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| 題名: | Search for R-parity violating decays of a top squark in proton–proton collisions at √s=8 TeV |
| 作者: | 林宗泰;Sirunyan, A.M.;Hartl, C.;Jeitler, M.;Knutsson, A.;Karapostoli, G.;Fagot, A.;Bruno, G.;Giammanco, A.;Mertens, A.;Pin, A.;Santoro, A.;Bernardes, C.A.;Jiang, C.H.;Tao, J.;Mahmoud, M.A.;Tuominen, E.;Jarry, P.;Antropov, I.;Ortona, G.;Agram, J.-L.;Buttignol, M.;Geisler, M.;Garay Garcia, J.;Ntomari, E.;Pitzl, D.;Kovalchuk, N.;Schlieckau, E.;Haitz, D.;Bansal, S.;Kalsi, A.K.;Garg, R.B.;Cuffiani, M.;Giacomelli, P.;Grandi, C.;Marcellini, S.;Tosi, N.;Gelli, S.;Bellan, R.;La Licata, C.;Go, Y.;Kim, Y.;Yoo, H.D.;Lee, J.S.H.;Ahmed, I.;Kazana, M.;Lanev, A.;Azhgirey, I.;Uzunian, A.;Benaglia, A.;Dobson, M.;Fulcher, J.;Martelli, A.;Masetti, L.;Pierini, M.;Tsirou, A.;Dissertori, G.;Mangano, B.;Pata, J.;Salerno, D.;Kuo, C.M.;Suwonjandee, N.;Ozdemir, K.;Harder, K.;Stolp, D.;Olmedo Negrete, M.;Padhi, S.;Dutta, V.;Azzolini, V.;Dittmer, S.;Eggert, N.;Ryd, A.;Albrow, M.;Chlebana, F.;Linacre, J.;Merkel, P.;O'Dell, V.;Pedro, K.;Carnes, A.;Milenovic, P.;Terentyev, N.;Thomas, L.;Clarida, W.;Tiras, E.;Yi, K.;Swartz, M.;Jabeen, S.;Mcginn, C.;Bloom, K.;Siado, J.E.;Odell, N.;Trovato, M.;Brinson, J.;Chen, Z.;Zabel, J.;Arora, S.;Panwalkar, S.;Cowden, C.;Xia, F.;Belknap, D.A.;Dasu, S. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Leptons;Low missing transverse energy;Physics;PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;Supersymmetry |
| 日期: | 2016-09-10 |
| 上傳時間: | 2026-04-23 13:52:40 (UTC+8) |
| 出版者: | Netherlands: Elsevier B.V |
| 摘要: | 摘要： The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton–proton collisions at s=8 TeV, are presented. The search, which focuses on R-parity violating, chargino-mediated decays of the top squark, is performed in final states with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets. The analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb−1 collected with the CMS detector at the LHC in 2012. The data are found to be in agreement with the standard model expectation, and upper limits are placed on the top squark pair production cross section at 95% confidence level. Assuming a 100% branching fraction for the top squark decay chain, t˜→tχ˜1±,χ˜1±→ℓ±+jj, top squark masses less than 890 (1000) GeV for the electron (muon) channel are excluded for the first time in models with a single nonzero R-parity violating coupling λijk′(i,j,k≤2), where i,j,k correspond to the three generations.
出版者： Netherlands: Elsevier B.V
出版日期： 2016-09-10
出處： Physics letters. B, 2016-09, Vol.760 (C), p.178-201
資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings
版權： 2016 The Author(s)
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2016.06.039 |
| 顯示於類別: | [物理學系] 期刊論文
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