Search for long-lived heavy neutral leptons in proton-proton collision events with a lepton-jet pair associated with a secondary vertex at √s=13 TeV

被引：0

作者：

Hayrapetyan, A. ^{[1
]}

Tumasyan, A. ^{[207
]}

Adam, W. ^{[2
]}

Andrejkovic, J. W. ^{[2
]}

Bergauer, T. ^{[2
]}

Chatterjee, S. ^{[2
,63
]}

Damanakis, K. ^{[2
]}

Dragicevic, M. ^{[2
]}

Hussain, P. S. ^{[2
]}

Jeitler, M. ^{[2
,208
]}

Krammer, N. ^{[2
]}

Li, A. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Schieck, J. ^{[2
,208
]}

Schoefbeck, R. ^{[2
]}

Schwarz, D. ^{[2
]}

Sonawane, M. ^{[2
]}

Templ, S. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,208
]}

Janssen, T. ^{[3
]}

Van Laer, T. ^{[3
]}

Van Mechelen, P.

Breugelmans, N. ^{[4
]}

D'Hondt, J. ^{[4
]}

Dansana, S. ^{[4
]}

De Moor, A. ^{[4
]}

Delcourt, M. ^{[4
]}

Heyen, F. ^{[4
]}

Lowette, S. ^{[4
]}

Makarenko, I. ^{[4
]}

Muller, D. ^{[4
]}

Tavernier, S. ^{[4
]}

Tytgat, M. ^{[4
,6
]}

Van Onsem, G. P. ^{[4
]}

Van Putte, S. ^{[4
]}

Vannerom, D. ^{[4
]}

Bilin, B. ^{[5
]}

Clerbaux, B. ^{[5
]}

Das, A. K. ^{[5
]}

De Lentdecker, G. ^{[5
]}

Evard, H. ^{[5
]}

Favart, L. ^{[5
]}

Gianneios, P. ^{[5
]}

Jaramillo, J. ^{[5
]}

Khalilzadeh, A. ^{[5
]}

Khan, F. A. ^{[5
]}

Lee, K. ^{[5
,109
]}

Mahdavikhorrami, M. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys, Vienna, Austria

[3] Univ Antwerp, Antwerp, Belgium

[4] Vrije Univ Brussel, Brussels, Belgium

[5] Univ Libre Bruxelles, Brussels, Belgium

[6] Univ Ghent, Ghent, Belgium

[7] Catholic Univ Louvain, Louvain La Neuve, Belgium

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

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

[10] Univ Fed ABC, Univ Estadual Paulista, Sao Paulo, Brazil

[11] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria

[12] Univ Sofia, Sofia, Bulgaria

[13] Univ Tarapaca, Inst Alta Invest, Casilla 7 D, Arica, Chile

[14] Beihang Univ, Beijing, Peoples R China

[15] Tsinghua Univ, Dept Phys, Beijing, Peoples R China

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

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

[18] South China Normal Univ, Guangdong Prov Key Lab Nucl Sci & Guangdong Hong, Guangzhou, Peoples R China

[19] Sun Yat Sen Univ, Guangzhou, Peoples R China

[20] Univ Sci & Technol China, Hefei, Peoples R China

[21] Nanjing Normal Univ, Nanjing, Peoples R China

[22] Fudan Univ, Inst Modern Phys, Shanghai, Peoples R China

[23] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai, Peoples R China

[24] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China

[25] Univ Los Andes, Bogota, Colombia

[26] Univ Antioquia, Medellin, Colombia

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

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

[29] Inst Rudjer Boskov, Zagreb, Croatia

[30] Univ Cyprus, Nicosia, Cyprus

[31] Charles Univ Prague, Prague, Czech Republic

[32] Univ San Francisco Quito, Quito, Ecuador

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

[34] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt

[35] NICPB, Tallinn, Estonia

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

[37] Helsinki Inst Phys, Helsinki, Finland

[38] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland

[39] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France

[40] Inst Polytech Paris, Ecole Polytech, IN2P3, Lab Leprince Ringuet,CNRS, Palaiseau, France

[41] Univ Strasbourg, IPHC, CNRS, UMR 7178, Strasbourg, France

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

[43] Inst Phys 2 Infinis Lyon IP2I, Villeurbanne, France

[44] Georgian Tech Univ, Tbilisi, Georgia

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

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

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

[48] DESY, Hamburg, Germany

[49] Univ Hamburg, Hamburg, Germany

[50] Karlsruher Inst Technol, Karlsruhe, Germany

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2025年 / 02期

基金：

欧洲研究理事会; 美国国家科学基金会; 芬兰科学院; 欧盟地平线“2020”; 巴西圣保罗研究基金会;

关键词：

Beyond Standard Model; Hadron-Hadron Scattering; NEUTRINOS; DECAYS; MASS;

D O I：

10.1007/JHEP02(2025)036

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 for long-lived heavy neutral leptons (HNLs) using proton-proton collision data corresponding to an integrated luminosity of 138 fb(-1) collected at root s = 13TeV with the CMS detector at the CERN LHC is presented. Events are selected with a charged lepton originating from the primary vertex associated with the proton-proton interaction, as well as a second charged lepton and a hadronic jet associated with a secondary vertex that corresponds to the semileptonic decay of a long-lived HNL. No excess of events above the standard model expectation is observed. Exclusion limits at 95% confidence level are evaluated for HNLs that mix with electron and/or muon neutrinos. Limits are presented in the mass range of 1-16.5 GeV, with excluded square mixing parameter values reaching as low as 2 x 10(-7). For masses above 11 GeV, the presented limits exceed all previous results in the semileptonic decay channel, and for some of the considered scenarios are the strongest to date.

引用

页数：57

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