Search for heavy neutral lepton production in K+ decays

被引：74

作者：

Gil, E. Cortina ^{[1
]}

Minucci, E. ^{[1
]}

Padolski, S. ^{[1
,37
]}

Petrov, P. ^{[1
]}

Velghe, B. ^{[1
,3
]}

Georgiev, G. ^{[2
,12
]}

Kozhuharov, V. ^{[2
,12
]}

Litov, L. ^{[2
]}

Numao, T. ^{[3
]}

Bryman, D. ^{[4
]}

Fu, J. ^{[38
]}

Husek, T. ^{[5
,39
]}

Kampf, K. ^{[5
]}

Zamkovsky, M. ^{[5
]}

Aliberti, R. ^{[6
,7
]}

Khoriauli, G. ^{[6
,7
]}

Kunze, J. ^{[6
,7
]}

Lomidze, D. ^{[6
,7
,40
]}

Marchevski, R. ^{[6
,7
]}

Peruzzo, L. ^{[6
,7
]}

Vormstein, M. ^{[6
,7
]}

Wanke, R. ^{[6
,7
]}

Dalpiaz, P. ^{[8
,9
]}

Fiorini, M. ^{[8
,9
]}

Gamberini, E. ^{[8
,9
,31
]}

Neri, I. ^{[8
,9
]}

Norton, A. ^{[8
,9
]}

Petrucci, F. ^{[8
,9
]}

Wahl, H. ^{[8
,9
]}

Ramusino, A. Cotta ^{[9
]}

Gianoli, A. ^{[9
]}

Iacopini, E. ^{[10
,11
]}

Latino, G. ^{[10
,11
]}

Lenti, M. ^{[10
,11
]}

Bizzeti, A. ^{[11
,41
]}

Bucci, F. ^{[11
]}

Volpe, R. ^{[11
]}

Antonelli, A. ^{[12
]}

Gonnella, F. ^{[12
,39
]}

Lamanna, G. ^{[12
,17
,18
]}

Lanfranchi, G. ^{[12
]}

Mannocchi, G. ^{[12
]}

Martellotti, S. ^{[12
]}

Moulson, M. ^{[12
]}

Raggi, M. ^{[12
,20
]}

Spadaro, T. ^{[12
]}

Ambrosino, F. ^{[13
,14
]}

Capussela, T. ^{[13
,14
]}

Corvino, M. ^{[13
,14
]}

Di Filippo, D. ^{[13
,14
]}

机构：

[1] Catholic Univ Louvain, B-1348 Louvain, Belgium

[2] Univ Sofia, Fac Phys, Sofia, Bulgaria

[3] TRIUMF, Vancouver, BC, Canada

[4] Univ British Columbia, Vancouver, BC, Canada

[5] Charles Univ Prague, Prague, Czech Republic

[6] Johannes Gutenberg Univ Mainz, Inst Phys, Mainz, Germany

[7] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, Mainz, Germany

[8] Univ Ferrara, Dipartimento Fis & Sci Terra, Ferrara, Italy

[9] INFN, Sez Ferrara, Ferrara, Italy

[10] Univ Florence, Dipartimento Fis & Astron, Sesto Fiorentino, Italy

[11] INFN, Sez Firenze, Sesto Fiorentino, Italy

[12] Lab Nazl Frascati, I-00044 Frascati, Italy

[13] Dipartimento Fis Ettore Pancini, Naples, Italy

[14] INFN, Sez Napoli, Naples, Italy

[15] Univ Perugia, Dipartimento Fis & Geol, Perugia, Italy

[16] INFN, Sez Perugia, Perugia, Italy

[17] Univ Pisa, Dipartimento Fis, Pisa, Italy

[18] INFN, Sez Pisa, Pisa, Italy

[19] Scuola Normale Super Pisa, Pisa, Italy

[20] Sapienza Univ Roma, Dipartimento Fis, Rome, Italy

[21] INFN, Sez Roma I, Rome, Italy

[22] INFN, Sez Roma Tor Vergata, Rome, Italy

[23] Univ Turin, Dipartimento Fis, Turin, Italy

[24] INFN, Sez Torino, Turin, Italy

[25] Univ Autonoma San Luis Potosi, Inst Fis, San Luis Potosi, Mexico

[26] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[27] Joint Inst Nucl Res, Dubna, Russia

[28] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[29] State Res Ctr Russian Federat, Inst High Energy Phys, Protvino, Russia

[30] Comenius Univ, Fac Math Phys & Informat, Bratislava, Slovakia

[31] CERN, European Org Nucl Res, Geneva, Switzerland

[32] Univ Birmingham, Birmingham, W Midlands, England

[33] Univ Bristol, Bristol, Avon, England

[34] Univ Glasgow, Glasgow, Lanark, Scotland

[35] Univ Liverpool, Liverpool, Merseyside, England

[36] George Mason Univ, Fairfax, VA 22030 USA

[37] Brookhaven Natl Lab, Upton, NY 11973 USA

[38] UCLA, Phys & Biol Med, Los Angeles, CA 90095 USA

[39] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[40] Univ Hamburg, D-20146 Hamburg, Germany

[41] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41125 Modena, Italy

[42] Univ Roma Tor Vergata, Dept Ind Engn, I-00173 Rome, Italy

[43] Univ Roma Tor Vergata, Dept Elect Engn, I-00173 Rome, Italy

[44] Univ Piemonte Orientale, I-13100 Vercelli, Italy

[45] INRNE BAS, BG-1784 Sofia, Bulgaria

[46] Natl Res Nucl Univ MEPhi, Moscow 115409, Russia

[47] Moscow Inst Phys & Technol, Moscow, Russia

[48] Imperial Coll London, Phys Dept, London SW7 2BW, England

[49] Univ Lancaster, Phys Dept, Lancaster LA1 4YW, England

[50] Univ Roma La Sapienza, Dipartimento Psicol, I-00185 Rome, Italy

来源：

PHYSICS LETTERS B | 2018年 / 778卷

基金：

欧洲研究理事会; 加拿大自然科学与工程研究理事会; 英国科学技术设施理事会; 美国国家科学基金会;

关键词：

BOUNDS; MASSES; TESTS;

D O I：

10.1016/j.physletb.2018.01.031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for heavy neutral lepton production in K+ decays using a data sample collected with a minimum bias trigger by the NA62 experiment at CERN in 2015 is reported. Upper limits at the 10(-7)to 10(-6) level are established on the elements of the extended neutrino mixing matrix vertical bar U-e4 vertical bar(2)and vertical bar U-mu 4 vertical bar(2)for heavy neutral lepton mass in the ranges 170-448MeV c(2) and 250-373MeV/c(2), respectively. This improves on the previous limits from HNL production searches over the whole mass range considered for vertical bar U-e4 vertical bar(2), and above 300MeV/c(2) for vertical bar U-mu 4 vertical bar(2). (C) 2018 The Author(s). Published by Elsevier B.V.

引用

页码：137 / 145

页数：9

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