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| 題名: | Search for decays of stopped long-lived particles produced in proton–proton collisions at √s= 8, TeV |
| 作者: | 余欣珊;Ghete, V. M.;Van Haevermaet, H.;Seva, T.;Wang, J.;Strobbe, N.;Pin, A.;Fonseca De Souza, S.;Mao, Y.;Finger, M.;Elgammal, S.;Chasserat, J.;Sammet, J.;Ata, M.;Klingebiel, D.;Knutzen, S.;Sonnenschein, L.;Hoehle, F.;Flucke, G.;Lipka, K.;Nayak, A.;Görner, M.;Kogler, R.;Steinbrück, G.;Frensch, F.;Kuznetsova, E.;Geralis, T.;Stiliaris, E.;Beni, N.;Choudhary, B. C.;Mukherjee, S.;Ganguly, S.;Brigliadori, L.;Cappello, G.;Malvezzi, S.;Martelli, A.;Paganoni, M.;Pedrini, D.;Passaseo, M.;Pazzini, J.;Fedi, G.;Argiro, S.;Song, S.;Olszewski, M.;Varela, J.;Afanasiev, S.;Murzin, V.;Krasnikov, N.;Epshteyn, V.;Kirakosyan, M.;Dudko, L.;Kalinin, A.;Flix, J.;Missiroli, M.;Cabrillo, I. J.;Ruiz-Jimeno, A.;Vila, I.;Benhabib, L.;Bondu, O.;Cerminara, G.;Elliott-Peisert, A.;Glege, F.;Guthoff, M.;Hammer, J.;Innocente, V.;Lourenço, C.;Donegà, M.;Nessi-Tedaldi, F.;Cerci, S.;Olaiya, E.;Kenzie, M.;Magnan, A.-M.;Hauser, J.;Valuev, V.;Heilman, J.;Holzner, A.;Yagil, A.;Iiyama, Y.;Gottschalk, E.;Gray, L.;Merkel, P.;Vidal, R.;Avery, P.;Baarmand, M. M.;Maravin, Y.;Rusack, R.;Bose, S.;Mucia, N.;Pearson, T.;Ramirez Vargas, J. E.;Wang, F.;Geurts, F. J. M.;de Barbaro, P.;Eshaq, Y.;Contreras-Campana, E.;Lath, A.;Eusebi, R.;Cox, B.;Cepeda, M.;Perry, T. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | Astronomy;Astrophysics and Cosmology;Elementary Particles;Hadrons;Heavy Ions;Measurement Science and Instrumentation;Nuclear Energy;Nuclear Physics;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Regular Article - Experimental Physics;String Theory |
| 日期: | 2015-04-01 |
| 上傳時間: | 2026-04-23 13:04:09 (UTC+8) |
| 出版者: | Springer New York;Berlin/Heidelberg: Springer Berlin Heidelberg |
| 摘要: | 摘要： A search has been performed for long-lived particles that could have come to rest within the CMS detector, using the time intervals between LHC beam crossings. The existence of such particles could be deduced from observation of their decays via energy deposits in the CMS calorimeter appearing at times that are well separated from any proton–proton collisions. Using a data set corresponding to an integrated luminosity of 18.6 fb -1 of 8 TeV proton–proton collisions, and a search interval corresponding to 281 h of trigger livetime, 10 events are observed, with a background prediction of 13 . 2 - 2.5 + 3.6 events. Limits are presented at 95 % confidence level on gluino and top squark production, for over 13 orders of magnitude in the mean proper lifetime of the stopped particle. Assuming a cloud model of R-hadron interactions, a gluino with mass ≲ 1000 GeV and a top squark with mass ≲ 525 GeV are excluded, for lifetimes between 1 μ s and 1000 s . These results are the most stringent constraints on stopped particles to date.
其他題名： Eur. Phys. J. C
出版者： Berlin/Heidelberg: Springer Berlin Heidelberg
出版日期： 2015-04-11
出處： The European physical journal. C, Particles and fields, 2015-04, Vol.75 (4)
資源來源： Publicly Available Content Database
版權： CERN for the benefit of the CMS collaboration 2015
識別號： ISSN: 1434-6044
識別號： EISSN: 1434-6052
識別號： DOI: 10.1140/epjc/s10052-015-3367-z |
| 顯示於類別: | [物理學系] 期刊論文
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