Alberto Escalante Del Valle: Right good Hello everybody, and this is going to be a talk about. 4 00:00:11.550 --> 00:00:13.170 Alberto Escalante Del Valle: Gaps overlaps and. 5 00:00:13.170 --> 00:00:19.410 Alberto Escalante Del Valle: Complementarity in recent llc searches so before I start, let me just. 6 00:00:19.620 --> 00:00:20.190 Stress. 7 00:00:21.990 --> 00:00:23.130 Alberto Escalante Del Valle: Someone I think he's typing. 8 00:00:26.070 --> 00:00:26.520 Benjamin Kerridge: effects. 9 00:00:27.300 --> 00:00:39.390 Alberto Escalante Del Valle: So this talk with focus on on my view on the topic focusing and recent results at the llc and before starting I wanted to mention that they find the expanding. 10 00:00:40.140 --> 00:00:49.140 Alberto Escalante Del Valle: Expanding LP search program impressive and full of creativity and brilliant ideas we have seen a boost in the past years in a number of. 11 00:00:49.560 --> 00:01:05.100 Alberto Escalante Del Valle: very quick searches and he knows searches and, more recently, recently, there are plenty of new results in direct searches for for Ireland piece, at the same time, while preparing this talk, I tried to address where can we do better, and if there is some room for interest. 12 00:01:06.780 --> 00:01:15.360 Alberto Escalante Del Valle: So let's get started we'll start with the agent else here, put the references to the searches that i've used to prepare the talk. 13 00:01:16.590 --> 00:01:17.010 Alberto Escalante Del Valle: and 14 00:01:18.360 --> 00:01:32.430 Alberto Escalante Del Valle: And let's get started, so he nails they're very searches for other piece targeting channels and they're all looking for a channels producing in w decades, and this has the advantage that you have a problem leptin is used. 15 00:01:33.000 --> 00:01:52.200 Alberto Escalante Del Valle: For triggering your searches for from atlas cms and led you're you're all looking at the casing the tracker in various final states so between atlas and cms essentially you cover all types of displays leptons now at CBS looking at similar tonic case. 16 00:01:53.580 --> 00:02:03.870 Alberto Escalante Del Valle: Now the obvious ways of extending these is to look at other production mechanisms for example K, in the case for heavy they flavor the case or even some beer some objects. 17 00:02:04.290 --> 00:02:20.790 Alberto Escalante Del Valle: Now the key thing is that you shouldn't have done that the problem for for triggering and then you can look at other a channel decay modes, for example, hydraulic The case of virtual ws or CDs, or even final states involving 100 times. 18 00:02:21.810 --> 00:02:29.310 Alberto Escalante Del Valle: But let's get back to to the results and here here hand drawn a comparison between atlas em so let's be unhealthy. 19 00:02:29.760 --> 00:02:39.630 Alberto Escalante Del Valle: For the mix it with the electron and the meeting with me on as a function of the original mass and here, will you see, for example, if you go to the high lifetime to smaller mixing. 20 00:02:40.380 --> 00:02:52.200 Alberto Escalante Del Valle: Above to gv adolescent cms have pretty much comparable sensitivity, while cms has better sensitivity different prompt like, and this is because the searches goes to a smaller displacement. 21 00:02:53.160 --> 00:03:08.280 Alberto Escalante Del Valle: Now elysee be you see it here starts at five TV and typically covers the region with more prompt like a channels and, in fact, you see here comparison with a cms prom search that it covers similar faces. 22 00:03:09.630 --> 00:03:15.570 Alberto Escalante Del Valle: Now, in terms of possible expansions when can think of scanning different mixing angles. 23 00:03:16.350 --> 00:03:24.570 Alberto Escalante Del Valle: Protect particular the mixing with the tower, this is something that is this let's explore less constrained, and one can connect with more realistic scenarios, for example with. 24 00:03:24.930 --> 00:03:32.670 Alberto Escalante Del Valle: Looking at what's allowed from neutrinos elation, and this is something that he was done in the latest result from from address found is pretty Nice. 25 00:03:33.570 --> 00:03:43.890 Alberto Escalante Del Valle: When can also go to the bottom left diagonal this is smaller much smaller masses and longer lifetimes and hear what you have is the case, beyond the tracker. 26 00:03:44.310 --> 00:04:00.600 Alberto Escalante Del Valle: And I find this interesting because this can be used to trigger on displays decay products, and this can be a good way to target for example he knows producing indicators and then Lastly, you have he knows be undetected and these can be searched in the missing mass distribution. 27 00:04:02.580 --> 00:04:08.250 Alberto Escalante Del Valle: And finally, these searches look at a channels, but if you look at the final state, you can have. 28 00:04:08.730 --> 00:04:14.580 Alberto Escalante Del Valle: Similar objects, for example, if you look at associated production of the higgs boson with proposals. 29 00:04:15.030 --> 00:04:29.010 Alberto Escalante Del Valle: And you've seen the talk that there are many searches for hicks read the case, so I think these searches have good since the DVD but so far there is not an interpretation just be on a channel, so I think this is something that I will be interested to to see in the future. 30 00:04:30.450 --> 00:04:42.750 Alberto Escalante Del Valle: So this connects with the next topic i'm going to talk about her hicks ready case i'm going to focus first on on hydroponic funnel States here the short dislike lifetimes and talking about the case in the tracker. 31 00:04:43.860 --> 00:04:51.660 Alberto Escalante Del Valle: Their searches, looking at the associated production that they just described so right here the case, and then the prompt letters from the from the sea. 32 00:04:52.320 --> 00:05:08.700 Alberto Escalante Del Valle: And here we have results in terms of the signal rate as a function of the lifetime or adolescent cms and what I want to highlight here is the lowest math I think this is the most interesting where you can see that the Atlas results are a little bit better than than the same as ones. 33 00:05:09.780 --> 00:05:20.520 Alberto Escalante Del Valle: Now, when you look at higher masters and higher lifetimes here want to highlight the 55 GB hypotheses and cms is stronger than an atlas. 34 00:05:21.840 --> 00:05:30.420 Alberto Escalante Del Valle: Now i'm going to stick to the same a 55 GB and now i'm going to compare with a more inclusive search targeting glue glue fusion. 35 00:05:30.900 --> 00:05:43.650 Alberto Escalante Del Valle: Here the advantages that you didn't have they didn't pay the penalty in signal rate coming from the associated production, and you can see that this is sufficient to beat the results of this city production at high masses. 36 00:05:44.910 --> 00:05:54.060 Alberto Escalante Del Valle: Here there are no equivalent interpretation from atlas will not discuss this and I finished just by saying that I think for the associated production, one can. 37 00:05:54.510 --> 00:06:12.000 Alberto Escalante Del Valle: You know 40 some much lower masses profiting from the prompt the leptin triggers and targeting the most challenging signatures say hydrating tabs, for example, and also that there are no associated production searches beyond a dilettante one can think of web for Tiki bar. 38 00:06:13.740 --> 00:06:24.540 Alberto Escalante Del Valle: Now, at higher masses or googling fish, and there is also search from LCD you can see the constraints of the search or weaker to the one from cms. 39 00:06:25.290 --> 00:06:33.660 Alberto Escalante Del Valle: Now something to mention here is that this is an old search, this is from 2017 so I look forward to more updated results from cms. 40 00:06:34.470 --> 00:06:49.050 Alberto Escalante Del Valle: Sorry from from LDC be and I think that there's room for improvement, especially at the lowest masses you see here 25 TV, this is already at the branch ratio larger than unity, so I think this is also something to to look to see for updates in the future. 41 00:06:50.310 --> 00:06:52.200 Alberto Escalante Del Valle: now going to hire lifetimes. 42 00:06:53.280 --> 00:07:06.540 Alberto Escalante Del Valle: Now you see here this new search is coming up here in blue, and all this cluster of searches, a typical emitter lifetime, and these are searches in the age color in immune system and they pretty much expanded the cto coverage. 43 00:07:07.800 --> 00:07:20.160 Alberto Escalante Del Valle: So i'm going to finish with the with the searches in the tracker by saying that I think the way to go with the most promising is to really focus on the on the low mass and be searches with tracker lifetimes by going into. 44 00:07:20.880 --> 00:07:32.070 Alberto Escalante Del Valle: The targeting the most challenging scenarios, as I said before joining towers compressed and boosted and here for global fusion charities, one has to go to dedicated triggers and machine learning. 45 00:07:34.200 --> 00:07:39.330 Alberto Escalante Del Valle: But let's now switch to the highest lifetimes So these are searches, as I mentioned in the immune system. 46 00:07:39.780 --> 00:07:53.610 Alberto Escalante Del Valle: And here it's interesting that adolescent cms have very different strategies so unless he's looking for this place where this is the immune system, while cms is looking for a hydrant showering immune system. 47 00:07:54.450 --> 00:08:03.030 Alberto Escalante Del Valle: Now one key difference is is the trigger that is us atlas has a dedicated trigger in the new system, while cms is relying on the vicinity. 48 00:08:03.570 --> 00:08:20.550 Alberto Escalante Del Valle: For those not familiar, this is based on coloring meeting information and the idea for atlas is to look for to displace vertices that are isolated from inner detector and hedonic activity wise for cms is to have a very large multiplicity in the CSC. 49 00:08:22.140 --> 00:08:32.490 Alberto Escalante Del Valle: Now, one thing that could be done, and this is the easy one, is to cross the strategies so for our last trigger miss Nikki and for cms to develop a dedicated triggering immune system. 50 00:08:34.860 --> 00:08:42.870 Alberto Escalante Del Valle: Now let's stick to the to the results and you would see that, despite the different strategies that the sensitivities not so different, they are comparable. 51 00:08:43.680 --> 00:08:59.280 Alberto Escalante Del Valle: Something to mention before I forget is that the models are not exactly the same atlas is is having the branching ratios according to to to a model, while what cms has more benchmark model where the branch E ratio for this plug this one to be the buyer. 52 00:09:00.810 --> 00:09:11.610 Alberto Escalante Del Valle: So, thanks to note here, for example, if you look at atlas you would see that for low masses here in blue and for more compressed scenarios here in red is a degradation insensitivity. 53 00:09:12.510 --> 00:09:24.060 Alberto Escalante Del Valle: Also, if you compare the cms there's no TAO hedonic interpretation now looking at cms you will not find a bsm his kicks interpretation that we see you know, had left. 54 00:09:24.930 --> 00:09:44.580 Alberto Escalante Del Valle: And in terms of expanding the REACH, we can see, for example, for atlas that you could increase the cincy DVD at high lifetimes by just requiring one displays for addicts and for cms by expanding the decay volume, so we can think of the case in the viral or the case in the in the age. 55 00:09:47.040 --> 00:09:55.920 Alberto Escalante Del Valle: and other things to note that I think they're interested in is what is their complementarity with Hickson invisible searches that certainly they contribute at JAI sita. 56 00:09:56.910 --> 00:10:03.930 Alberto Escalante Del Valle: One can also think of signal regions with prom leptons and, as I mentioned before, this can be used to target very loud lifter a channels. 57 00:10:04.800 --> 00:10:17.130 Alberto Escalante Del Valle: And lastly, all the searches are very inclusive and the you're sensitive to a very wide range of LP scenarios will be interesting to see what's the sensitivity to our showers merging jets and split or our TV. 58 00:10:20.190 --> 00:10:21.540 Alberto Escalante Del Valle: Now, when can go farther. 59 00:10:23.280 --> 00:10:32.130 Alberto Escalante Del Valle: Before in the detector, so this is in the html, and this is something interesting that that Alice is doing, relying on a dedicated trigger is called the color ratio. 60 00:10:32.910 --> 00:10:40.650 Alberto Escalante Del Valle: So you can see here the comparison to searches in calorie meter to searches in the immune system for two different masters. 61 00:10:41.580 --> 00:10:49.800 Alberto Escalante Del Valle: Now, because the decay volume it's a smaller This makes the sensitivity, difficult to compete with searches in immune system. 62 00:10:50.370 --> 00:11:08.160 Alberto Escalante Del Valle: But the way I see this is that they provide sensitivity very short lifetimes, but they also provide an important channel in case of an access, and this is more important given the fact that there is no equivalent searching in cms at the moment. 63 00:11:09.510 --> 00:11:28.470 Alberto Escalante Del Valle: Another thing that is interesting of these searches, is that they are used to look for consummated electrons for light hydrants was extremely low masses and here want to highlight discouraged here in blue for a 17 MTV hypothesis so really, really low mass is really big and unique. 64 00:11:29.520 --> 00:11:31.710 Alberto Escalante Del Valle: Area of the face space for for advice here. 65 00:11:32.850 --> 00:11:40.650 Alberto Escalante Del Valle: i'm going to change topic we're going to discuss non drunk final states seeking again to turn 60 days. 66 00:11:42.960 --> 00:11:44.670 Alberto Escalante Del Valle: i'm going to i'm going to start with the. 67 00:11:45.990 --> 00:11:52.890 Alberto Escalante Del Valle: classic one and displace dialect on vertex, this is a generic well motivated in many scenarios. 68 00:11:54.030 --> 00:11:59.430 Alberto Escalante Del Valle: And i'm going to start with the moon's they're very useful just going to start with this one in blue. 69 00:12:00.060 --> 00:12:10.950 Alberto Escalante Del Valle: This is an old one based on 2016 data in atlas, and this is done in the immune system alone, and you can see that the sensitivity starts around point one centimeter. 70 00:12:11.850 --> 00:12:20.100 Alberto Escalante Del Valle: And this is limited to small opening angle, due to the trigger that he used now earlier this year and cms release research. 71 00:12:20.580 --> 00:12:26.880 Alberto Escalante Del Valle: Abuses a combination of tracker immune system that covers a wide range of see power for me from my computer two kilometer. 72 00:12:27.810 --> 00:12:38.070 Alberto Escalante Del Valle: And this one was limited by by the trigger efficiency and then lastly here in red you see a search for displays i'm using the tracker this is done with scouting data. 73 00:12:38.880 --> 00:12:48.150 Alberto Escalante Del Valle: And this puts the stringent score strains for a typical track your lifetime and this one is limited by requiring Damien very this is in the pixel tracker. 74 00:12:49.200 --> 00:13:02.430 Alberto Escalante Del Valle: Now something to note is that have I have not mentioned searches for dielectric for lighthouse from a coma vertex a 13 TV, and this is because there are no no results from for many of their experiments. 75 00:13:03.570 --> 00:13:06.960 Alberto Escalante Del Valle: Now, in all cases, I think there is room for improvement. 76 00:13:07.980 --> 00:13:13.830 Alberto Escalante Del Valle: By the by the development of have dedicated and improved the triggers. 77 00:13:15.960 --> 00:13:30.090 Alberto Escalante Del Valle: Now i'm going to focus on low masses and here we have a search from atlas looking at me or call them at the lectures meals are like jets whether they are in H calm or in the immune system. 78 00:13:30.870 --> 00:13:41.190 Alberto Escalante Del Valle: The one that I mentioned from cms scouting, and here I want to stress that this goes, all the way down to the diner festival, and the knowledge to be looking at prompt or displaced i'm us. 79 00:13:42.180 --> 00:13:54.660 Alberto Escalante Del Valle: Now something to note here you're not hearing all the plots the X axis is the mass is that there is a little overlap between all these searches so, for example, unless here and stops to gv. 80 00:13:55.860 --> 00:14:07.980 Alberto Escalante Del Valle: And cms stops in the lower end point five, this plot and then llc be covers the intermediate part and the Gray bank response to regions between two backgrounds. 81 00:14:09.300 --> 00:14:19.410 Alberto Escalante Del Valle: Now something to to highlight here is that there is unique sensitivity for address below 210 nev using the electrons. 82 00:14:19.830 --> 00:14:35.580 Alberto Escalante Del Valle: And here I think Alex ED has a lot to say there are promising prospects for a prime to he searches now in terms of displacement it's a bit hard to compare, especially with led because the production mechanism is different for for these analysis. 83 00:14:36.630 --> 00:14:43.140 Alberto Escalante Del Valle: But address is going to further out in the detector by looking at the case in the Ms and the edge calm. 84 00:14:45.660 --> 00:14:55.260 Alberto Escalante Del Valle: Now sticking to low masses an interesting and challenging experimentally scenario is a production of this place, for this is in hedge flavor the case. 85 00:14:55.800 --> 00:15:08.130 Alberto Escalante Del Valle: And this is something that was prob by cms and led with damien's I haven't seen an equivalent one for atlas, and this is a result of these comparison from from a cms result. 86 00:15:09.300 --> 00:15:19.590 Alberto Escalante Del Valle: So something to keep in mind is that there are some assumptions done here in terms of how the signal is produced so in order to make a comparison. 87 00:15:20.490 --> 00:15:36.300 Alberto Escalante Del Valle: But the take home message of this plot is typically cms gain sensitivity, as you go to higher masses, while the CB has a unique sensitivity, when you go to the lowest prices something also to mention is that this is not the latest. 88 00:15:38.310 --> 00:15:47.760 Alberto Escalante Del Valle: displays me and resolve this is one from from 2015 2017 so this could be a possibility with with more recent results. 89 00:15:48.990 --> 00:16:01.980 Alberto Escalante Del Valle: And so, something to note that would facilitate comparison between the experiments, is that it would be nice, for example, to have the hidden a billion hits model for LDC be This is something that is widely used in adolescent cms. 90 00:16:03.390 --> 00:16:14.790 Alberto Escalante Del Valle: Now the other hand, adolescent cms do not have interpretations without intermediate hicks so it becomes a prime to F bar and then for unless we could look at every flavor decades. 91 00:16:15.780 --> 00:16:30.900 Alberto Escalante Del Valle: Now, also, I think all these little messages could be made sensitive to H and helps with minor modifications think I don't know what is the sensitivity, but I think this This is something that will be interesting to to see I think they could be competitive. 92 00:16:33.330 --> 00:16:48.300 Alberto Escalante Del Valle: Now i'm going to move to two photons and he said delight photos in the car and here they're different strategies between atlas and cms unless he's looking in a jms be a model in your benchmark we're. 93 00:16:49.500 --> 00:16:57.180 Alberto Escalante Del Valle: Developing piece or producing Jerry hicks the case but cms is looking at GM is this Lucy for samples course squirts. 94 00:16:58.410 --> 00:17:01.560 Alberto Escalante Del Valle: With this benchmark point this so called SPS and. 95 00:17:02.880 --> 00:17:11.430 Alberto Escalante Del Valle: Now the key difference between the two searches, is how they trigger the events, you can see, for address that they rely on single leptin triggers. 96 00:17:11.820 --> 00:17:21.780 Alberto Escalante Del Valle: You see, for example, you can target the the associated production well for cms you have a dedicated trigger for nonprofit non non pointing photons. 97 00:17:22.560 --> 00:17:38.340 Alberto Escalante Del Valle: And this also includes some other eight requirement on hd so as a result, you have, for example, tighter requirements on a nice unity for cms compared to atlas but then you have the requirement on the left on the Left hands for for atlas. 98 00:17:40.890 --> 00:18:00.060 Alberto Escalante Del Valle: All these differences make make quite different analysis at the end of the day, and if you see the results, these are done in two different models that essentially make the comparison almost impossible to do so here it's very hard to to draw any any conclusion. 99 00:18:01.980 --> 00:18:08.430 Alberto Escalante Del Valle: And so, finally, just few words about hydroponic and non hedonic. 100 00:18:09.630 --> 00:18:17.700 Alberto Escalante Del Valle: If the typical branch ratio is comparable between the two final states, you see here in the summer, you plot that non hydroponic searches have. 101 00:18:18.000 --> 00:18:29.670 Alberto Escalante Del Valle: This titus constraints, for all the lifetimes essentially, but of course this statement strongly depends on the branch and ratio and typically when has a larger branching ratio in hundred final states. 102 00:18:31.110 --> 00:18:40.380 Alberto Escalante Del Valle: which makes the complementarity between finance states and exploring the full coverage, the key to maximize their discovery potential. 103 00:18:43.260 --> 00:18:53.970 Alberto Escalante Del Valle: So this brings me to to the last topic of the talk, where I want to discuss sushi and charge the Long live particles want to start with indirect detection. 104 00:18:55.260 --> 00:19:06.930 Alberto Escalante Del Valle: And this is something that you can have, for example, rpc you have to stop the cane to leptin and a jet miss Emily Tony bk, and this is done by add last. 105 00:19:08.340 --> 00:19:25.440 Alberto Escalante Del Valle: Looking at our PV stops, so this is the results of the search and then in cms you have a displaced jet and displace laptop So this is the result, one of them from cms In both cases, the results are shown in terms of the lifetime as a function of the mass of the STOP. 106 00:19:26.640 --> 00:19:33.990 Alberto Escalante Del Valle: For both our lesson cms so you will be tempted to compare them, but then, as usual, the devil is in the detail, both. 107 00:19:34.470 --> 00:19:46.470 Alberto Escalante Del Valle: have different assumptions on the rtb kathleen's most notable difference is that for the last one, one is you know switching the captains that lead to finance states with with the moons. 108 00:19:47.220 --> 00:19:58.470 Alberto Escalante Del Valle: And this makes the direct comparison not possible, so I think I would say is that I think that the cms approach is more inclusive just because it doesn't rely on the presence of a problem of from you. 109 00:20:00.750 --> 00:20:14.490 Alberto Escalante Del Valle: Now sticking to our PVC, if you see, there are different interpretations for different searches So these are the three that I discuss now we're bringing another one this, this is a recent one for LDC be again looking at. 110 00:20:15.090 --> 00:20:22.320 Alberto Escalante Del Valle: Some electronic the case very interesting search model is the scenario is different, this is a neutralino. 111 00:20:23.220 --> 00:20:38.700 Alberto Escalante Del Valle: With a different production mechanism and is probably lower masses so in general, this is also not so easy to compare and I think there is there is a need for a more systematic approach to the IPCC coverage, and this would facilitate the comparison between between the experiments. 112 00:20:39.150 --> 00:20:40.380 Alberto Escalante Del Valle: Something like minutes left. 113 00:20:40.830 --> 00:20:42.300 Alberto Escalante Del Valle: Okay, something. 114 00:20:43.110 --> 00:20:54.660 Alberto Escalante Del Valle: Something that I liked that it was done in 2018 was this it was mentioned in the first talk this rpg meets rpc and this had a systematic coverage of rpg searches in our class. 115 00:20:56.280 --> 00:21:09.060 Alberto Escalante Del Valle: Okay, I moved to display style leptons so typically one you can target slept on of different flavors you have used me on selection and stout and if you compare our lesson cms. 116 00:21:09.990 --> 00:21:18.150 Alberto Escalante Del Valle: And you have you see that cms sets the stronger limits are destroyed their lifetimes you have to compare these two lines here. 117 00:21:19.440 --> 00:21:27.660 Alberto Escalante Del Valle: Now, at higher lifetime, is the way around, and this is all driven by the this year requirements and this comes basically from from the electrons. 118 00:21:28.680 --> 00:21:36.810 Alberto Escalante Del Valle: And I think you there is a possibility to expand to even higher lifetimes by going to to leptons produce beyond the tracker. 119 00:21:37.860 --> 00:21:44.850 Alberto Escalante Del Valle: also want can think of signal regions with non isolated displays leptons to make this the searchers even more modern independent. 120 00:21:46.590 --> 00:22:00.600 Alberto Escalante Del Valle: Now something also to mention is that the leptin PT requirements are quite tight for the searches to pro very low masses, so I think there are possibilities to lower them with dedicated triggers and also, if you look at the red curse here and stout. 121 00:22:02.010 --> 00:22:13.950 Alberto Escalante Del Valle: This these are weaker constraints, and this is because there are no dedicated signal regions with reconstructed hydroponic house, I think this is also something important for the future. 122 00:22:15.450 --> 00:22:24.720 Alberto Escalante Del Valle: This brings me to the last topic, and this, you were probably all aware about the access in the dx, so this is a hot hot topic. 123 00:22:25.560 --> 00:22:36.960 Alberto Escalante Del Valle: So, as you know, these are seven events this drives This leads to a 3.3 global access coming from events that were measured with a non relativistic beta from the dx measurement. 124 00:22:37.800 --> 00:22:52.170 Alberto Escalante Del Valle: But then when you look at the time of flight measurement from coloring meter immune system, all these events were found compatible with would be taken one, so the summary is that the success was not compatible with the considered LP signal. 125 00:22:53.550 --> 00:23:10.500 Alberto Escalante Del Valle: So i'm not going to discuss the details of that search, I wanted to discuss what to expect in in other searches potential complementarity and something to mention is that whatever we see it should come with an anomalous the dx because this is what triggered the whole access. 126 00:23:11.520 --> 00:23:22.950 Alberto Escalante Del Valle: So, if this is coming from something with multi charged so two times three times four times the electric charge, this would show up in a multi charged particle search. 127 00:23:23.580 --> 00:23:36.630 Alberto Escalante Del Valle: This is something that was released this year in LCP and you can see, so this didn't confirm the access and this was based on the dx immune system mdt or in the security. 128 00:23:38.550 --> 00:23:45.930 Alberto Escalante Del Valle: Now other possibility, and here I go back to one of the limits from from the paper that. 129 00:23:46.770 --> 00:24:04.380 Alberto Escalante Del Valle: The access would be compatible with with nlp with the with a lifetime say between three to 10 nanosecond and I highlight this this window a lifetime, because this is where the disappearing track has sensitivity, so I think for some lifetimes you could have a signal in one of these searches. 130 00:24:06.150 --> 00:24:20.700 Alberto Escalante Del Valle: Similar window it's also probed by our last disappearing track the maximum sensitivity for atlas is achieved at the bit lower lifetime compared to cms but still, it should have good sensitivity, if this is the case. 131 00:24:21.720 --> 00:24:32.130 Alberto Escalante Del Valle: And the last meet if the beat is smaller than one in state and it's stable, this could show up in the stock article search on tracker plus the time of flight is. 132 00:24:33.120 --> 00:24:43.320 Alberto Escalante Del Valle: Probably, this is the most interesting one, and the latest results, it was from cms in 2016 with partial data and he didn't see any access. 133 00:24:43.890 --> 00:24:50.070 Alberto Escalante Del Valle: But this should be updated, with the full time to data now here I didn't mention ltv. 134 00:24:50.610 --> 00:25:04.500 Alberto Escalante Del Valle: But something to mention is that atlas Elizabeth did a direct detection search back in 2015 with the leak detector so it will be, it will be good to see fallacy be has something that can be done in case the successes. 135 00:25:04.530 --> 00:25:05.220 José Zurita: history of them. 136 00:25:05.310 --> 00:25:07.500 Alberto Escalante Del Valle: And i'm not aware of anything more recent. 137 00:25:09.270 --> 00:25:15.660 Alberto Escalante Del Valle: Now long story short, is that so far there is no any other access in any other direct detection. 138 00:25:17.400 --> 00:25:28.770 Alberto Escalante Del Valle: And this brings me to the summary and the outlook, I think there is an impressive neutral research program ideally see there is still some room for improvement in the most challenging reduce the face base. 139 00:25:29.880 --> 00:25:40.020 Alberto Escalante Del Valle: And the direct comparison between experiments is sometimes possible, and this is for the case where searches the experiments provide results in benchmark models. 140 00:25:41.040 --> 00:25:54.210 Alberto Escalante Del Valle: Now direct searches for our piece are highly motivated, regardless of the access and I think the key is that the complimentary signatures and various other factors will be vital to confirm a possible observation. 141 00:25:55.140 --> 00:26:04.980 Alberto Escalante Del Valle: And then, finally, I think I expect massive gazing sensitivity in inventory for LP searches sang with respect to run to. 142 00:26:05.700 --> 00:26:16.530 Alberto Escalante Del Valle: And this will be driven thanks to all the developments on the trigger side i'm improved analysis techniques and yeah I really look forward to it, and later they came around the corner. 143 00:26:18.270 --> 00:26:32.070 José Zurita: Okay, thank you very much, have a nice interesting display of the interplay between the three main factors Oh, we open the law or questions before I have used my chair power and ask you a bunch of things. 144 00:26:35.640 --> 00:26:39.180 José Zurita: Okay, so a cheetah we go first. 145 00:26:40.770 --> 00:26:49.740 Suchita Kulkarni: Pilot so quick question on the various beginning of the slides you were talking about reinterpreting hl searches for each to XX can you go back to that because i'm. 146 00:26:52.200 --> 00:26:55.950 Suchita Kulkarni: i'm not sure, because his age to access will never give you a prompt object now. 147 00:26:58.170 --> 00:26:59.490 Alberto Escalante Del Valle: This one yeah. 148 00:26:59.670 --> 00:27:02.280 Suchita Kulkarni: For example, so here, you can have. 149 00:27:03.810 --> 00:27:08.040 Suchita Kulkarni: The w that decrease to a general audience either deca switching. 150 00:27:09.060 --> 00:27:12.720 Suchita Kulkarni: To a channel a channel production is going to be very surprised by you. 151 00:27:14.070 --> 00:27:15.450 Alberto Escalante Del Valle: know you have to have a creative model. 152 00:27:16.320 --> 00:27:27.720 Alberto Escalante Del Valle: Maybe I was not clear enough say forget about they can just think about the final state so here, you could have a problem leptin from the w decay and then some displays objects. 153 00:27:28.860 --> 00:27:45.780 Alberto Escalante Del Valle: From a red cheeks decay so effectively, you have from leptin displays vertex so it's a different model, it leads to a similar state that one can run this thing out efficiency on the same analysis and see what would be the sensitivity. 154 00:27:46.200 --> 00:27:55.890 Suchita Kulkarni: Yes, but I would still naive, we expect this to be worse because, for two reasons, one is because this is only applicable to. 155 00:27:58.410 --> 00:28:01.050 Suchita Kulkarni: Left or left on neutrino final state you can't do it for. 156 00:28:02.190 --> 00:28:08.880 Suchita Kulkarni: You will probably it will be worse for lj final stage, just because you have a three body versus to body kinematics. 157 00:28:10.770 --> 00:28:14.280 Alberto Escalante Del Valle: I think you mean better or worse, with respect to what. 158 00:28:14.430 --> 00:28:22.320 Suchita Kulkarni: He, but he has dedicated would still be that's my claim now you're speaking just because you have a kinematic differences. 159 00:28:24.600 --> 00:28:26.310 Alberto Escalante Del Valle: So, say, think of the search. 160 00:28:26.670 --> 00:28:40.080 Alberto Escalante Del Valle: So then men men i'm going to change the argument, maybe I can convince you this way, so we have done searches for prompt die leptons a look for lps coming from the higgs and we see that we have good sensitivity. 161 00:28:41.190 --> 00:28:55.290 Alberto Escalante Del Valle: Now you agree with me that this production mechanism it doesn't depend on on the see boson, so this is just a handle two, three, so it plays to see by a w and then do the same logic, with just one problem leptons to that. 162 00:28:56.520 --> 00:28:59.040 Alberto Escalante Del Valle: And then you end up with. 163 00:29:00.480 --> 00:29:08.220 Alberto Escalante Del Valle: What you end up with a different search, because you have remove one of the prom leptons but you, you have sensitivity to us this this this very same model. 164 00:29:08.520 --> 00:29:16.830 Suchita Kulkarni: Yes, what what what i'm not even trying to think about is your html DK in a genuine hmm search is a three body DK. 165 00:29:18.090 --> 00:29:23.940 Suchita Kulkarni: Each to XX DK in a genuine H two X X is a political that's what i'm thinking about. 166 00:29:24.180 --> 00:29:27.480 Alberto Escalante Del Valle: I think when we need to see if the out of the box search. 167 00:29:27.510 --> 00:29:29.700 Alberto Escalante Del Valle: One has to change the requirements and the number of. 168 00:29:29.700 --> 00:29:41.190 Alberto Escalante Del Valle: Attacks these it goes into the details, what the hicks is decaying to that, I agree that one would need to do the check but conceptually you know it's still a pound laptop with a display of. 169 00:29:41.490 --> 00:29:45.510 Suchita Kulkarni: This, I agree with you, but there's there's two verses three body DK that's a bit. 170 00:29:45.720 --> 00:29:46.050 yeah. 171 00:29:47.100 --> 00:30:01.500 Alberto Escalante Del Valle: I think I understand your point, I think this needs to be checked, I think the the whole point when I added this is that you know tagging the prompt from the w decay and look for an empty object, on the other side, without having to worry about. 172 00:30:02.670 --> 00:30:02.940 You know. 173 00:30:04.950 --> 00:30:05.850 Alberto Escalante Del Valle: Replacing this eat. 174 00:30:07.230 --> 00:30:08.250 Suchita Kulkarni: This yes, I. 175 00:30:09.300 --> 00:30:11.370 Suchita Kulkarni: Can I can I ask another question. 176 00:30:11.430 --> 00:30:12.390 José Zurita: Yes, sir. 177 00:30:14.670 --> 00:30:15.030 Suchita Kulkarni: Thank you. 178 00:30:17.400 --> 00:30:23.160 Suchita Kulkarni: very nice, I noticed something very nice, which is the the region where. 179 00:30:24.270 --> 00:30:30.210 Suchita Kulkarni: For example, cms doesn't seems to be not someone doesn't look at. 180 00:30:31.710 --> 00:30:37.890 Suchita Kulkarni: time you and resonances between yeah exactly Point seven 2.9 or something like that, but I class does. 181 00:30:38.820 --> 00:30:49.530 Suchita Kulkarni: mm hmm do you know why the two or three different experiments of blind to different regions of parameters space, even if they're looking for very similar things at the end. 182 00:30:49.950 --> 00:30:52.440 Alberto Escalante Del Valle: Well, let me just comment on that last. 183 00:30:52.920 --> 00:30:55.560 Alberto Escalante Del Valle: I think this could be that the batteries are very different so. 184 00:30:55.710 --> 00:31:06.960 Alberto Escalante Del Valle: The search is done relying on the age of over he, for example, for the search for joining piquet's or electrons and it's not using information for the tracker. 185 00:31:07.620 --> 00:31:21.000 Alberto Escalante Del Valle: Well, in this case you have you no problem, the case in the tracker from standard model resonances of these masters so by using other detector you have different backgrounds, so I can imagine that, unless I not. 186 00:31:22.710 --> 00:31:32.520 Alberto Escalante Del Valle: tagging using tracking information can can be concerted for all these masters, but maybe if there is an analyzer from others can see you probably can do this. 187 00:31:36.090 --> 00:31:39.720 Suchita Kulkarni: I put it differently, probably cms can cover that changes the. 188 00:31:40.380 --> 00:31:46.680 Alberto Escalante Del Valle: strategy, a little I think in cms if you would not lie on the packing certainly you could make this narrow it. 189 00:31:47.700 --> 00:32:00.690 Margaret Lutz: Thanks and he can say that an atlas sometimes we tend to split searches a bit more, and maybe then cms where we have like more of a distinct prompt on deck search and more of a distinct displaced objects search. 190 00:32:01.800 --> 00:32:18.120 Margaret Lutz: So we do have a group that's doing like a prompt object oriented search that's similar to the one that you have share whether using no detector type objects, whereas this one didn't so that may also the counter someone. 191 00:32:24.210 --> 00:32:29.520 José Zurita: So if these are the, this is the status comment, I think we can try to go to Juliet. 192 00:32:29.580 --> 00:32:32.280 José Zurita: Yes, thank you, thank you very much. 193 00:32:33.360 --> 00:32:36.840 Juliette Alimena: it's just a curiosity, so if we're running behind we can skip me. 194 00:32:37.860 --> 00:32:38.790 José Zurita: Know okay okay. 195 00:32:39.480 --> 00:32:46.800 Juliette Alimena: Okay, it really fast and thanks for the talk Alberto on slide 35 I was just curious you mentioned. 196 00:32:47.820 --> 00:32:59.550 Juliette Alimena: Extending to non isolated displace leptons for these these searches without the the common vertex I feel my my thought is that this would be hard. 197 00:33:00.060 --> 00:33:05.670 Juliette Alimena: Because we sort of rely on the the isolation to be down the backgrounds, on the other hand, if you wanted to. 198 00:33:06.090 --> 00:33:17.940 Juliette Alimena: design a search where you're okay with with more backgrounds, rather than trying to get them as small as possible and see how you can do, maybe, maybe then that works, but maybe you had other ideas of. 199 00:33:19.080 --> 00:33:21.030 Juliette Alimena: Guinea telling me more about this this thought. 200 00:33:22.140 --> 00:33:22.680 well. 201 00:33:23.970 --> 00:33:27.780 Alberto Escalante Del Valle: This is, I fully agree, I mean that certainly the backers would blow up. 202 00:33:28.200 --> 00:33:39.240 Alberto Escalante Del Valle: But certainly one would have to put tighter requirements from displacement on the tip of the leptons such that you start to cut away the backlinks from some of the processes when you find a regime. 203 00:33:39.660 --> 00:33:49.470 Alberto Escalante Del Valle: One has some sensitivity with signals with non isolated labs and I can tell you what displacement, it would be what PT requirements, you would need. 204 00:33:50.190 --> 00:33:59.490 Alberto Escalante Del Valle: But this is something that could be explored, because these things haven't been tried and thinking of new areas of the face basement, this is one of them. 205 00:34:01.200 --> 00:34:03.390 Juliette Alimena: yeah I think you've got an excellent point thanks. 206 00:34:06.000 --> 00:34:09.780 Alberto Escalante Del Valle: But I fully agree that, for these analysis during mood isolation, then you're dead. 207 00:34:15.300 --> 00:34:19.830 José Zurita: So I think want to accelerate my powers of asking you about slide 20. 208 00:34:21.840 --> 00:34:42.210 José Zurita: Because it's something that caught my eye in the caption so euro that this is a scale of search to the the bar is quite a specific DVD so i'm tempted to interpret it as you as the probably see on the same footing, or something particularly that makes it dvr i'm. 209 00:34:42.750 --> 00:34:44.370 José Zurita: just going to show up my mind. 210 00:34:45.480 --> 00:34:49.680 Alberto Escalante Del Valle: I think you're right maybe I was I didn't think about it, so the search. 211 00:34:50.550 --> 00:35:05.880 Alberto Escalante Del Valle: It has said so, it provides result for different flavors So if you go to the paper, you will see the bar, you will see the device, and you will see hedonic House in a similar manner so bench five with hundred percent that you can play around and do the meeting as you want so. 212 00:35:07.440 --> 00:35:11.730 Alberto Escalante Del Valle: It is not that this is a model that favors like iTunes or anything like that. 213 00:35:12.900 --> 00:35:13.860 José Zurita: Okay, thank you. 214 00:35:17.130 --> 00:35:18.120 José Zurita: Okay, so. 215 00:35:19.170 --> 00:35:21.510 José Zurita: Shall we move on to the next speaker. 216 00:35:21.570 --> 00:35:23.250 José Zurita: Thank you for that was a very nice. 217 00:35:24.900 --> 00:35:26.100 Nishita Desai: Yes, so. 218 00:35:26.160 --> 00:35:31.140 Alberto Escalante Del Valle: I said, are you around we don't See you in zoom so just confirming. 219 00:35:34.620 --> 00:35:43.980 Okay, it doesn't seem like our next speaker is here yet so maybe we can move on to charge anyone you want, are you around, and you can see. 220 00:35:45.270 --> 00:35:48.240 Chaochen Yuan: Hello hello, can you hear me, yes, yes. 221 00:35:50.910 --> 00:35:52.380 Chaochen Yuan: Okay, let me share my slides. 222 00:36:08.190 --> 00:36:10.260 Chaochen Yuan: Can everyone see the shirt okay. 223 00:36:12.300 --> 00:36:24.960 Chaochen Yuan: Hello everyone glad to have this opportunity to present our new social strategy for the lonely with particle which is producing and detecting the lonely with particles at two different experiments at RC. 224 00:36:25.470 --> 00:36:33.930 Chaochen Yuan: And here's the link for this paper if you're interested, you can search for more details Okay, so this is an offline but today. 225 00:36:34.530 --> 00:36:44.130 Chaochen Yuan: First, is a very brief overview for nollywood particles and as a lever come to the surgery surgery, and after that they will be the even selection background and a trigger. 226 00:36:45.090 --> 00:36:54.780 Chaochen Yuan: And finally experiment expected limit and and with the summary Okay, so this is a very brief overview for longer particles because. 227 00:36:56.040 --> 00:37:04.350 Chaochen Yuan: For this part is already well presented by the previous over view presentation and so. 228 00:37:05.460 --> 00:37:09.210 Chaochen Yuan: Ever just a very quick so longer particles generated. 229 00:37:10.470 --> 00:37:15.690 Chaochen Yuan: So existed in standard model and are many extension of the standard model like sushi hidden sector. 230 00:37:16.380 --> 00:37:30.180 Chaochen Yuan: And there are four reasons for particles that can be long lived we set up with that pie, for example, there are small copying constant small massive leading to decay product large media mediator mess and the. 231 00:37:31.440 --> 00:37:38.430 Chaochen Yuan: Last desperation discovery of bsm lonelier particle indicate new hierarchy or old hierarchy see new places. 232 00:37:39.270 --> 00:37:56.850 Chaochen Yuan: Okay, so this is the model that we are interested in that is the hidden valley model it's kind of it's belong to the duck sector so for the doctor is still remains largely unknown and in the red party so conceptual diagram for the hidden value model. 233 00:37:57.990 --> 00:38:13.080 Chaochen Yuan: Okay, so in the Left part is the physics process that we are interested in, which is the shower and having positioning the hidden sector distribute energy to manage soft hidden valley muscles and the muscles became to me was. 234 00:38:14.100 --> 00:38:27.420 Chaochen Yuan: In the red part is the energy distribution for the for this process here reset the plan mice to 200 gv Hello family medicine, the mass for hidden valley medicine equals to zero, plus three gv and. 235 00:38:28.470 --> 00:38:34.860 Chaochen Yuan: The expected or average Lee environment there will be 48 million muscles. 236 00:38:36.330 --> 00:38:47.640 Chaochen Yuan: OK, so now it's searching strategy so currently the surgery strategy roughly four into two categories first is new search or trigger strategies and another one is adding new models. 237 00:38:49.410 --> 00:39:06.420 Chaochen Yuan: And we come up with a new searching we proposed a new social strategy which is using existing philosophies as far detector to produce colonial particle at one experiment and the detect the loner particle at another experiment so in the red part. 238 00:39:07.680 --> 00:39:22.830 Chaochen Yuan: Is the other possible combinations here and the combination of to use the our city and Elliot to produce the longer particle and use our class texture to detect it only longer particle has them small distance. 239 00:39:24.990 --> 00:39:43.320 Chaochen Yuan: And the zoom So what are we looking for, so we based on that film and diagram we focus on the meal on channel, there are two reasons we choose this meal on channel because, first, is the mian can travel along in the Left plot, you can see, this is the STOP loss for me on propagate in there. 240 00:39:44.340 --> 00:39:51.180 Chaochen Yuan: And for the red part is the murals direction barely changed during the propagation. 241 00:39:53.430 --> 00:40:02.640 Chaochen Yuan: Okay, and so, because of this, the ideal combination would be use our CB or at least to produce the longer particle and use our class to detect. 242 00:40:03.240 --> 00:40:10.530 Chaochen Yuan: So there are three advantages for our class detector one is just combination has the smallest distance and. 243 00:40:11.340 --> 00:40:28.260 Chaochen Yuan: oculus is not directly on the forward direction of our Serbian Alice but very close to the forward direction of rcp and Alice and the third reason is a class has a very large volume of it as a volume of the general philosophy is pretty large. 244 00:40:29.490 --> 00:40:39.480 Chaochen Yuan: about the illuminati so for him not to run me suppose our CBS 10 times lower than the lunacy of our CBS 10 times lower than us. 245 00:40:40.740 --> 00:40:47.400 Chaochen Yuan: And for Alex with the we're not sure so come by our city and Alice we assume 500 investment of our. 246 00:40:49.350 --> 00:40:57.240 Chaochen Yuan: Okay, so now is the events selection, so there are few things that we can use to select our signal. 247 00:40:57.690 --> 00:41:11.880 Chaochen Yuan: The for indirect in the Left plot, this is the Center distribution of income, he was in the coordinates of our class director detector from this product, we can see that the murals from longer particle decay have a preferred indicate angle. 248 00:41:13.200 --> 00:41:20.790 Chaochen Yuan: And we also will requires a PT the PT of the mural ladders on Wednesday between ensure my opponents in the middle chamber. 249 00:41:21.570 --> 00:41:34.650 Chaochen Yuan: and also the timing information can also be useful for this, the time is time is going to reverse the two that have a mural from atlas collegian and also. 250 00:41:35.550 --> 00:41:48.360 Chaochen Yuan: Most of the murals will have large display will have large displacement or them larger impact parameter, and there are also some other even selection, we can apply in the offline. 251 00:41:49.860 --> 00:41:58.080 Chaochen Yuan: and offline person okay so after the signal via talk, maybe we'll talk about the background see I feel potential background. 252 00:41:58.950 --> 00:42:08.040 Chaochen Yuan: Of feel potential sources of the background First is the cosmic renew on, but the cosmic room you want can be removed, using the directional information so if you see. 253 00:42:08.880 --> 00:42:19.590 Chaochen Yuan: If the cosmic room you all want to hate that last detector in harassing direction it needs to passing through 336 kilometers of rocks. 254 00:42:21.210 --> 00:42:25.950 Chaochen Yuan: So if you require very, very high energy and another. 255 00:42:27.330 --> 00:42:40.410 Chaochen Yuan: background is from the radiative environment, so this can be removed by requiring them to on PT larger than one TV and there are also some possible high energy music directly from http or Alice. 256 00:42:41.490 --> 00:42:54.210 Chaochen Yuan: So for this we estimate it the expected number of this process and the expected number of humans is around 0.01 and this order based on 500 embarrassment of our. 257 00:42:54.990 --> 00:43:11.040 Chaochen Yuan: And if you want to know the haha we asked me this, you can see the backup and therefore neutrino commercials also we assumed will be estimate is that process this process and expected number of events is also at thereupon 01 order. 258 00:43:12.360 --> 00:43:21.360 Chaochen Yuan: Based on 500 embarrassment about okay so and also there will be some background from atlas collegian self so first days. 259 00:43:22.500 --> 00:43:32.580 Chaochen Yuan: Oh, we can requires it to the point in the incoming we aren't pointing back to the production site, like our CP and Alice and mostly. 260 00:43:34.140 --> 00:43:51.030 Chaochen Yuan: Most of me or from atlas collegian you have small impact parameter, and also the timing information can be helpful, like in out in track versus the inside out track so basically this strategy is background free. 261 00:43:54.810 --> 00:43:55.350 Chaochen Yuan: Okay, so. 262 00:43:56.490 --> 00:44:14.730 Chaochen Yuan: Effective to track this to attract the signal is not a commercial us searching strategy, and it will also require some update on the trigger so in the top floor in the top part that to plot come from the oculus new smallville Dr. 263 00:44:16.080 --> 00:44:20.850 Chaochen Yuan: In the red in the Left plot here is how atlas detector. 264 00:44:21.930 --> 00:44:28.020 Chaochen Yuan: So this is how it detector to distinguish the signal resistor background. 265 00:44:29.100 --> 00:44:36.600 Chaochen Yuan: So they have a parameter named appointing angle and in the red plot, you can see that. 266 00:44:38.280 --> 00:44:45.660 Chaochen Yuan: Based on the cut for the pointy angle, you can remove you can keep most of the signal and the rejected most of the background. 267 00:44:46.860 --> 00:45:02.400 Chaochen Yuan: So we found that this strategy can be large bird can be large bird by our purposes, the first is we defined a different point the angle one as the angle of the settlement with respective to an event momentum track. 268 00:45:03.450 --> 00:45:10.920 Chaochen Yuan: You know another word align from interaction point of atlas detector to the settlements radius position in the new smallville. 269 00:45:12.030 --> 00:45:25.050 Chaochen Yuan: You can also see the top law to the data Center is basically the appointing Angola and soon we can define a similar point the angle, that is, the angle of the segments in the big wheel. 270 00:45:25.830 --> 00:45:36.690 Chaochen Yuan: With respective to an event momentum track another another word is a line from the interaction point of our savior Alice so by requiring that the point the angle to. 271 00:45:37.890 --> 00:45:50.910 Chaochen Yuan: Around zero and aponte and mango point the angle one large and they were pointing to fine, we can keep our signal and the reject most of most of the background from atlas collision OK, so now is the expected limit. 272 00:45:52.500 --> 00:46:11.250 Chaochen Yuan: So you can see, the Left plot is the expected expected limit for our search strategy and for this plots one P amp G vpc Carter was applied and the in the in the red plot is another ace from this paper and this plot shows. 273 00:46:12.360 --> 00:46:25.260 Chaochen Yuan: The some social strategy based on atlas Ms and rcp itself, so you mean purposes for this product is to show that we have different left we have different. 274 00:46:26.580 --> 00:46:30.330 Chaochen Yuan: lifetime range for the for the spreadsheet you can see. 275 00:46:32.940 --> 00:46:41.310 Chaochen Yuan: Okay, so how is the summary so we're proposing a new loan do particle searching strategy of his background free and a very low cost of we don't need to build new models. 276 00:46:41.820 --> 00:47:00.480 Chaochen Yuan: models and the vehicle sensitive to large left hand range and also this certain strategy can serve as an empty pendant cross check for that long left hand of scenario, and we are also trying to implement implement this to use them as detector to detect the longer particles. 277 00:47:02.400 --> 00:47:04.320 Chaochen Yuan: Okay that's all from my side, thank you. 278 00:47:06.060 --> 00:47:12.840 Very much that's certainly an interesting idea, but we have questions from the audience. 279 00:47:15.750 --> 00:47:20.100 or comments about feasibility from any of the experiment let's burn. 280 00:47:26.430 --> 00:47:29.190 José Zurita: So I i'm sorry I just raise your hand. 281 00:47:31.050 --> 00:47:39.780 José Zurita: So I did they only thing that could be confusing because essentially you're saying I produce a particular class and I look for it in cms right. 282 00:47:40.650 --> 00:47:41.730 Chaochen Yuan: Yes, if you want to. 283 00:47:41.730 --> 00:47:49.380 José Zurita: settle a, the only thing i'm not sure that i'm probably people from either experiment can say if if something let's say. 284 00:47:49.800 --> 00:47:56.040 José Zurita: Non government happen, and they see the signal, maybe they block it, because it seems that something is malfunctioning. 285 00:47:56.640 --> 00:48:10.830 José Zurita: that that is something I don't know if you look into if there's a way that, for instance, section for the cosmic rays or any kind of Father field that would essentially meteor signal, this is something that honestly I either know that's a concern or not. 286 00:48:12.030 --> 00:48:12.810 Chaochen Yuan: Yes. 287 00:48:12.840 --> 00:48:27.900 Chaochen Yuan: If we based on the current the trigger strategy and things that will probably happen, but so, which means we need to update some, we need to update the trigger strategy, maybe have some new trigger algorithm for this if we want to use them as detector. 288 00:48:28.380 --> 00:48:39.930 José Zurita: yeah I mean I obviously not trigger is a problem, but i'm saying, if you would pass an existing trigger wouldn't you be killed by a sort of first round of pre selection of filters. 289 00:48:40.560 --> 00:48:54.330 José Zurita: Because your particle looks like the cosmic Ray or look like some of the detectors is malfunctioning at the moment, and then they just thrown away this is, this is my concern, but should, I mean maybe trigger it was a problem I I. 290 00:48:55.200 --> 00:49:05.880 Chaochen Yuan: For cosmic rays, mostly from up to bottom, but we will help we can help or lack of direction cut we only accept as a particle come from the production point. 291 00:49:06.360 --> 00:49:20.730 Chaochen Yuan: Of this laundry particle vitreous the maybe the outlaws detector or sippy detector we have a preferred indicates angle, I think that can help us to reject most of the cosmic renewal, because it comes from the horizon direction. 292 00:49:22.830 --> 00:49:23.580 José Zurita: Okay, good. 293 00:49:24.240 --> 00:49:24.690 Chaochen Yuan: Yes, thank you. 294 00:49:29.130 --> 00:49:35.910 Matt Strassler: yeah, I think, in the end I didn't quite understand what you're envisioning as the actual procedure. 295 00:49:36.930 --> 00:49:52.020 Matt Strassler: Can can you go back to your plot where you showed some limits yeah so so you're imagining here that you detect three simultaneous milan's or something like that, from the direction of I like CB and that's the signal you're looking for. 296 00:49:52.170 --> 00:50:04.140 Chaochen Yuan: This good job, yes, so we can help like a renewal signal from adversity direction from outside, to the inside and based on the previous analysis that. 297 00:50:05.160 --> 00:50:09.210 Chaochen Yuan: Theoretically, they won't have this such signal. 298 00:50:10.260 --> 00:50:13.410 Chaochen Yuan: If based on other background process. 299 00:50:14.130 --> 00:50:17.820 Matt Strassler: Well Okay, I mean you, you you, you made various arguments about what you're. 300 00:50:19.410 --> 00:50:27.630 Matt Strassler: That there wouldn't be any backgrounds and various arguments about what kind of triggering you would you might need and so forth, but you didn't at any point say that you know you're looking for. 301 00:50:28.320 --> 00:50:33.600 Matt Strassler: New into the arrive simultaneously and if that's what you're looking for well that's that's going to be background free just by that. 302 00:50:34.230 --> 00:50:40.260 Matt Strassler: But yes, so it seems to me that's probably more important, but then, how did you. 303 00:50:42.000 --> 00:50:44.730 Matt Strassler: So, so how did you. 304 00:50:45.960 --> 00:50:54.300 Matt Strassler: mean that seems to me that that the the rates are going to be enormously model dependent so i'm just curious how you actually did the estimates for for what the rates would be showing. 305 00:50:55.440 --> 00:50:55.680 Matt Strassler: You know. 306 00:50:55.710 --> 00:50:57.120 Chaochen Yuan: For this plot. 307 00:50:58.050 --> 00:50:58.410 Chaochen Yuan: yeah. 308 00:50:58.680 --> 00:51:00.120 Matt Strassler: Okay, so please how you did it. 309 00:51:00.690 --> 00:51:09.270 Chaochen Yuan: yeah okay so he's basically based on the Monte Carlo simulation and we generate the search process by PCs and we simulate the. 310 00:51:10.410 --> 00:51:16.050 Chaochen Yuan: The propagation process for me on propagating the universe by music. 311 00:51:17.070 --> 00:51:18.360 Chaochen Yuan: Software that. 312 00:51:19.950 --> 00:51:28.140 Chaochen Yuan: To do the simulation and We calculated the how many meals can reach the same as can reach the detector. 313 00:51:29.850 --> 00:51:31.800 Chaochen Yuan: And then we'll get our acceptance. 314 00:51:33.180 --> 00:51:33.420 Chaochen Yuan: and 315 00:51:33.630 --> 00:51:34.830 Chaochen Yuan: This okay. 316 00:51:35.190 --> 00:51:42.390 Matt Strassler: Yes, so so for so, for example, you were taking some sort of dark shower model, what kind of signal acceptance, did you actually have. 317 00:51:44.610 --> 00:51:52.650 Chaochen Yuan: um so for the signal we have okay so for the signal we have is the so we have a light. 318 00:51:54.090 --> 00:52:11.340 Chaochen Yuan: feels lectures for our signal first day see come from that angle, the point and go back to so he's come from a certain angle angle range and the new on pto laggards and when gv. 319 00:52:12.360 --> 00:52:18.750 Chaochen Yuan: And so you can pass the music simulation that having enough energy to hate the. 320 00:52:19.830 --> 00:52:21.540 Chaochen Yuan: The detector detector. 321 00:52:24.150 --> 00:52:33.210 Matt Strassler: But in the end, are you are you getting like 10 to the minus four types of time is eight what what what kind of rates do you need in order to be able to get a few events. 322 00:52:33.870 --> 00:52:38.580 Chaochen Yuan: i'm home, then you will start to continue to ask I reach the detector detector. 323 00:52:43.260 --> 00:52:44.520 Chaochen Yuan: So I think that's what we need. 324 00:52:47.820 --> 00:52:48.270 Huaqiao Zhang: to sign. 325 00:52:48.990 --> 00:52:56.610 Nishita Desai: yeah, I think, maybe it's better to talk about numbers offline is people don't remember my question. 326 00:52:57.000 --> 00:53:02.970 Michael Albrow: yeah just commenting so it seems cms to atlas because they're like nine kilometers eight nine kilometers apart. 327 00:53:04.170 --> 00:53:07.140 Michael Albrow: Really solid angle that counts in the central region. 328 00:53:08.400 --> 00:53:17.790 Michael Albrow: Whereas llc beach atlas because the other way around, also at us as fire luminosity so detecting things and actually be more interesting but there. 329 00:53:20.220 --> 00:53:28.890 Michael Albrow: yeah I mean i'm wondering about background from all around the ring there have been HALO and interactions on the beam fight okay producing. 330 00:53:29.460 --> 00:53:41.190 Michael Albrow: Forward particles is fixed target, of course, but still you're going to get a lot of background, I think, from around the ring from for your arms into as Have you considered that background. 331 00:53:43.710 --> 00:53:47.040 Chaochen Yuan: First, for this background, I think we have. 332 00:53:50.100 --> 00:54:09.510 Chaochen Yuan: So I think so that's a problem that is atlas is not directly in the forward direction of our CB few CDs plot is also a conceptual problem but it's close but not directly on the rcp are on the rcp forward direction, and for that background. 333 00:54:10.740 --> 00:54:16.560 Chaochen Yuan: We didn't estimate very carefully but expected number of events will be small. 334 00:54:18.000 --> 00:54:18.780 Chaochen Yuan: smaller than one. 335 00:54:20.190 --> 00:54:26.550 Michael Albrow: was smaller than one okay in the inverse asked about okay all right, I mean. 336 00:54:28.020 --> 00:54:31.770 Michael Albrow: It is it's I think it's gonna be an issue because you do, you do have a lot of interactions. 337 00:54:32.700 --> 00:54:37.260 Chaochen Yuan: yeah we can all have some very more careful estimation, for this. 338 00:54:37.560 --> 00:54:38.910 Michael Albrow: yeah I think when we check Thank you. 339 00:54:39.450 --> 00:54:39.870 Chaochen Yuan: Thank you. 340 00:54:45.090 --> 00:54:57.660 Huaqiao Zhang: Thank you, I don't see any more hands, maybe I can just a complement to the the beanbag currencies, so the direction of rsvp to athletes are so. 341 00:54:59.250 --> 00:55:01.770 Huaqiao Zhang: it's in the and the coverage it's not in the. 342 00:55:02.790 --> 00:55:07.410 Huaqiao Zhang: close to the beam beam time so that should not be an issue. 343 00:55:09.570 --> 00:55:15.090 Huaqiao Zhang: We serve a tie or eight right So you see in the cupboard region. 344 00:55:18.090 --> 00:55:19.530 Michael Albrow: What i'm also thinking about. 345 00:55:20.310 --> 00:55:27.930 Michael Albrow: interactions that are only you know hundreds of meters upstream of an http if you're using it, or as a catalyst. 346 00:55:29.580 --> 00:55:30.120 Michael Albrow: Anyway, okay. 347 00:55:31.230 --> 00:55:31.740 Michael Albrow: it's point. 348 00:55:37.140 --> 00:55:37.440 Right. 349 00:55:38.820 --> 00:55:40.740 Is it, are you there yet. 350 00:55:43.800 --> 00:55:48.990 Chaochen Yuan: Okay, so we seem to have somehow lost the final speaker of the session 351 00:55:50.610 --> 00:55:57.000 José Zurita: So, shall we just close for today who say yes, I think this is a good idea, so I want to thank. 352 00:55:58.110 --> 00:56:11.280 José Zurita: All the people that are remaining leanne today, and I hope to see most of you, if not all, tomorrow, yes, I will buy more morning afternoon, whatever suits your time bye bye bye I. 353 00:56:11.910 --> 00:56:14.580 Juliette Alimena: think we started at 2pm tomorrow, so I wanted. 354 00:56:14.820 --> 00:56:15.840 James Beacham (he/him): To be in certain. 355 00:56:16.860 --> 00:56:17.520 James Beacham (he/him): Job everybody. 356 00:56:18.030 --> 00:56:18.420 José Zurita: bye bye. 357 00:56:18.870 --> 00:56:19.350 bye bye.