WEBVTT 00:00:00.000 --> 00:00:00.000 So we will start with Alberto and invite the talk show in our address CMS and initially complement each other, and then we're going to have later to individual contributions from what is the backbone of our community which on this beautiful conservative 00:00:00.000 --> 00:00:03.000 talks will follow. So without further ado, please get ready to start the record first, second, oh sorry. Yeah. 00:00:03.000 --> 00:00:05.000 Thank you very much. 00:00:05.000 --> 00:00:07.000 Now you can start. 00:00:07.000 --> 00:00:18.000 Right. Good. Hello everybody. This is going to be a talk about God's overlaps and complementarity in recent searches. 00:00:18.000 --> 00:00:23.000 So before I started, let me just trust someone I think is typing. 00:00:23.000 --> 00:00:27.000 Someone I think is typing. 00:00:27.000 --> 00:00:35.000 Okay, perfect. So this talk will focus on my view on the topic, focusing on recent results ideology. 00:00:35.000 --> 00:00:47.000 And before starting I wanted to mention that they find the expanded expanding our research program, impressive and full of creativity and brilliant ideas. 00:00:47.000 --> 00:00:59.000 We have seen a boost in the past years in a number of very quick searches and he knows searches, and more recently. Recently, there are plenty of new results in direct searches for Berlin piece. 00:00:59.000 --> 00:01:07.000 At the same time while preparing the talk. I tried to address what can we do better. And if there is some room for truth. 00:01:07.000 --> 00:01:17.000 So let's get started. Let's start with HNLEF put the references to the searches that they've used to prepared to talk. 00:01:17.000 --> 00:01:22.000 And, and let's get started so he knows. 00:01:22.000 --> 00:01:39.000 They're very searches for other piece targeting agents and they're all looking for he knows producing in WD kids and this has the advantage that you have a chrome leapt on to this used for triggering their searches from Atlas CMS and le TV. 00:01:39.000 --> 00:01:54.000 You're, you're all looking at the, the casing the tracker in various final states. So, between Atlas and CMS, essentially you cover all types of displays leptons analogy be looking at some electronic the case. 00:01:54.000 --> 00:02:05.000 Now the obvious ways of extending these is to look at all the production mechanisms for example kn the case for heavy flavor decays or even some bsm objects. 00:02:05.000 --> 00:02:10.000 Now the key thing is that you didn't have, then the problem for triggering. 00:02:10.000 --> 00:02:23.000 And then you can look at other HNLDK modes, for example, are joining the case of virtual W's receives, or even final states involved in 100 times. 00:02:23.000 --> 00:02:37.000 But let's get back to the results. And here, here hand drawn a comparison between Atlas CMS ality and Belfi for the mixing with the electron and the meeting with me or as a function of the HTML mass. 00:02:37.000 --> 00:02:50.000 And here what you see for example if you go to the high lifetime to smaller mixing above to gv adolescence CMS have pretty much comparable sensitivity was CMS has better sensitivity for prom like. 00:02:50.000 --> 00:02:54.000 And this is because the searches goes to a smaller displacement. 00:02:54.000 --> 00:03:11.000 Now, le CB, you see here, starts at five dv, and typically covers the region with more prompt, like h&s, and in fact, you see here comparison with a CMS prom search that covers similar face space. 00:03:11.000 --> 00:03:22.000 Now, in terms of possible expansions, when can think of scanning different mixing angles in protect particularly the mixing with the town, this is something that is this let's explore less constrained. 00:03:22.000 --> 00:03:34.000 And one can connect with more realistic scenarios for example with looking at what's allowed from neutrinos elation, and this is something that was done in the latest result from from Atlas found these pretty nice. 00:03:34.000 --> 00:03:37.000 When can also go to the bottom left diagonal. 00:03:37.000 --> 00:03:53.000 This is smaller Maxi smaller masses and longer lifetimes and hear what you have is the case, beyond the tracker. 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 00:03:53.000 --> 00:03:56.000 he knows producing MBD case. 00:03:56.000 --> 00:04:03.000 And then lastly you have he knows beyond the detector and these can be searched in the missing mass distribution. 00:04:03.000 --> 00:04:18.000 Finally, these searches look at HMS, but if you look at the final state, you can have similar objects, for example, if you look at associated production of the Higgs boson with promotions, and you will seem to talk that there are many searches for Hicks 00:04:18.000 --> 00:04:31.000 for the case. So I think these searches have good sensitivity but so far there is not an interpretation, just be on the channel so I think this is something that that will be interested to, to see in the future. 00:04:31.000 --> 00:04:39.000 To this connects with the next topic, we're going to talk about Hicks ready case and we're going to focus first on hedonic final states. 00:04:39.000 --> 00:04:44.000 Here the short this life lifetimes and talking about the case in the tracker. 00:04:44.000 --> 00:04:53.000 There are searches looking at the associated production but they just described. So right here is the case and then then prompt left us from the from from the sea. 00:04:53.000 --> 00:04:59.000 And here we have results in terms of the signal rate as a function of the lifetime, or Atlas and CMS. 00:04:59.000 --> 00:05:11.000 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, early to be better than than the same as one. 00:05:11.000 --> 00:05:23.000 Now when you look at higher masters and higher lifetimes here want to highlight the 55 GV hypotheses, and CMS is stronger than an Atlas. 00:05:23.000 --> 00:05:39.000 Now, I'm going to stick to the same i 55 GV, and now I'm going to compare with a more inclusive search targeting glue and glue fusion. Here the advantages that you didn't have, they didn't pay the penalty in signal rate, coming from the associated production. 00:05:39.000 --> 00:05:46.000 And you can see that this is sufficient to be the result of this city production at high masses. 00:05:46.000 --> 00:05:51.000 Here there are no equivalent interpretation from Atlas so will not discuss this. 00:05:51.000 --> 00:06:06.000 And I finished just by saying that I think for the associated production one can, you know, focus on much lower masses profiting from the prompt dialect and triggers and targeting the most challenging signatures, say hydrating tabs for example, and also 00:06:06.000 --> 00:06:15.000 that there are no associated production searches beyond the laptop so one can think of WZVA for a Tiki Bar. 00:06:15.000 --> 00:06:21.000 Now, at higher masses are googling fees and there is also search from from LED. 00:06:21.000 --> 00:06:26.000 You can see the constraints of research or weaker to the one from CMS. 00:06:26.000 --> 00:06:35.000 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. 00:06:35.000 --> 00:06:46.000 Sorry from familia TV. And I think that there's room for improvement, especially at the lowest masses, you see here, 25 DV. These already at the branching ratio larger than unity. 00:06:46.000 --> 00:06:51.000 So I think this is also something to look to see for updates in the future. 00:06:51.000 --> 00:06:54.000 Now, I'm going to hire lifetimes. 00:06:54.000 --> 00:07:08.000 Now you see here this new search is coming up here in blue, and all these cluster of searches that typically meet their lifetime. And these are searches in the age color in immune system, and they pretty much expand the, the Ctr coverage. 00:07:08.000 --> 00:07:24.000 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 low mass will be searches with tracker lifetimes by going to the targeting the most challenging scenarios, 00:07:24.000 --> 00:07:35.000 as I said before had joining powers compressed and boosted, and here for global future searches one has to go to dedicated triggers and machine learning. 00:07:35.000 --> 00:07:45.000 But let's now switch to the highest lifetime so these are searches as I mentioned in the immune system. And here, it's interesting that Atlas and CMS have three different strategies. 00:07:45.000 --> 00:07:55.000 So, unless he's looking for his place for this is an immune system while CMS is looking for 100 shower in immune system. 00:07:55.000 --> 00:07:59.000 Now one key difference is the trigger that is us. 00:07:59.000 --> 00:08:09.000 Atlas has a dedicated triggering immune system. While CMS is relying on the vicinity. For those not familiar, this is based on calorie meeting formation. 00:08:09.000 --> 00:08:23.000 And the idea for advice 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 heat multiplicity in the CSE. 00:08:23.000 --> 00:08:36.000 Now one thing that could be done and this is the easy one, is to craft the strategies for Atlas trigger missing at, and for CMS, to develop a dedicated trigger in immune system. 00:08:36.000 --> 00:08:45.000 Now, the stick to the, to the results, and you would see that despite the different strategies, the sensitivities not so different. The are comparable. 00:08:45.000 --> 00:09:02.000 Something to mention before I forget, is that the models are not exactly the same adolescence is having the Brighton ratios. According to a model, while what CMS has a more benchmark model with the branching ratio for this plot is one to add by. 00:09:02.000 --> 00:09:13.000 So, and thanks to note here, for example, if you look at the Atlas, you would see that for low masses here in blue, and for more compressed in areas here, you read these at the graduation sensitivity. 00:09:13.000 --> 00:09:19.000 Also, if you can print the CMS, there's no Tao hedonic interpretation. 00:09:19.000 --> 00:09:26.000 Now looking at CMS, you will not find a BSN he's Hicks interpretation that we see in Atlanta. 00:09:26.000 --> 00:09:38.000 And in terms of expanding the reach, we can see for example, for Atlas, that you could increase the sensitivity at highlights times by just requiring one displays for addicts. 00:09:38.000 --> 00:09:48.000 And for CMS by expanding the decay volumes, one can think of the casing the viral or the case in the, in the HK 00:09:48.000 --> 00:09:58.000 and other things to note that they think they're interested in is what is the complementarity with 16 disabled searches that certainly they contribute at Jai Sita. 00:09:58.000 --> 00:10:05.000 One can also think of signal regions with prompt leptons. And as I mentioned before, this can be used to target very loud lifter hn else. 00:10:05.000 --> 00:10:21.000 And lastly, all the searches are very inclusive and the, they're sensitive to a very wide range of LP scenarios, will be interesting to see what's the sensitivity to dark showers merging jets and split are our TV is 00:10:21.000 --> 00:10:23.000 now one can go farther. 00:10:23.000 --> 00:10:33.000 Be before in the detector, so this is in the HR, and this is something interesting that unless he's doing relying on a dedicated trigger is called the color ratio. 00:10:33.000 --> 00:10:42.000 So you can see here that comparison to searches in calorie meter to searches in the immune system for two different masses. 00:10:42.000 --> 00:10:51.000 Now, because the decay volume is is smaller. This makes the sensitivity difficult to compete with searches in immune system. 00:10:51.000 --> 00:11:08.000 But the way I see, this is that they provide sensitivity, a very short lifetimes, but they also provide an important channel, in case of an excess. And this is more important, given the fact that there is no equivalent searching in CMS. 00:11:08.000 --> 00:11:11.000 And the moment. 00:11:11.000 --> 00:11:23.000 Another thing that this interesting of the searches, is that there used to look for colonnaded electrons for light hydrants with extremely low masses, and here want to highlight described here in blue. 00:11:23.000 --> 00:11:34.000 For a 17 and MeV hypothesis. So, really, really low massive relief and unique area of the face space for for advice here. 00:11:34.000 --> 00:11:44.000 I'm going to change the topic, we're going to discuss non hedonic, the final stage, speaking again to 3060 days. 00:11:44.000 --> 00:11:55.000 I'm going to I'm going to start with a classic one, and displace dialect on hypertext, this is a generic was motivated in many scenarios. 00:11:55.000 --> 00:11:57.000 And I'm going to start with the muse. 00:11:57.000 --> 00:12:01.000 They're very useful just going to start with this one in blue. 00:12:01.000 --> 00:12:13.000 This is an old one, based on 2016 data in Atlas, and this is done in the new system alone. You can see that the sensitivity starts around point one centimeter. 00:12:13.000 --> 00:12:18.000 and this is limited to small opening angle, due to the trigger that he used. 00:12:18.000 --> 00:12:29.000 Now earlier this year as CMS released research and uses a combination of tracker immune system that covers a wide range of see power for me from micro meter two kilometer. 00:12:29.000 --> 00:12:32.000 And this one was limited by the trooper efficiency. 00:12:32.000 --> 00:12:40.000 And then lastly, here in red, you see a search for displays onions in the tracker is done with scouting data. 00:12:40.000 --> 00:12:50.000 And this puts the stringent score strains for a typical tracker lifetime. And this one is limited by requiring Damien vertices in the pixel tracker. 00:12:50.000 --> 00:13:04.000 Now something to note is that have, I have not mentioned, searches for dielectric or died house from a coma verdicts a 13 TV, and this is because there are no no results from from any of the experiments. 00:13:04.000 --> 00:13:09.000 Now, in all cases, I think there is room for improvement. 00:13:09.000 --> 00:13:17.000 By the by the development of dedicated and improved the tonic triggers. 00:13:17.000 --> 00:13:20.000 Now, I'm going to focus on low masses. 00:13:20.000 --> 00:13:31.000 And here we have a search from Atlas, looking at me and colleague at the electrons or meals or light yet whether the RHKL are in the immune system. 00:13:31.000 --> 00:13:35.000 The one that they mentioned from CMS scouting. 00:13:35.000 --> 00:13:43.000 And here I want to stress that this goes all the way down to the dunia threshold, and then LECB is looking at prompt or displays to amuse. 00:13:43.000 --> 00:14:02.000 Now, something to note here, you're not hearing all the plots the x axis is the mass is that there's a little overlap between all the searches. So for example, Atlas here, stops to dv, and CMS stops in the lower end point five this plot, and then LCD 00:14:02.000 --> 00:14:11.000 covers the intermediate part and the gray bank response to regions between two backgrounds. 00:14:11.000 --> 00:14:27.000 Now, something to highlight here is that there is unique sensitivity for add less below 210 NEV using dialect trends. And here I think he has a lot to say there are promising prospects for a prime to eat new searches. 00:14:27.000 --> 00:14:30.000 Now in terms of displacement. 00:14:30.000 --> 00:14:38.000 It's a bit hard to compare, especially with le to be, because the production mechanism is different for this analysis. 00:14:38.000 --> 00:14:47.000 But Atlas is going to farther out in the detector, by looking at the case in the MS and dh calm. 00:14:47.000 --> 00:15:01.000 now. Sticking to low masses, an interesting and challenging experimentally scenario is a production of displays for disease in heavy flavor decades. And this is something that was proved by CMS and our TV with diamonds. 00:15:01.000 --> 00:15:04.000 I haven't seen an equivalent one for Atlas. 00:15:04.000 --> 00:15:10.000 And this is a result of this comparison from from a CMS result. 00:15:10.000 --> 00:15:21.000 So, something to keep in mind is that there are some assumptions done here, in terms of how the signal is produced in order to make a comparison. 00:15:21.000 --> 00:15:35.000 But the take home message of this plot is a typically CMS gain sensitivity as you go to higher masses, while LCD has a unique sensitivity, when you go to below as passes. 00:15:35.000 --> 00:15:51.000 Something also to mention is that this is not the latest displays I mean resolved this is one from, from 2015 2017 so these plugs, could be updated with, with more recent results. 00:15:51.000 --> 00:16:04.000 So something to note, that would facilitate comparison between the experiments, is that it would be nice, for example, to have the he's interviewed him his model for le CB, this is something that is widely used in adolescence CMS. 00:16:04.000 --> 00:16:13.000 Now on the other hand, adolescent CMS, do not have interpretations without the intermediate Higgs, so to become a prime too far. 00:16:13.000 --> 00:16:27.000 And then for add less, we could look at every flavor decades now also I think all these little messages could be made sensitive to hn house with minor modifications, but I think I don't know what the sensitivity, but I think this, this is something that 00:16:27.000 --> 00:16:34.000 will be interesting to, to see. I think they could be competitive. 00:16:34.000 --> 00:16:40.000 Now, I'm going to move to two photons. And these are delayed photos in in the Ico. 00:16:40.000 --> 00:16:53.000 And here they're different strategies between adolescence CNS adolescence looking in a JMS be a model in your benchmark word della piece are producing dr Hicks the case. 00:16:53.000 --> 00:16:59.000 But CMS is looking at GM as the sushi. For examples course sports. 00:16:59.000 --> 00:17:03.000 With this benchmark point. The so called SPS and. 00:17:03.000 --> 00:17:08.000 Now the key difference between the two searches is how they trigger events. 00:17:08.000 --> 00:17:17.000 You can see for Atlas, that they rely on single leptin triggers. You see, for example you can target the associated production. 00:17:17.000 --> 00:17:24.000 While for CMS, you have a dedicated trigger for nonprofit non pointing photos. 00:17:24.000 --> 00:17:28.000 And this also includes some other requirement on HD. 00:17:28.000 --> 00:17:42.000 So as a result, you have, for example, data requirements on utility for CMS compared to add less, but then you have the requirement on the lamp on the leptons for Atlas. 00:17:42.000 --> 00:17:57.000 All these differences, make me 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. 00:17:57.000 --> 00:18:03.000 Here, it's very hard to draw any conclusions. 00:18:03.000 --> 00:18:23.000 So, finally, just few words about hedonic and non hedonic. If the typical Banshee ratio is comparable between the two final states, you see here in the summary plot that non had drunk searches have the tightest constraints for all the lifetimes, essentially, 00:18:23.000 --> 00:18:38.000 but of course this statement strongly depends on the branching ratio. And typically, when has larger branching ratio hedonic finance states, which makes the complementarity between finance states and exploring the full coverage. 00:18:38.000 --> 00:18:44.000 the key to maximize their discovery potential. 00:18:44.000 --> 00:18:53.000 So this brings me to the last topic of the talk, where I want to discuss Susi and charge the Long live particles. 00:18:53.000 --> 00:18:56.000 When I start with indirect detection. 00:18:56.000 --> 00:19:09.000 And this is something that you can have for example, our PPC you have a stop decaying to a laptop and a jet some electronic decay. And this is done by add last. 00:19:09.000 --> 00:19:14.000 Looking at our PV stop so this is the result of the search. 00:19:14.000 --> 00:19:30.000 And then in CMS, you have a displaced, and displace laptop, so this is the result. One of them from CMS, and both cases the results are shown in terms of the lifetime as a function of the mass of the stop for both iOS and CMS so you will be tempted to 00:19:30.000 --> 00:19:31.000 compare them. 00:19:31.000 --> 00:19:42.000 Then, as usual, the devils in the detail. Both have different assumptions on the RTD Kathleen's. The most notable difference is that for the Atlas one. 00:19:42.000 --> 00:19:48.000 One is, you know, switching the couplings that lead to finance states with, with the means. 00:19:48.000 --> 00:20:01.000 And this makes the direct comparison, not possible. 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 00:20:01.000 --> 00:20:05.000 know sticking to our PVC. 00:20:05.000 --> 00:20:20.000 If you see there are different interpretations for different searches so these are the three that I discuss now I bring another one, this, this is a recent one for Elysee be again looking at some electronic decays very interesting search. 00:20:20.000 --> 00:20:35.000 The model is scenarios differently. This is a neutralino 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 their 00:20:35.000 --> 00:20:52.000 PVC coverage and this would facilitate the comparison between between the experiments. Something like minutes left. Okay, something that I liked that he was done in 2018, was this, it was mentioned in the first talk this RPG meets RPC, and this had a 00:20:52.000 --> 00:20:57.000 systematic coverage of RPG searches in Atlas. 00:20:57.000 --> 00:21:11.000 Okay, I moved to display style leptons so typically when you can target slept on of different flavors, you have used me on selection and stout. And if you compare Atlas and CMS. 00:21:11.000 --> 00:21:20.000 And you have, you see that CMS sets, the stronger limiter. The shorter lifetimes. You have to combine these two lines here. 00:21:20.000 --> 00:21:29.000 Now at higher lifetime is the way around. And this is all driven by this year requirements and this comes specially from from the electrons. 00:21:29.000 --> 00:21:39.000 And I think here, there is a possibility to expand to even higher lifetimes by going to to leptons produce beyond the under tracker. 00:21:39.000 --> 00:21:47.000 Also, one can think of signal regions with non isolated displace leptons to make this the searchers even more modern independent. 00:21:47.000 --> 00:21:58.000 Something also to mention is that the leptin PT requirements are quite tight for these searches to pro very low message. So I think there are possibilities to lower them with dedicated triggers. 00:21:58.000 --> 00:22:03.000 And also, if you look at the records here styles. 00:22:03.000 --> 00:22:12.000 These, these are weaker constraints, and this is because there are no dedicated signal regions with reconstructed Atlantic house. 00:22:12.000 --> 00:22:16.000 I think this is also something important for the future. 00:22:16.000 --> 00:22:26.000 This brings me to the last topic, and this, you were probably all aware about the access in the ddx. So this is a hot, hot topic. 00:22:26.000 --> 00:22:38.000 So as you know these are seven events, these drives this leads to a 3.3 Global Access coming from events that were measured with an unpredictability beta, from the ddx measurement. 00:22:38.000 --> 00:22:47.000 But then, when you look at the time of flight measurement from colouring meter immune system. All these events were found compatible with would be taken one. 00:22:47.000 --> 00:22:55.000 So the summary is that the success was not compatible with the considered LPC now. 00:22:55.000 --> 00:23:11.000 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 00:23:11.000 --> 00:23:13.000 that the whole access. 00:23:13.000 --> 00:23:29.000 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 surge is something that was released this year you know is up, and you can see. 00:23:29.000 --> 00:23:32.000 So this didn't confirm the access. 00:23:32.000 --> 00:23:40.000 And this was based on the ddx immune system, MDT, or in the security. 00:23:40.000 --> 00:23:55.000 Now, other possibility, and here I go back to the one of the limits from from the paper that the access would be compatible with with NLP with, with a lifetime, say between three to 10 nanoseconds. 00:23:55.000 --> 00:24:07.000 And I highlight this this winner in 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. 00:24:07.000 --> 00:24:11.000 Similar window. It's also probed by Atlas disappearing track. 00:24:11.000 --> 00:24:23.000 The maximum sensitivity for Atlas is achieved at the bit lower lifetime, compared to CMS but still he should have good sensitivity. If this is the case. 00:24:23.000 --> 00:24:24.000 And the last week. 00:24:24.000 --> 00:24:34.000 If the beat is smaller than one in state, and it's stable, this could show up in a stop particle search on tracker plus the time of flight search. 00:24:34.000 --> 00:24:37.000 Probably this is the most interesting one. 00:24:37.000 --> 00:24:38.000 The latest results. 00:24:38.000 --> 00:24:49.000 It was from CMS in 2016 with partial beta, and it didn't see any access. But this should be updated with the full time to beta. 00:24:49.000 --> 00:24:51.000 Now here I didn't mention how it should be. 00:24:51.000 --> 00:24:54.000 but something to mention is that Atlas. 00:24:54.000 --> 00:25:06.000 Be did a direct detection search back in 2015 with the leak detector. So it will be, it will be good to see fallacy be as something that can be done in case the successes Israel. 00:25:06.000 --> 00:25:10.000 I'm not aware of anything more recent. 00:25:10.000 --> 00:25:18.000 Now, Long story short, is that so far there is no any other access in any other architects. 00:25:18.000 --> 00:25:33.000 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 and the direct comparison between experiments 00:25:33.000 --> 00:25:41.000 is sometimes possible. And this is for the case where searches the experiments provide results in benchmark models. 00:25:41.000 --> 00:25:47.000 Now their searches for other piece are highly motivated, regardless of the access. 00:25:47.000 --> 00:25:56.000 And I think the key is that the complimentary signatures and various of detectors would be by them to confirm a possible observation. 00:25:56.000 --> 00:26:13.000 And then finally, I think I expect, massive gazing sensitivity in in 24 other p searches thank would expect to run to and this will be driven thanks to all the developments on the trigger side and improved analysis techniques. 00:26:13.000 --> 00:26:19.000 And yeah, I really look forward to it, and later taking meetings around the corner. 00:26:19.000 --> 00:26:37.000 Okay, thank you very much. Have a nice interesting display of the interplay between the three main detectors, we open this law for questions before I have used my chair power and ask you a bunch of things. 00:26:37.000 --> 00:26:42.000 Okay, so a cheetah we go first. 00:26:42.000 --> 00:26:53.000 So quick question on the various beginning of the slides you were talking about for interpreting hmm searches or two xx, and you go back to that because I'm. 00:26:53.000 --> 00:26:59.000 I'm not sure because he will never give you a prompt object. Now, 00:26:59.000 --> 00:27:17.000 this one. Yeah, for example. So, here you can have the WDKHNL or the ZDKHH another channel production is going to be very surprised by, you know, you have to have a creative model. 00:27:17.000 --> 00:27:31.000 Maybe I was not clear enough, say, forget about the cabinet just think about the final state. So here you could have a problem leptin from the WDK, and then some displays object from 60 K. 00:27:31.000 --> 00:27:36.000 So effectively, you have from leptin displace FedEx. 00:27:36.000 --> 00:27:47.000 So, is it the different model, but the leads to a similar final state. 00:27:47.000 --> 00:27:59.000 Yes, but I would still not usually expect this to be worse, because for two reasons one is because this is only applicable to 00:27:59.000 --> 00:28:11.000 left and left on neutrino final state you can't do it for you will probably bet it will be worse for ljj final stage just because you have a three body versus two body kinematics. 00:28:11.000 --> 00:28:25.000 Thank you. You mean better words, with respect to what HHX is dedicated would still be, that's my, my you Please speak. Just because you have a kinematic differences. 00:28:25.000 --> 00:28:38.000 Say, think of the search for the memory I'm gonna change the argument maybe I can convince you this way. So we have done searches for prompt dialect on a look for LPs coming from the Higgs. 00:28:38.000 --> 00:28:42.000 And we see that we have good sensitivity. 00:28:42.000 --> 00:28:50.000 Now, you agree with me that this production mechanism, it doesn't depend on the C boson so this is just a hand up to three. 00:28:50.000 --> 00:28:58.000 So it plays to see by a W, and then do the same logic with just one from leptons. 00:28:58.000 --> 00:29:15.000 And then you end up with what you end up with a different search, because you have to move one of the prom leptons but you you have sensitivity to this this this very same model, yes what what what I'm not even trying to think about is your HTML DK in 00:29:15.000 --> 00:29:33.000 a genuine internet search is a three body dkH to XXDK in a genuine he is a poor body Deacon. That's what I'm thinking about, I think when we need to see if the out of the box search, one has to change the requirements and the number of the tracks. 00:29:33.000 --> 00:29:46.000 into the details. What the heck's is decaying to a guy I agree that one would need to do the check, but conceptually, you know, it's still a problem with the displays of this I agree with you but this this tool is the three body DK that's where I'm a 00:29:46.000 --> 00:29:47.000 bit. Yeah. 00:29:47.000 --> 00:30:03.000 Yeah. I think I understand your point I think this needs to be checked. I think that the whole point when I added this is that, you know, tagging the prompt from the WDK and look for another object on the other side, without having to worry about the 00:30:03.000 --> 00:30:04.000 trigger. 00:30:04.000 --> 00:30:08.000 You know, thinking about the strategy, replacing the seat for the W. 00:30:08.000 --> 00:30:17.000 This Yes, I agree and. How's it going, I can I ask another question. Yes, sir. Thank you. 00:30:17.000 --> 00:30:19.000 If you look at slide 25. 00:30:19.000 --> 00:30:41.000 I notice something very nice, which is the division where, for example, CMS doesn't seems to be not silver doesn't look at Damien resonances between yeah exactly point seven 2.9 or something like that, but it does does. 00:30:41.000 --> 00:30:51.000 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. 00:30:51.000 --> 00:31:05.000 But let me just comment on Atlas. I think this could be that the backlinks are very different. So, the search is done, relying on the edge over, eat for example for the search for hedonic Decatur electrons. 00:31:05.000 --> 00:31:15.000 And it's not using information for the tracker, or in this case, you have you no problem the case in the tracker from standard mode resonances of these masses. 00:31:15.000 --> 00:31:36.000 So, by using other detector you have different backgrounds, so I can imagine that Atlas by not tagging using tracking information, can, can be conservative for all these masters, and maybe there is an analyzer from Atlas can see how we can do this. 00:31:36.000 --> 00:31:48.000 I put it differently probably CMS can cover that if it changes the strategy. I think in CMS if you would not rely on the tracking, certainly, you could make this narrow it. 00:31:48.000 --> 00:31:50.000 Thanks. 00:31:50.000 --> 00:32:03.000 I think I 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 object search and more of a distinct displaced object search. 00:32:03.000 --> 00:32:25.000 So we do have a group that's doing like a prompts object oriented search, that's similar to the one that you have share, whether using enter detector type objects, whereas this one didn't so that may also account for some. 00:32:25.000 --> 00:32:33.000 So, this is this this kid has come in the thing we can try to go to Juliet. Yes, thank you. 00:32:33.000 --> 00:32:34.000 Thank you very much. 00:32:34.000 --> 00:32:55.000 It's just a curiosity so if we're running behind we can skip me now Okay, okay, okay, it'll be fast. 00:32:55.000 --> 00:33:05.000 without the the common vertex. I feel my, My thought is that this would be hard, because we sort of rely on the isolation to beat down the backgrounds. 00:33:05.000 --> 00:33:20.000 On the other hand if you wanted to 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. 00:33:20.000 --> 00:33:35.000 Can you tell me more about the this thought, Well, okay, this is, I fully agree, I mean that certainly the battery would blow up, but certainly one would have to put tighter requirements on displacement on the PT of the leptons such that you start to 00:33:35.000 --> 00:33:51.000 cut away the backgrounds from Santa Monica processes, when do you find a gym. When has some sensitivity with signals with non isolated leftist, I cannot tell you what displacement, it will be what PT requirements, you would need. 00:33:51.000 --> 00:34:02.000 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. 00:34:02.000 --> 00:34:07.000 Yeah, I think you've got an excellent point. Thanks. 00:34:07.000 --> 00:34:16.000 But I fully agree that for these analysis you remove the isolation, then you're dead. 00:34:16.000 --> 00:34:22.000 Okay, so I see one of my by was asking about slide 20, 00:34:22.000 --> 00:34:25.000 because it's something that caught my eye in the caption. 00:34:25.000 --> 00:34:46.000 So euro that this is a scale of Savage, to the the body's quite a specific diva so I'm tempted to interpreted as you as the probably see on the same footing or something particularly the next DVD but I'm just a gun show you up my mind. 00:34:46.000 --> 00:34:48.000 I think you're right maybe I was. 00:34:48.000 --> 00:34:51.000 I didn't think about this so the search. 00:34:51.000 --> 00:35:01.000 It has, so it provides results 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 tiles. 00:35:01.000 --> 00:35:14.000 In a similar manner so benchmark with hundred percent that you can play around and do the meeting as you want. So, it is not that this is a model that favors light hydrants or anything like that. 00:35:14.000 --> 00:35:18.000 Okay, thank you. 00:35:18.000 --> 00:35:26.000 Okay, so I shall we move on to the next speaker. Thank you sir. That was a very nice. 00:35:26.000 --> 00:35:36.000 Yes. So Isaac, are you around we don't see you in zoom so just confirming. 00:35:36.000 --> 00:35:43.000 Okay, it doesn't seem like our next speaker is here yet so maybe we can move on to Josh and what you on. 00:35:43.000 --> 00:35:48.000 Are you around and you be willing to share your slides. Hello. Hello, can you hear me. 00:35:48.000 --> 00:35:52.000 Yes, yes. 00:35:52.000 --> 00:36:09.000 Okay, let me share my slides. 00:36:09.000 --> 00:36:26.000 Can everyone see the shirt. Okay. Hello everyone. Glad to have this opportunity to present our new social strategy for the lonely would particle which is producing and detecting the lonely with particles at different experiments at MC. 00:36:26.000 --> 00:36:33.000 And here's the link for this paper if you are interested, you can search for more details. 00:36:33.000 --> 00:36:46.000 Okay, so this is the outline but today. First is a very brief overview for Nollywood particles, and as they become to the social strategy. And after that, there will be the even selection background and a trigger. 00:36:46.000 --> 00:37:08.000 And finally, is the experiment, expected limit and end with the summary. Okay, so this is a very brief overview for new particles because for this part is already well presented by the previous overview presentation, and so ever just a very quick. 00:37:08.000 --> 00:37:11.000 So new particles generated. 00:37:11.000 --> 00:37:17.000 So existed in standard model and are many extension of the standard model like Susie Henan sector. 00:37:17.000 --> 00:37:36.000 And there are four reasons for particles that can be long lived. We set up, we've said pie for example, there are small carbon constants small mess leading to decay product, large media mediator mess and a lot to depression discovery of BSN lonelier particle 00:37:36.000 --> 00:37:40.000 indicate new hierarchies are O'Hara to see new places. 00:37:40.000 --> 00:37:59.000 Okay, so this is the model that we are interested in that is the hidden value model is kind of blown to the duck sector. So for the doctor is still remains largely unknown and the in the red part is a conceptual diagram for the hidden value model. 00:37:59.000 --> 00:38:18.000 Okay, so in the left part is the physics process that we are interested in, which is the shower and the hidden sector, distribute energy too many soft Hidden Valley muscles and this muscles became to me was in the red part is the energy distribution for 00:38:18.000 --> 00:38:37.000 the, for this process here reset the mice, 200 GV had a valley mess on the mess for Hidden Valley Muslim equals 2.3 GV, and to expect it, or average Lee environment there will be 40 Hidden Valley muscles. 00:38:37.000 --> 00:38:50.000 Ok so now is the searching strategy. So currently the surgery strategy roughly for into two categories. First is new search or trigger strategies, and another one is adding new models. 00:38:50.000 --> 00:39:06.000 And we come up with a new searches, we proposed a new social strategy which is using existing philosophies as far detector to produce the logo particle at one experiment, and the detect the lonely particle at another experiment. 00:39:06.000 --> 00:39:26.000 So in the red part is all the possible combinations here, and the combination of to use the our city analysis to produce the lawyer particle and they use Atlas texture to detect the Dalai Lama particle has the smallest distance. 00:39:26.000 --> 00:39:42.000 And the zoom. So, what are we looking for. So we based on that film underground we focus on the moon channel. There are two reasons we choose this meal on channel because, first is the Mian can travel alone in the left plot, you can see this is the stop 00:39:42.000 --> 00:39:45.000 loss for me on propagate in there. 00:39:45.000 --> 00:39:54.000 And for the red part is the music direction, barely changed during the propagation. 00:39:54.000 --> 00:40:04.000 Okay. And so, because of this the ideal combination would be use sab or Alice to produce the lottery particle and use Atlas to detect. 00:40:04.000 --> 00:40:20.000 So there are three advantages for ATLAS detector. One is this combination has the smallest distance and Atlassian is not directly on the forward direction of our city and Alice but very close to the forward direction of our CBS Alice. 00:40:20.000 --> 00:40:39.000 And the third reason is, Atlas has a very large volume of Atala as a volume of the number of catalogs is pretty large abundant the lofty. So, for Hello, not to run, we suppose our CP is 10 times lower than the Illuminati varsity is 10 times lower than 00:40:39.000 --> 00:40:41.000 Atlas. 00:40:41.000 --> 00:40:50.000 And for Alex with the, we are not sure so come by our city and Alice we assume 500 University at the bar. 00:40:50.000 --> 00:40:54.000 Okay so nice the events selection. 00:40:54.000 --> 00:41:07.000 So there are few things that we can use to select our signal. The for the rep. In the left plot. This is the theater distribution of incoming neurons in the coordinates of Atlas direct detector. 00:41:07.000 --> 00:41:14.000 From this plot we can see that the new ones from long ago particle decay, have a preferred indicate angle. 00:41:14.000 --> 00:41:29.000 And we also will requires a PT, the PT of the mirror and ladders on Wednesday between ensure moto haze in the neon chamber, and also the information call can also be useful for is this the timing. 00:41:29.000 --> 00:41:35.000 Timing is Chris is reverse the two that have a meal from Atlas collegian. 00:41:35.000 --> 00:41:52.000 And also, most of the meals will have large display will have large displacement or the larger impact parameter. And there are also some other even selection we can apply in the offline offline person. 00:41:52.000 --> 00:41:57.000 Okay so, after the signal via talk maybe we'll talk about the background. 00:41:57.000 --> 00:42:08.000 See I feel potential background of potential associates of the background. First is the cosmic renew on, but the cosmic revenue on can be removed using the directional information. 00:42:08.000 --> 00:42:22.000 So if you see if the cosmic room you all want to hate that last detector in harassing direction, it needs to passing through 336, kilometers of rocks. 00:42:22.000 --> 00:42:35.000 So it will require very very high energy, and another background is from the radiative environment. So this can be removed by requiring the new one PT larger than one TV. 00:42:35.000 --> 00:42:42.000 And there are also some possible milk high energy music directly from ash city or Alice. 00:42:42.000 --> 00:42:56.000 So far this, we estimated the expected number of this process and the expected number of humans is around 0.1, as this other based on 500 immersed into bar. 00:42:56.000 --> 00:43:16.000 And if you want to know the, how we estimate this, you can see the backup, and the for neutrino commercials. Also we assume the estimate is it for this process and expected a number of events is also at 0.01 order, based on 500 immersive into bar. 00:43:16.000 --> 00:43:23.000 Okay so, and also there will be some background from Atlas cleaner itself. So first days. 00:43:23.000 --> 00:43:34.000 We can require that the pointing the incoming the arm pointing back to the production site, like our CBS alleys and mostly. 00:43:34.000 --> 00:43:46.000 Most of you are from Atlas collegian, you have small impact parameter, and also the time information can be helpful, like, in, out, in track versus. 00:43:46.000 --> 00:43:48.000 Inside Out to track. 00:43:48.000 --> 00:43:56.000 So basically this strategy is background free. 00:43:56.000 --> 00:44:08.000 OK, so the fact that to track this to track this signal is not a credential surgery strategy and it will also require some update on the trigger. 00:44:08.000 --> 00:44:17.000 So, in the top floor in the top part, there's two plot come from the Atlas new Smallville Dr. 00:44:17.000 --> 00:44:20.000 In the red in the left plot. 00:44:20.000 --> 00:44:23.000 Here is how ATLAS detector. 00:44:23.000 --> 00:44:30.000 So, this is how Atlassian Hector to distinguish the signal versus the background. 00:44:30.000 --> 00:44:46.000 So they have a parameter named appointing angle, and in the red plot. If you can see that based on the cut for the pointy angle, you can remove, you can keep most of the signal and reject and most of the background. 00:44:46.000 --> 00:45:04.000 Most of the background. So we found that this strategy can be large bird can be large broad by our purposes. The first is we defined a defined the pointy angle one as the angle of the segment with respective to an efficient momentum track. 00:45:04.000 --> 00:45:13.000 You know another word line from interaction point of ATLAS detector to the settlements radius positioning the new Smallville. 00:45:13.000 --> 00:45:18.000 You can also see the top lot of the dirtiest detail is basically the point angle one. 00:45:18.000 --> 00:45:35.000 And soon. We can define a similar pointy angle, that is the angle of the segments in the big room with respective to an infinite momentum track, another, another words is a line from the interaction point of our car Alice. 00:45:35.000 --> 00:45:50.000 So by requiring that the point and go to around zero and Aponte and mango pointy angle one larger than 0.25, we can keep our signal and the reject most of most of the background from Atlas collision. 00:45:50.000 --> 00:45:53.000 Ok so now is the expected limit. 00:45:53.000 --> 00:46:11.000 So, you can see the left plot is the expected expected limit for our social strategy and for this plot one PVNGVPD Carter was applied and the internet plot is another Ace from this paper. 00:46:11.000 --> 00:46:33.000 And this plot shows the some social strategy based on Atlas MSNRCB itself. So you mean purposes for this plot is to show that we have different left, we have different lifetime range for the, for the strategy you can see. 00:46:33.000 --> 00:46:48.000 Okay, so now is the summary. Somebody proposed a new lawyer particle surgery strategy obese background free and the very low cost of we don't need to build, build new models models, and we have sensitive to large left hand range. 00:46:48.000 --> 00:47:04.000 And also this service draft you can serve as a pendant cross check for that long lifetime scenario. And we are also trying to implement implement this to use ms detector to detect the new particles. 00:47:04.000 --> 00:47:07.000 Okay, that's all from my side. Thank you. 00:47:07.000 --> 00:47:17.000 Thank you very much that's certainly an interesting idea. Do we have questions from the audience, 00:47:17.000 --> 00:47:28.000 or comments about visibility from any of the experimental experts. 00:47:28.000 --> 00:47:32.000 So I sorry I should raise your hand. 00:47:32.000 --> 00:47:42.000 So did they The only thing that could be confusing is because essentially you're saying I produce a particle Atlas and I look for it in CMS. Right. 00:47:42.000 --> 00:47:44.000 Yes, if you want to send all. 00:47:44.000 --> 00:47:54.000 The only thing I'm not sure what I'm probably people from either experiment can say, if, if something, let's say, non GM one cup in and they see the signal. 00:47:54.000 --> 00:48:02.000 Maybe they blocked it because it seems that something is malfunctioning. That, that essentially neither know if you look into if that's the way that. 00:48:02.000 --> 00:48:13.000 For instance, a section for the cosmic rays or, or any kind of father field that would essentially meet your signal, this is something that honestly I, I don't know if that's a concern or not. 00:48:13.000 --> 00:48:23.000 Yes we if we based on the current trigger strategy and things that we both probably happen. But, so which means we need to update some. 00:48:23.000 --> 00:48:37.000 We need to update the trigger strategy maybe have some new trigger algorithm for this. If we want to use them as detector. Yeah, I mean I obviously not trigger is a problem but I'm saying, if you would pass an existing trigger within two weeks, killed 00:48:37.000 --> 00:48:48.000 by a sort of first round of pre selection of filters, because your particular looks like the cosmic ray or look like some of the detectors is malfunctioning at the moment. 00:48:48.000 --> 00:49:02.000 And then they just thrown away This is, this is Michael separate but sure I mean, Maybe they get it solves the problem, I for cosmic rays, mostly from top to bottom, but we will have we can have a lack of direction cut. 00:49:02.000 --> 00:49:14.000 We only accept as a particle come from the production point of this lonely particle, which is maybe the ATLAS detector detectors, we have a preferred indicates angle. 00:49:14.000 --> 00:49:23.000 I think that can help us to reject most of the cosmic review on because we've come from the horizon direction. 00:49:23.000 --> 00:49:25.000 Okay. 00:49:25.000 --> 00:49:29.000 Yes, thank you. 00:49:29.000 --> 00:49:38.000 Yeah, I think in the end, I didn't quite understand what you're envisioning as the actual procedure. 00:49:38.000 --> 00:49:55.000 Can you go back to your plot where you showed some limits yeah so so you're imagining here that you detect three simultaneous nuance or something like that from from the direction of like CB and that's the signal you're looking for this. 00:49:55.000 --> 00:50:02.000 Yes, so we can help that our new signal from adversity direction from outside to the inside. 00:50:02.000 --> 00:50:11.000 And based on the previous analysis that theoretically they won't have this such signal. 00:50:11.000 --> 00:50:15.000 If based on other background process. 00:50:15.000 --> 00:50:28.000 Well okay, I mean, you, you, you made various arguments about what you're 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 have any point say that you know 00:50:28.000 --> 00:50:35.000 you're looking for new ones that arrived simultaneously and if that's what you're looking for, well that's, that's going to be background free, just by that. 00:50:35.000 --> 00:50:37.000 Yes. 00:50:37.000 --> 00:50:43.000 So it seems to me that's probably more important but then, How did you. 00:50:43.000 --> 00:50:59.000 So, so how did you mean, that seems to me 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 in showing that, you know, for this plot. 00:50:59.000 --> 00:51:02.000 Yeah. Okay. 00:51:02.000 --> 00:51:08.000 Yeah okay so he's basically based on the Monte Carlo simulation and regenerate the such process by PC. 00:51:08.000 --> 00:51:31.000 And we simulate the propagation process for the neuron propagating the earth by music software that to do the nuance simulation and make calculated how many neurons can reach the same as can reach the detector. 00:51:31.000 --> 00:51:35.000 And then we'll get our acceptance and. 00:51:35.000 --> 00:51:46.000 Okay. Yeah so so so for. So, for example, you were taking some sort of dark shower model, what kind of signal acceptance did you actually have. 00:51:46.000 --> 00:51:48.000 So for the signal we have. 00:51:48.000 --> 00:51:52.000 Okay, so for the signal we have is the. 00:51:52.000 --> 00:51:55.000 So we have a light. 00:51:55.000 --> 00:52:13.000 Feels lectures for our signal first AC come from that the angle to the point and go back to the so he's come from a certain angle, angle range, and the new on PTC ladders and when gv. 00:52:13.000 --> 00:52:25.000 And so he can pass the music simulation that have enough energy to hit the, the detector detector. 00:52:25.000 --> 00:52:34.000 In the end, are you are you getting like 10 to the minus four types of time is eight what what what kind of race, do you need in order to be able to get a few events. 00:52:34.000 --> 00:52:45.000 I'm home and you will see that continue as can reach the detective detector. 00:52:45.000 --> 00:52:50.000 So think just what we need. 00:52:50.000 --> 00:53:05.000 Yeah, I think maybe it's better to talk about numbers offline, in case people don't remember, Mike. Do you have a question. Yeah, just comment. So it seems, CMS to Atlas because they're like nine kilometers, eight, nine, kilometers apart, sort of angle 00:53:05.000 --> 00:53:21.000 is really tiny Southern angle that counts in the central region, whereas LHCB to address that because of the other way around also actors has fire luminosity so detecting things, and it should be more interesting but there. 00:53:21.000 --> 00:53:37.000 Yeah, I mean, I'm wondering about background from all around the ring, there have been Halo interactions on the beam pipe. Okay, producing for particles is fixed target of course but still you're going to get a lot of background I think from around the 00:53:37.000 --> 00:53:45.000 ring from forward norms into as. Have you considered that background 00:53:45.000 --> 00:53:46.000 for this background. 00:53:46.000 --> 00:53:51.000 I think we. 00:53:51.000 --> 00:54:02.000 So I think, so that's the problem that is Atlas is not directly in the former director of our CBQC The plot is also a conceptual process. 00:54:02.000 --> 00:54:11.000 But it's close, but not directly under our under our CB forward direction and for that background. 00:54:11.000 --> 00:54:19.000 We didn't estimate, very carefully but expected number of events will be small. 00:54:19.000 --> 00:54:26.000 Smaller than one is smaller than one. Okay, in impress. 00:54:26.000 --> 00:54:33.000 Okay. All right. I mean, it is it's I think it's gonna be an issue because you do, you do have a lot of interactions of. 00:54:33.000 --> 00:54:46.000 Yeah, we can all have some very more careful estimation for this. Yeah, I think, let me check. Thank you. Thank you. 00:54:46.000 --> 00:54:49.000 Thank you. I don't see any more hands. 00:54:49.000 --> 00:54:54.000 Maybe I can just a compliment to the beam background. 00:54:54.000 --> 00:55:00.000 So, the direction of RSVP to as athletes. 00:55:00.000 --> 00:55:10.000 It's in the and the coverage is not in the close to the beam, beam time. So that should not be an issue. 00:55:10.000 --> 00:55:12.000 It's about time. 00:55:12.000 --> 00:55:18.000 Eight, right. So, it's an undercover region. 00:55:18.000 --> 00:55:31.000 When I'm also thinking about interactions that are only, you know, hundreds of meters upstream of NHCB if you're using it, or at Atlas. 00:55:31.000 --> 00:55:32.000 Anyway, okay. 00:55:32.000 --> 00:55:38.000 It's point. Thank you. 00:55:38.000 --> 00:55:40.000 All right. 00:55:40.000 --> 00:55:45.000 Isaac, are you there yet. 00:55:45.000 --> 00:55:52.000 Okay, so we seem to have somehow lost the final speaker of the session. 00:55:52.000 --> 00:56:22.000 So shall we just closed for today, was it.