Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/107502

Title:	Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s=8 TeV
Authors:	林宗泰;Sirunyan, A.M.;Waltenberger, W.;Wulz, C.-E.;De Wolf, E.A.;Beernaert, K.;Prado Da Silva, W.L.;Couderc, F.;Faure, J.L.;Jarry, P.;Chasserat, J.;Sabes, D.;Klein, K.;Schael, S.;Heidemann, C.;Padeken, K.;Eckerlin, G.;Lutz, B.;Saxena, P.;Wissing, C.;Höing, R.S.;Böser, C.;Katkov, I.;Nürnberg, A.;Wagner-Kuhr, J.;Psallidas, A.;Topsis-Giotis, I.;Stiliaris, E.;Aslanoglou, X.;Hidas, P.;Horvath, D.;Ujvari, B.;Kaur, M.;Banerjee, S.;Kumar, V.;Aziz, T.;Ghosh, S.;Calabria, C.;Singh, G.;Gori, V.;Sguazzoni, G.;Tropiano, A.;Bianco, S.;Ghezzi, A.;Govoni, P.;Tosi, M.;Vitulo, P.;Fanò, L.;Giassi, A.;Serban, A.T.;Santanastasio, F.;Argiro, S.;Demaria, N.;Potenza, A.;Chang, S.;Lopez-Fernandez, R.;Ahmad, A.;Boimska, B.;Lanev, A.;Matveev, V.;Dermenev, A.;Albajar, C.;Siegrist, P.;Eller, P.;Hits, D.;Nef, P.;Verzetti, M.;Kao, K.Y.;Cerci, S.;Bilin, B.;Buchmuller, O.;Cripps, N.;Reid, I.D.;St. John, J.;Cutts, D.;Kukartsev, G.;Breedon, R.;Malberti, M.;Barge, D.;Rogan, C.;Iiyama, Y.;Weng, Y.;Wittich, P.;Abdullin, S.;Fisk, I.;Vidal, R.;De Gruttola, M.;Silkworth, C.;Tiras, E.;Bruner, C.;Shrestha, S.;Zhukova, V.;Hahn, K.A.;Kubik, A.;Pollack, B.;Bylsma, B.;Mooney, M.;Xie, W.;Zabel, J.;Eusebi, R.;Perloff, A.
Contributors:	理學院物理學系
Keywords:	CMS;Higgs;PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;Stop;SUSY
Date:	2014-09-07
Issue Date:	2026-04-23 14:15:44 (UTC+8)
Publisher:	Netherlands: Elsevier B.V
Abstract:	摘要： A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at s=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5 fb−1. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate t˜2 decaying to a lighter top-squark mass eigenstate t˜1 via either t˜2→Ht˜1 or t˜2→Zt˜1, followed in both cases by t˜1→tχ˜10, where χ˜10 is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between the t˜1 and χ˜10 states is approximately equal to the top-quark mass (mt˜1−mχ˜10≃mt), which is not probed by searches for direct t˜1 squark pair production. The analysis excludes top squarks with masses mt˜2<575 GeV and mt˜1<400 GeV at a 95% confidence level. 出版者： Netherlands: Elsevier B.V 出版日期： 2014-09-07 出處： Physics letters. B, 2014-09, Vol.736 (C), p.371-397 資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings 版權： 2014 The Authors 識別號： ISSN: 0370-2693 識別號： EISSN: 1873-2445 識別號： DOI: 10.1016/j.physletb.2014.07.053
Appears in Collections:	[Department of Physics] journal & Dissertation

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