1 00:00:06,480 --> 00:00:09,240 Okay, can you see slides? 2 00:00:09,510 --> 00:00:10,080 Yes. 3 00:00:10,410 --> 00:00:14,850 Okay, good afternoon, everyone. I'm going to present on behalf of the CMS eta 4 00:00:14,850 --> 00:00:19,380 collaborations about it. measurements that we have performed soft QC and diffractive 5 00:00:19,380 --> 00:00:27,750 processes. As an outline, I'm just here would like to emphasize that I'm focused 6 00:00:27,750 --> 00:00:32,820 on the forward directors of the CMS and the measurements related with the soft QC 7 00:00:32,820 --> 00:00:38,940 and frankly processes that was recently published, will be presented and then I 8 00:00:38,940 --> 00:00:44,370 will summarize Michael. Okay, as the introduction already given by the previous 9 00:00:44,370 --> 00:00:51,330 speakers, I would like to skip this. This slide number three, and come to the board 10 00:00:51,330 --> 00:00:55,860 the directors at CMS. What we can see in here is, this is a schematic we will the 11 00:00:55,860 --> 00:01:02,100 CMS detector, and Suzanne going to present results related with the cost store and 12 00:01:02,100 --> 00:01:08,850 the totem very forward detectors. The cost stories was placed in this area and the 13 00:01:08,850 --> 00:01:15,600 totem is placed in this area. The cost store was a tungsten quartz Chernenko 14 00:01:15,600 --> 00:01:21,390 sampling color meter and it was separated electromagnetic and hydraulic sections for 15 00:01:21,390 --> 00:01:27,660 the Tata measurements it is measuring the leading protons at different ranges from 16 00:01:27,660 --> 00:01:32,790 the interaction point. And the important thing is here, it has the small tracking 17 00:01:32,790 --> 00:01:37,710 detectors measured the displacement of protons scattered at small angles with 18 00:01:37,710 --> 00:01:44,760 respect to the beam. slide number five, the double polygon scattering Let me 19 00:01:44,760 --> 00:01:51,540 remind you the double part on scattering events that have too hard scatters within 20 00:01:51,540 --> 00:01:56,880 say protons. The DPS processes are becoming increasingly important when you 21 00:01:56,880 --> 00:02:02,880 go to the higher center of mass energies and it can be Good to have any information 22 00:02:02,880 --> 00:02:07,950 about the transfers profiles to proton PDS, if you would like to write the cross 23 00:02:07,950 --> 00:02:12,570 section of the DPS as you can see in the box of the formula, this is a very 24 00:02:12,570 --> 00:02:18,990 simplified formula of the TPS. And here is the m is the number of the distinguishable 25 00:02:19,050 --> 00:02:26,370 part from Excel processes, and is equal to unity when the the SPSS processes like a 26 00:02:26,370 --> 00:02:37,050 and b are equal to otherwise and is equal to for the effective transfers, it's very 27 00:02:37,080 --> 00:02:42,780 effective production, which is regarded as an important thing to transfers profile of 28 00:02:42,840 --> 00:02:49,320 art or it can be assumed to be processed and energy dependent, independent. Sorry, 29 00:02:50,400 --> 00:02:54,420 slide number six. One of the most promising 30 00:02:55,560 --> 00:03:00,000 processes to study DPS is the W was on production. This is a kind of question 31 00:03:00,000 --> 00:03:08,250 benchmark versus LFC especially the same sign ww VPS. To leptons is very, very 32 00:03:08,250 --> 00:03:13,050 promising theoretically we have made a publication recently made a publication in 33 00:03:14,250 --> 00:03:19,800 in CMS collaboration and it has a very clean final state having two leptons with 34 00:03:19,800 --> 00:03:25,410 some missing et. So we can get information about the proton PVS structures and we can 35 00:03:25,410 --> 00:03:30,660 improve the MonteCarlo models by using this kind of measurements. The figures 36 00:03:30,660 --> 00:03:37,380 that are shown in here on the left hand side in the trace the production of the 37 00:03:37,380 --> 00:03:44,460 same site, WW, why DPS process and on the right hand side, why are the SPS at 38 00:03:44,460 --> 00:03:51,690 leading order in perturbative qc? And so the event selection criteria are already 39 00:03:51,720 --> 00:03:55,770 given at the bottom of the slide and I don't want to go into the details but I 40 00:03:55,770 --> 00:04:00,870 just would like to emphasize in order to reduce the contributions coming From the 41 00:04:01,080 --> 00:04:07,110 QC the Multijet production we have applied the PTM is about 15 G and some extra Vito 42 00:04:07,140 --> 00:04:18,360 applied on additional emu and Tao hydronic tell candidates This is the DPS w w x 13 43 00:04:18,360 --> 00:04:26,490 team results. So, since, we would like to discriminate the signal from the dominant 44 00:04:26,490 --> 00:04:32,940 background processes we have used multivariate classifiers especially the 45 00:04:32,970 --> 00:04:38,520 backgrounds coming from and called as front electrons and neutrons coming from w 46 00:04:38,520 --> 00:04:46,050 Zed or tower leptons and not from ones are originated from heavy quarks or forks and 47 00:04:46,050 --> 00:04:53,040 Boolean jets in which are incorrectly constructed as leptons. So, we have used 48 00:04:53,040 --> 00:04:57,840 the maximum likely fit to do finance misfire as you can see on the top of the 49 00:04:59,340 --> 00:05:05,460 slide The final BGP classifier output for the EMU, a final states argument and on 50 00:05:05,460 --> 00:05:11,580 the bottom, it's given for the new final states. One can use this to separate the 51 00:05:11,730 --> 00:05:17,370 charge for maximum sensitivity. And what we can observe in here is, there's a 52 00:05:17,370 --> 00:05:22,980 sensitivity, actually more sensitivity to plus plus configuration rather than the 53 00:05:22,980 --> 00:05:33,330 minus minus one. So the results obtained from this maximum likely fit to the final 54 00:05:33,330 --> 00:05:38,640 classifier distribution are given in this table. As you can see, this is the cross 55 00:05:38,640 --> 00:05:46,020 section update with PTR factorized by using a factorized approach, and that's 56 00:05:46,020 --> 00:05:53,070 the data from the this is the value that we have measured, and that's the 57 00:05:53,070 --> 00:05:58,770 significance having with 3.9 standard deviations on the bottom of the slide, but 58 00:05:58,770 --> 00:06:05,610 met the observation cross section menus for inclusive VPS WWE production and Opie 59 00:06:05,610 --> 00:06:11,160 from plus and minus electron charge configurations along with their 60 00:06:11,160 --> 00:06:17,610 combination are shown for the effective cross section which are extracted from 61 00:06:17,610 --> 00:06:22,560 this, from this measurement, as you can see at the bottom of the right figure is 62 00:06:22,560 --> 00:06:27,450 compared with the previous measurements and experiments at different center of 63 00:06:27,450 --> 00:06:35,520 mass energies. I would like to become one another important for the measurement that 64 00:06:35,520 --> 00:06:40,410 we have performed and published last year. So, I just would like to emphasize this 65 00:06:40,410 --> 00:06:45,600 was the first correlation study on how to not activity at very forward and central 66 00:06:45,600 --> 00:06:50,910 rapid cities. At tourism TV. This measurement was performed by using the 67 00:06:50,910 --> 00:06:57,090 customer directive which I was mentioning in my previous slides. I don't want to go 68 00:06:57,090 --> 00:07:02,640 into the details of this strategy, but I just like to To say that the average total 69 00:07:02,700 --> 00:07:10,080 energy reconstructed in the customer color meter, and normalized to the first thing 70 00:07:10,080 --> 00:07:16,890 is is shown as a function of the number of the tracks where the durability absolute 71 00:07:16,890 --> 00:07:22,050 value is less than two. And here you can see the data is compared with different 72 00:07:22,110 --> 00:07:29,370 MonteCarlo models, as well as the high energy cosmic ray air showers. And we can 73 00:07:29,370 --> 00:07:34,290 easily see that there is an increase with the number of the tracks and the 74 00:07:34,290 --> 00:07:41,130 underlying parameter tunes like peaks eight is CP five, which was determined at 75 00:07:41,130 --> 00:07:47,160 Central rapids and this can be safely extrapolated to the forward regions. When 76 00:07:47,160 --> 00:07:52,500 we look at these two plots, we can say that CBO two one gives the best 77 00:07:52,500 --> 00:07:54,180 description of all. 78 00:07:58,019 --> 00:08:03,239 We have also checked the error electromagnetic and hydronic energy ratios 79 00:08:03,269 --> 00:08:08,969 and since it is sensitive to the details of that organization and discrepancies 80 00:08:08,969 --> 00:08:13,979 between models and data may reflect an inadequate description of the production 81 00:08:13,979 --> 00:08:21,959 mechanism. So, the ratios as you can see is approximately constant over the whole 82 00:08:21,959 --> 00:08:26,999 multiplicity region and there is no dramatic change of the particle production 83 00:08:26,999 --> 00:08:33,989 mechanism is observed especially at the at this very for durability region. And we 84 00:08:33,989 --> 00:08:42,689 can say that all model predictions are lower than the data but the Q GS jet two 85 00:08:42,689 --> 00:08:48,389 and Siebel two one and her Excel one provides the best description of the data. 86 00:08:50,250 --> 00:08:55,080 I would like to come to the practice measurements that we have recently perform 87 00:08:55,080 --> 00:08:56,370 and it is a 88 00:08:58,080 --> 00:09:03,660 CMS physics artists summary, it's about the heart color seeing that exchange in 89 00:09:03,660 --> 00:09:08,010 digesting amounts at certain TV. So, let me first introduce you to this kind of 90 00:09:08,040 --> 00:09:13,230 events. Events with two high PT jets separated with a large trip together and 91 00:09:13,230 --> 00:09:17,490 there shouldn't be any particle activity in between those jets as you can see, 92 00:09:17,820 --> 00:09:22,710 here, this is the jet capture event and on the right hand side on top, you can see 93 00:09:22,710 --> 00:09:32,280 the jet capture events and events in the in the fire ater plane. So, this kind of 94 00:09:32,880 --> 00:09:40,290 such studies actually and the vehicle black diamonds are largest topless in such 95 00:09:40,290 --> 00:09:47,940 kind of measurements and one can easily study the BFF O'Mara exchange, which is 96 00:09:48,270 --> 00:09:56,820 the color singlet exchange where the two blown tea channel exchange so the central 97 00:09:56,820 --> 00:10:01,560 gap signature can be destroyed by so far on internet And there's a one important 98 00:10:01,560 --> 00:10:07,260 pyrometer factor Actually, it's called rapidly to gaps or why will probability 99 00:10:07,470 --> 00:10:12,780 and it's a kind of number two, but it's a multiplicative factor. And it can have 100 00:10:12,930 --> 00:10:18,750 when you bought the high energy energies, especially the LSC and RDC, this parameter 101 00:10:18,750 --> 00:10:26,580 is having this type of starting from 0.2 up to 10 to the minus two values. So, in 102 00:10:26,580 --> 00:10:31,710 this analysis, we have performed two studies, one is in the jacket jack 103 00:10:31,740 --> 00:10:38,880 inclusive data production using the CMS. In the second one, we have usually the 104 00:10:38,880 --> 00:10:47,760 protons in the proton which were which were measured at the totem Roman pots. So, 105 00:10:48,090 --> 00:10:53,310 since we have to invent samples we have applied even selections for selecting the 106 00:10:53,310 --> 00:10:58,140 digestive and especially, we would like to have the larger repeted separation. That's 107 00:10:58,140 --> 00:11:04,110 why we have applied the second time Some of the first leading chat and subnetting 108 00:11:04,110 --> 00:11:10,830 chat of the aka should be less than zero. For the levy proton selection, we have 109 00:11:10,830 --> 00:11:15,360 required at least one proton should be detected one of these sectors in total 110 00:11:15,360 --> 00:11:23,490 Roman pots and and the differential cross sections the differential cross sections 111 00:11:23,820 --> 00:11:30,720 the fractional momentum both are required if and psi and T are applied to be within 112 00:11:30,720 --> 00:11:31,920 this region. 113 00:11:33,990 --> 00:11:39,270 For the there is a one factor which is a called rapid gap 114 00:11:41,610 --> 00:11:47,130 CSE FC FC which is the actually the ratio of the number of jet capture events to the 115 00:11:47,310 --> 00:11:53,040 number of inclusive dieted events what you can see on the right hand slide, there is 116 00:11:53,040 --> 00:12:01,680 a comparison the FSC is vs to the sub leading jets PT is given out The CMS data 117 00:12:01,710 --> 00:12:09,000 certainty is given with the blue blue markers and compared with the one premise 118 00:12:09,030 --> 00:12:14,370 previous measurement that we have perform at 70 and compared with the other 119 00:12:14,490 --> 00:12:22,320 experiments performed Up to now, so the generally the nice, me Okay, thank you 120 00:12:22,590 --> 00:12:31,860 almost a fraction of jet get job is also shown for the two jets data data 121 00:12:31,860 --> 00:12:37,680 differences. So there's a trend of increasing that 70s also confirmed 122 00:12:37,710 --> 00:12:43,380 confirmed at 13 TV. This measurement extends the range previously explored 123 00:12:43,590 --> 00:12:50,880 towards large values of data. And also I would like to show you the CMS data 124 00:12:50,880 --> 00:12:57,690 results for this jet capture events with the leading proton so CMS dot m results 125 00:12:57,720 --> 00:13:02,700 when you compare the CMS is also Just that the relative abundance of digest events 126 00:13:02,700 --> 00:13:08,340 with a central gap is larger in events with a leading proton. So this is a kind 127 00:13:08,340 --> 00:13:09,360 of constraints 128 00:13:10,620 --> 00:13:14,580 on the theoretical treatment of rapids the gap survival probability. 129 00:13:15,929 --> 00:13:21,119 We have recently just signed on another in a publication single practice project 130 00:13:21,119 --> 00:13:28,379 production at a TV. This is also using the totem data both together with CMS you can 131 00:13:28,379 --> 00:13:34,649 see here, the background coming from the inclusive digests with a fake or a pileup 132 00:13:34,679 --> 00:13:39,959 in the single arm of the wrong parts. So, we have applied some cuts the psi and 133 00:13:40,409 --> 00:13:46,319 taught them and the costs icms and you can see the CMS minus sign to them with 134 00:13:46,319 --> 00:13:52,829 respect to the events. So, this is the results that we have obtained the 135 00:13:52,829 --> 00:13:57,689 differential cross sections are shown here as a function of the T on the left hand 136 00:13:57,689 --> 00:14:02,609 side and on the right hand side as a functional difference. See, Paul MC 137 00:14:02,699 --> 00:14:08,069 actually corrected with two for two ends of suppression of defective cross section. 138 00:14:08,489 --> 00:14:15,779 This is the gap survival probability PTA tveit dynamic gap model accounts for the 139 00:14:15,779 --> 00:14:21,509 MPI and describes the data reasonably well without applying any further corrections. 140 00:14:22,199 --> 00:14:28,229 And this is the comparison that we have performed for the ratio the single 141 00:14:28,229 --> 00:14:32,249 diffractive and the non refractive target for all sections from different models as 142 00:14:32,249 --> 00:14:37,799 you can see on the left hand side and on the right hand side the CMS measurement is 143 00:14:37,859 --> 00:14:44,579 a ratio as a function of momentum sorry part of momentum fraction of x is shown 144 00:14:44,579 --> 00:14:50,819 here. So, similarly practice to elusive cross section ratio decreases with the 145 00:14:50,849 --> 00:14:56,549 center of mass energies as observed in telecom measurements. 146 00:14:58,350 --> 00:15:03,540 So, this brings me to number summary, I have you you an overview of some 147 00:15:03,540 --> 00:15:09,450 representative soft QC here refractive measurements, and Elysee has provided 148 00:15:09,540 --> 00:15:15,270 access to large face to face as well as a new energy scape for understanding of 149 00:15:15,270 --> 00:15:22,290 various aspects of the QC. As a CMS, we have a rich physics program to test for 150 00:15:22,290 --> 00:15:26,670 acoustic models and to improve our picture of hydronic collisions as well as its 151 00:15:26,670 --> 00:15:31,800 universality. So I have also shown you the very forward rapid region energy 152 00:15:31,800 --> 00:15:36,180 measurements, which indicates some interesting potential to further improve 153 00:15:36,180 --> 00:15:40,560 the underlying investment model predictions as well as tuning the Monte 154 00:15:40,560 --> 00:15:46,050 Carlo samples. So there are still more measurements and at fortune ongoing and we 155 00:15:46,050 --> 00:15:52,230 are patient of the NSE around two. And please stay tuned and I would like to 156 00:15:52,800 --> 00:15:54,270 thank you for your attention. 157 00:15:56,640 --> 00:15:57,810 Thank you, Denise. 158 00:16:01,350 --> 00:16:02,610 time for questions. 159 00:16:15,929 --> 00:16:24,779 Hello, I would have a question on the WWE W. DPS measurement. On the last slide 160 00:16:24,779 --> 00:16:29,339 you've shown in your form for this study. I don't know what these 161 00:16:30,179 --> 00:16:31,739 go there first. 162 00:16:33,480 --> 00:16:34,530 This one sorry. 163 00:16:37,470 --> 00:16:40,140 This one, you mean, this is the Yes, exactly. 164 00:16:40,530 --> 00:16:47,760 So do I understand correctly that in the bottom left plot, the bottom result that 165 00:16:47,760 --> 00:16:55,230 you showed there includes both same same sign and the opposite sign? Yes, yes. 166 00:16:55,260 --> 00:17:00,750 Right. But then isn't there on a model dependent extrapolation That is being 167 00:17:00,750 --> 00:17:04,800 involved here because the actual measurement, I think you perform it for 168 00:17:04,800 --> 00:17:05,520 same sign. 169 00:17:06,809 --> 00:17:11,429 Yes, that's right. The the actual measurement was performed for the same 170 00:17:11,429 --> 00:17:14,669 sign. But here, we have also checked the leptons 171 00:17:16,049 --> 00:17:22,019 charge configurations in here. And as you can see, that's the that's the our 172 00:17:22,019 --> 00:17:26,669 measurements are on the bottom. This is the our final results for the DPS cross 173 00:17:26,669 --> 00:17:27,269 section. 174 00:17:28,019 --> 00:17:29,789 And the others are 175 00:17:30,900 --> 00:17:36,330 obtained by using the PCA and factorization approach. 176 00:17:37,680 --> 00:17:44,100 Right, but my point was just that I mean, I think when you extrapolate from, from 177 00:17:44,100 --> 00:17:48,690 same sign from the measurement to the bottom result there, which include the 178 00:17:48,690 --> 00:17:52,140 opposite sign, I think you have model dependence in this extrapolation. 179 00:17:52,920 --> 00:17:55,650 Yes, that's right. Okay. 180 00:18:05,640 --> 00:18:06,990 Any more questions?