Search for heavy Majorana neutrinos in e±e±+ jets and e± μ±+jetseventsinproton-protoncollisionsat √s=8TeV

被引：0

作者：

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Asilar, E. ^{[2
]}

Bergauer, T. ^{[2
]}

Brandstetter, J. ^{[2
]}

Brondolin, E. ^{[2
]}

Dragicevic, M. ^{[2
]}

Eroe, J. ^{[2
]}

Flechl, M. ^{[2
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
]}

Ghete, V. M. ^{[2
]}

Hartl, C. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
]}

Koenig, A. ^{[2
]}

Krammer, M. ^{[2
,191
]}

Kraetschmer, I. ^{[2
]}

Liko, D. ^{[2
]}

Matsushita, T. ^{[2
]}

Mikulec, I. ^{[2
]}

Rabady, D. ^{[2
]}

Rad, N. ^{[2
]}

Rahbaran, B. ^{[2
]}

Rohringer, H. ^{[2
]}

Schieck, J. ^{[2
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Treberer-Treberspurg, W. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Alderweireldt, S. ^{[4
]}

Cornelis, T. ^{[4
]}

De Wolf, E. A. ^{[4
]}

Janssen, X. ^{[4
]}

Knutsson, A. ^{[4
]}

Lauwers, J. ^{[4
]}

Luyckx, S. ^{[4
]}

De Klundert, M. Van ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Remortel, N. ^{[4
]}

Van Spilbeeck, A. ^{[4
]}

Abu Zeid, S. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys OeAW, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, Ghent, Belgium

[8] Catholic Univ Louvain, Louvain, Belgium

[9] Univ Mons, Mons, Belgium

[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Sao Paulo, Brazil

[13] Univ Fed ABC, Sao Paulo, Brazil

[14] Inst Nucl Energy Res, Sofia, Bulgaria

[15] Univ Sofia, Sofia, Bulgaria

[16] Beihang Univ, Beijing, Peoples R China

[17] Inst High Energy Phys, Beijing, Peoples R China

[18] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China

[19] Univ Los Andes, Bogota, Colombia

[20] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia

[21] Univ Split, Fac Sci, Split, Croatia

[22] Inst Rudjer Boskov, Zagreb, Croatia

[23] Univ Cyprus, Nicosia, Cyprus

[24] Charles Univ Prague, Prague, Czech Republic

[25] Acad Sci Res & Technol, Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt

[26] NICPB, Tallinn, Estonia

[27] Univ Helsinki, Dept Phys, Helsinki, Finland

[28] Helsinki Inst Phys, Helsinki, Finland

[29] Lappeenranta Univ Technol, Lappeenranta, Finland

[30] CEA, DSM, IRFU, Gif Sur Yvette, France

[31] IN2P3 CNRS, Ecole Polytech, Lab Leprince Ringuet, Palaiseau, France

[32] Univ Haute Alsace Mulhouse, Univ Strasbourg, CNRS IN2P3, Inst Pluridisciplinaire Hubert Curien, Strasbourg, France

[33] CNRS IN2P3, Ctr Calcul, Inst Natl Phys Nucl & Phys Particules, Villeurbanne, France

[34] Univ Claude Bernard Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, Villeurbanne, France

[35] Georgian Tech Univ, Tbilisi, Georgia

[36] Tbilisi State Univ, Tbilisi, Georgia

[37] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[38] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[39] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany

[40] DESY, Hamburg, Germany

[41] Univ Hamburg, Hamburg, Germany

[42] Inst Expt Kernphys, Karlsruhe, Germany

[43] NCSR Demokritos, INPP, Aghia Paraskevi, Greece

[44] Natl & Kapodistrian Univ Athens, Athens, Greece

[45] Univ Ioannina, Ioannina, Greece

[46] Wigner Res Ctr Phys, Budapest, Hungary

[47] Inst Nucl Res ATOMKI, Debrecen, Hungary

[48] Univ Debrecen, Debrecen, Hungary

[49] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India

[50] Panjab Univ, Chandigarh, India

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2016年 / 04期

基金：

美国国家科学基金会; 欧洲研究理事会; 芬兰科学院; 巴西圣保罗研究基金会;

关键词：

Beyond Standard Model; Hadron-Hadron scattering (experiments); MASSES; VIOLATION; LEPTONS; MIXINGS; MODELS;

D O I：

10.1007/JHEP04(2016)169

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

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 fb(-1) of data collected during 2012 in proton-proton collisions at a centre-of-mass energy of 8TeV. 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 6.6 x 10(-5) -0.47 for |VeNV*(mu N)|(2) / (|V-eN|(2) + |V-mu N|(2)), where V-lN is the mixing element describing the mixing of the heavy neutrino with the SM neutrino of favour l. These limits are the most restrictive direct limits for heavy Majorana neutrino masses above 200 GeV.

引用

页数：43

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