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| 題名: | Search for heavy Majorana neutrinos in μ±μ± + jets events in proton-proton collisions at s=8 TeV |
| 作者: | 余欣珊;Khachatryan, V.;Besancon, M.;Couderc, F.;Dejardin, M.;Denegri, D.;Fabbro, B.;Faure, J.L.;Favaro, C.;Ferri, F.;Ganjour, S.;Givernaud, A.;Gras, P.;Monchenault, G. Hamel De;Jarry, P.;Locci, E.;Malcles, J.;Rander, J.;Rosowsky, A.;Titov, M.;Baffioni, S.;Beaudette, F.;Busson, P.;Chapon, E.;Charlot, C.;Dahms, T.;Dobrzynski, L.;Filipovic, N.;Florent, A.;Granier de Cassagnac, R.;Mastrolorenzo, L.;Miné, P.;Naranjo, I.N.;Nguyen, M.;Ochando, C.;Ortona, G.;Paganini, P.;Regnard, S.;Salerno, R.;Sauvan, J.B.;Sirois, Y.;Veelken, C.;Yilmaz, Y.;Zabi, A.;Agram, J.-L.;Andrea, J.;Aubin, A.;Bloch, D.;Brom, J.-M.;Chabert, E.C.;Collard, C.;Conte, E.;Fontaine, J.-C.;Gele, D.;Goerlach, U.;Goetzmann, C.;Bihan, A.-C. Le;Skovpen, K.;Hove, P. Van;Gadrat, S.;Beauceron, S.;Beaupere, N.;Bernet, C.;Boudoul, G.;Bouvier, E.;Brochet, S.;Montoya, C.A. Carrillo;Chasserat, J.;Chierici, R.;Contardo, D.;Courbon, B.;Depasse, P.;Mamouni, H. El;Fan, J.;Fay, J.;Gascon, S.;Gouzevitch, M.;Ille, B.;Kurca, T.;Lethuillier, M.;Mirabito, L.;Pequegnot, A.L.;Perries, S.;Alvarez, J.D. Ruiz;Sabes, D.;Sgandurra, L.;Sordini, V.;Donckt, M. Vander;Verdier, P.;Viret, S.;Xiao, H. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | High Energy Physics - Experiment;Physics |
| 日期: | 2015-07-02 |
| 上傳時間: | 2026-04-23 13:14:12 (UTC+8) |
| 出版者: | Elsevier |
| 摘要: | 摘要： A search is performed for heavy Majorana neutrinos (N) using an event signature defined by two muons of the same charge and two jets (mu+/- mu+/- jj). The data correspond to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS detector at the CERN LHC. No excess of events is observed beyond the expected standard model background and upper limits are set on abs(V[mu,N])^2 as a function of Majorana neutrino mass m[N] for masses in the range of 40-500 GeV, where V[mu,N] is the mixing element of the heavy neutrino with the standard model muon neutrino. The limits obtained are abs(V[mu,N])^2 < 0.00470 for m[N] = 90 GeV, abs(V[mu,N])^2 < 0.0123 for m[N] = 200 GeV, and abs(V[mu,N])^2 < 0.583 for m[N] = 500 GeV. These results extend considerably the regions excluded by previous direct searches.
出版者： Elsevier
出版日期： 2015
出處： Physics letters. B, 2015, Vol.748, p.144-166
資源來源： Elsevier ScienceDirect Journals Complete
版權： CC0 1.0 - Universal
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2015.06.070 |
| 顯示於類別: | [物理學系] 期刊論文
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