Search for heavy Majorana neutrinos in e±e±+ jets and e±µ±+ jets events in proton-proton collisions at √s = 8 TeV

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/106217

Title:	Search for heavy Majorana neutrinos in e±e±+ jets and e±µ±+ jets events in proton-proton collisions at √s = 8 TeV
Authors:	林宗泰;Khachatryan, V.;Besançon, 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.;Machet, M.;Malcles, J.;Rander, J.;Rosowsky, A.;Titov, M.;Zghiche, A.;Abdulsalam, A.;Antropov, I.;Baffioni, S.;Beaudette, F.;Busson, P.;Cadamuro, L.;Chapon, E.;Charlot, C.;Davignon, O.;Filipovic, N.;Granier de Cassagnac, R.;Jo, M.;Lisniak, S.;Mine, P.;Naranjo, I.N.;Nguyen, M.;Ochando, C.;Ortona, G.;Paganini, P.;Pigard, P.;Regnard, S.;Salerno, R.;Sirois, Y.;Strebler, T.;Yilmaz, Y.;Zabi, A.;Agram, J.-L.;Andrea, J.;Aubin, A.;Bloch, D.;Brom, J.-M.;Buttignol, M.;Chabert, E.C.;Chanon, N.;Collard, C.;Conte, E.;Coubez, X.;Fontaine, J.-C.;Gele, D.;Goerlach, U.;Goetzmann, C.;Bihan, A.-C. Le;Merlin, J.A.;Skovpen, K.;Hove, P. Van;Gadrat, S.;Beauceron, S.;Bernet, C.;Boudoul, G.;Bouvier, E.;Montoya, C.A. Carrillo;Chierici, R.;Contardo, D.;Courbon, B.;Depasse, P.;Mamouni, H. El;Fan, J.;Fay, J.;Gascon, S.;Gouzevitch, M.;Ille, B.;Lagarde, Fabienne;Laktineh, I.B.;Lethuillier, M.;Mirabito, L.;Pequegnot, A.L.;Perries, S.;Popov, A.;Alvarez, J.D. Ruiz;Sabes, D.;Sordini, V.;Donckt, M. Vander;Verdier, P.;Viret, S.
Contributors:	理學院物理學系
Keywords:	High Energy Physics - Experiment;Physics
Date:	2016-04-27
Issue Date:	2026-04-23 13:13:55 (UTC+8)
Publisher:	Springer
Abstract:	摘要： A search is performed for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. A signature of two jets and either two same sign electrons or a same sign electron-muon pair is searched for using 19.7 inverse-femtobarns of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data are found to be consistent with the expected standard model (SM) background and, in the context of a Type-1 seesaw mechanism, upper limits are set on the cross section times branching fraction for production of heavy Majorana neutrinos in the mass range between 40 and 500 GeV. The results are additionally interpreted as limits on the mixing between the heavy Majorana neutrinos and the SM neutrinos. In the mass range considered, the upper limits range between 0.00015 - 0.72 for \|V[eN]\|² and 6.6E-5 - 0.47 for \|V[eN]V*[muN]\|² / ( \|V[eN]\|² + \|V[muN]\|² ), where V[lN] is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of flavour l. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV. 出版者： Springer 出版日期： 2016 出處： The journal of high energy physics, 2016, Vol.4 資源來源： Publicly Available Content Database 版權： CC0 1.0 - Universal 識別號： ISSN: 1126-6708 識別號： EISSN: 1029-8479 識別號： DOI: 10.1007/JHEP04(2016)169
Appears in Collections:	[Department of Physics] journal & Dissertation

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