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| 題名: | Search for heavy long-lived charged particles in pp collisions at √s=7 TeV |
| 作者: | 余欣珊;Chatrchyan, S.;Cornelis, T.;Vanelderen, L.;Nuttens, C.;Aldá Júnior, W.L.;Carvalho, W.;Da Costa, E.M.;Fonseca De Souza, S.;Genchev, V.;Asawatangtrakuldee, C.;Morovic, S.;Mousa, J.;Lassila-Perini, K.;Nayak, A.;Kreuzer, P.;Bontenackels, M.;Petrukhin, A.;Raspereza, A.;Spiridonov, A.;Katkov, I.;Nürnberg, A.;Quast, G.;Scheurer, A.;Panagiotou, A.;Evangelou, I.;Kokkas, P.;Trocsanyi, Z.L.;Saini, L.K.;Banerjee, S.;Shukla, P.;Gurtu, A.;Mazumdar, K.;Fahim, A.;De Filippis, N.;Colafranceschi, S.;Fabbricatore, P.;Manzoni, R.A.;Carrillo Montoya, C.A.;Bisello, D.;Tosi, M.;Saha, A.;Kraan, A.;Micheli, F.;Kang, S.;Park, I.C.;Choi, Y.;Sánchez-Hernández, A.;Vazquez Valencia, F.;Doesburg, R.;Bunkowski, K.;Górski, M.;Zalewski, P.;Vischia, P.;Golutvin, I.;Kozlov, G.;Zarubin, A.;Evstyukhin, S.;Ivanov, Y.;Konstantinov, D.;Cabrillo, I.J.;Bianchi, G.;Orsini, L.;Siegrist, P.;Guler, A.M.;Harper, S.;Kennedy, B.W.;Cutajar, M.;Fulcher, J.;Futyan, D.;Hatherell, Z.;Lazic, D.;Segala, M.;Rutherford, B.;Tucker, J.;Ellison, J.;Stuart, D.;Veverka, J.;Ulmer, K.A.;Bhat, P.C.;Lykken, J.;Konigsberg, J.;Gaultney, V.;Cavanaugh, R.;Lacroix, F.;Duru, F.;Lange, D.;Haupt, J.;Cremaldi, L.M.;Eads, M.;Pollack, B.;Durkin, L.S.;Puigh, D.;Gerbaudo, D.;Benedetti, D.;Bortoletto, D.;Svyatkovskiy, A.;Eshaq, Y.;Roe, J.;Harr, R.;Smith, W.H. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Exact sciences and technology;Nuclear physics;Physics;The physics of elementary particles and fields |
| 日期: | 2012-07-18 |
| 上傳時間: | 2026-04-23 13:13:03 (UTC+8) |
| 出版者: | Kidlington: Elsevier B.V |
| 摘要: | 摘要： The result of a search for heavy long-lived charged particles produced in pp collisions at s=7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fb−1. The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting high-ionization and long time-of-flight requirements, is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary long-lived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV/c2. A limit of 928 (626) GeV/c2 is set for a gluino (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV/c2. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV/c2 for hyper-ρ masses of 800, 1200, and 1600 GeV/c2, respectively.
出版者： Kidlington: Elsevier B.V
出版日期： 2012-07-18
出處： Physics letters. B, 2012-07, Vol.713 (4-5), p.408-433
資源來源： Elsevier ScienceDirect Journals Complete
版權： 2012 CERN
版權： 2015 INIST-CNRS
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2012.06.023
識別號： CODEN: PYLBAJ |
| 顯示於類別: | [物理學系] 期刊論文
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