000 03670nlm1a2200433 4500
001 662249
005 20231030041815.0
035 _a(RuTPU)RU\TPU\network\33386
090 _a662249
100 _a20200619a2020 k y0engy50 ba
101 0 _aeng
135 _aarnn ---uucaa
181 0 _ai
182 0 _ab
200 1 _aSearch for disappearing tracks in proton-proton collisions at s=13TeV
_fА. М. Sirunyan, A. R. Tumasyan, W. Adam [et al.]
203 _aText
_celectronic
300 _aTitle screen
320 _a[References.: 50 tit.]
330 _aA search is presented for long-lived charged particles that decay within the volume of the silicon tracker of the CMS experiment. Such particles can produce events with an isolated track that is missing hits in the outermost layers of the silicon tracker, and is also associated with little energy deposited in the calorimeters and no hits in the muon detectors. The search for events with this “disappearing track” signature is performed in a sample of proton-proton collisions recorded by the CMS experiment at the LHC with a center-of-mass energy of 13?TeV, corresponding to an integrated luminosity of recorded in 2017 and 2018. The observation of 48 events is consistent with the estimated background of events. Upper limits are set on chargino production in the context of an anomaly-mediated supersymmetry breaking model for purely wino and higgsino neutralino scenarios. At 95% confidence level, the first constraint is placed on chargino masses in the higgsino case, excluding below 750 (175)?GeV for a lifetime of 3 (0.05) ns. In the wino case, the results of this search are combined with a previous CMS search to produce a result representing the complete LHC data set recorded in 2015–2018, the most stringent constraints to date. At 95% confidence level, chargino masses in the wino case are excluded below 884 (474)?GeV for a lifetime of 3 (0.2) ns.
461 _tPhysics Letters B
463 _tVol. 806
_v[135502, 27 p.]
_d2020
610 1 _aэлектронный ресурс
610 1 _aтруды учёных ТПУ
610 1 _aCMS
610 1 _aphysics
610 1 _adisappearing tracks
701 1 _aSirunyan
_bА. М.
701 1 _aTumasyan
_bA. R.
701 1 _aAdam
_bW.
_gWolfgang
701 1 _aAmbrogi
_bF.
_gFederico
701 1 _aBergauer
_bT.
_gThomas
701 1 _aBabaev
_bA. A.
_cphysicist
_cengineer-issledovatelskogo Polytechnic University, candidate of physical and mathematical Sciences
_f1981-
_gAnton Anatoljevich
_2stltpush
_3(RuTPU)RU\TPU\pers\35154
701 1 _aYuzhakov
_bA. D.
_gAleksandr Dmitrievich
701 1 _aOkhotnikov
_bV. V.
_cphysicist
_cengineer of Tomsk Polytechnic University
_f1992-
_gVitaly Vladimirovich
_2stltpush
_3(RuTPU)RU\TPU\pers\36453
712 0 2 _aНациональный исследовательский Томский политехнический университет
_bИсследовательская школа физики высокоэнергетических процессов
_c(2017- )
_h8118
_2stltpush
_3(RuTPU)RU\TPU\col\23551
712 0 2 _aНациональный исследовательский Томский политехнический университет
_bИнженерная школа новых производственных технологий
_bНаучно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий"
_h7882
_2stltpush
_3(RuTPU)RU\TPU\col\23502
801 2 _aRU
_b63413507
_c20211210
_gRCR
856 4 _uhttps://doi.org/10.1016/j.physletb.2020.135502
942 _cCF