Search for lepton flavour violation at HERA

H1 Collaboration

doi:10.1016/j.physletb.2011.05.023

Search for lepton flavour violation at HERA

H1 Collaboration

Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Bucharest
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
University of Montenegro
Yerevan Physics Institute
Universités Paris VI and VII
c/o DESY
Institute of Physics and Technology of the Mongolian Academy of Sciences
Laboratoire de l'Accélérateur Linéaire
University of Belgrade
University of Birmingham
Institute of Experimental Physics Slovak Academy of Sciences
Max-Planck-Institut für Kernphysik
Max-Planck-Institut für Physik
Institute for Theoretical and Experimental Physics
Dept. Fis. Ap. CINVESTAV
Inter-University Institute for High Energies ULB-VUB
University of Antwerp
Charles University
Comenius University
CCLRC Rutherford Appleton Laboratory
Institute of Physics of the Czech Academy of Sciences
University of Liverpool
Bergische Universität Gesamthochschule Wuppertal
Aix Marseille Université
Universität Hamburg
Paul Scherrer Institut
CEA/UVSQ/CNRS
Institute for Nuclear Physics
European Organization for Nuclear Research
ETH Zurich
Lancaster University
University of Heidelberg
CINVESTAV-IPN
University of P.J. Šafárik
Lund University
Joint Institute for Nuclear Research, Dubna
Queen Mary University of London
RWTH Aachen University
Physik-Institut der Universität Zürich
National Technical University of Athens
University Roma Tre
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Ulaanbaatar University
University of Dortmund

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep→μX and ep→τX is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy √s=319 GeV is used for the analysis, corresponding to an integrated luminosity of 245 pb^-1 of e+p and 166 pb^-1 of e^-p collision data. No evidence for the production of such leptoquarks is observed in the H1 data. Leptoquarks produced in e±p collisions with a coupling strength of λ=0.3 and decaying with the same coupling strength to a muon-quark pair or a tau-quark pair are excluded at 95% confidence level up to leptoquark masses of 712 GeV and 479 GeV, respectively.

Original language	English
Pages (from-to)	20-30
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	701
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2011.05.023
Publication status	Published - 1 Jun 2011

Keywords

Electron-proton scattering
Lepton flavor violation
Leptoquarks

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10.1016/j.physletb.2011.05.023

Cite this

@article{da2522dd1d0a4a63bf823e217e46d0f1,

title = "Search for lepton flavour violation at HERA",

abstract = "A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep→μX and ep→τX is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy √s=319 GeV is used for the analysis, corresponding to an integrated luminosity of 245 pb-1 of e+p and 166 pb-1 of e-p collision data. No evidence for the production of such leptoquarks is observed in the H1 data. Leptoquarks produced in e±p collisions with a coupling strength of λ=0.3 and decaying with the same coupling strength to a muon-quark pair or a tau-quark pair are excluded at 95\% confidence level up to leptoquark masses of 712 GeV and 479 GeV, respectively.",

keywords = "Electron-proton scattering, Lepton flavor violation, Leptoquarks",

author = "\{H1 Collaboration\} and Aaron, \{F. D.\} and C. Alexa and V. Andreev and S. Backovic and A. Baghdasaryan and S. Baghdasaryan and E. Barrelet and W. Bartel and K. Begzsuren and A. Belousov and P. Belov and Bizot, \{J. C.\} and V. Boudry and I. Bozovic-Jelisavcic and J. Bracinik and G. Brandt and M. Brinkmann and V. Brisson and D. Britzger and D. Bruncko and A. Bunyatyan and G. Buschhorn and L. Bystritskaya and Campbell, \{A. J.\} and \{Cantun Avila\}, \{K. B.\} and F. Ceccopieri and K. Cerny and V. Cerny and V. Chekelian and Contreras, \{J. G.\} and Coughlan, \{J. A.\} and J. Cvach and Dainton, \{J. B.\} and K. Daum and B. Delcourt and J. Delvax and \{De Wolf\}, \{E. A.\} and C. Diaconu and M. Dobre and V. Dodonov and A. Dossanov and A. Dubak and G. Eckerlin and S. Egli and A. Eliseev and E. Elsen and L. Favart and A. Fedotov and R. Felst and A. Specka",

year = "2011",

month = jun,

day = "1",

doi = "10.1016/j.physletb.2011.05.023",

language = "English",

volume = "701",

pages = "20--30",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - Search for lepton flavour violation at HERA

AU - H1 Collaboration

AU - Aaron, F. D.

AU - Alexa, C.

AU - Andreev, V.

AU - Backovic, S.

AU - Baghdasaryan, A.

AU - Baghdasaryan, S.

AU - Barrelet, E.

AU - Bartel, W.

AU - Begzsuren, K.

AU - Belousov, A.

AU - Belov, P.

AU - Bizot, J. C.

AU - Boudry, V.

AU - Bozovic-Jelisavcic, I.

AU - Bracinik, J.

AU - Brandt, G.

AU - Brinkmann, M.

AU - Brisson, V.

AU - Britzger, D.

AU - Bruncko, D.

AU - Bunyatyan, A.

AU - Buschhorn, G.

AU - Bystritskaya, L.

AU - Campbell, A. J.

AU - Cantun Avila, K. B.

AU - Ceccopieri, F.

AU - Cerny, K.

AU - Cerny, V.

AU - Chekelian, V.

AU - Contreras, J. G.

AU - Coughlan, J. A.

AU - Cvach, J.

AU - Dainton, J. B.

AU - Daum, K.

AU - Delcourt, B.

AU - Delvax, J.

AU - De Wolf, E. A.

AU - Diaconu, C.

AU - Dobre, M.

AU - Dodonov, V.

AU - Dossanov, A.

AU - Dubak, A.

AU - Eckerlin, G.

AU - Egli, S.

AU - Eliseev, A.

AU - Elsen, E.

AU - Favart, L.

AU - Fedotov, A.

AU - Felst, R.

AU - Specka, A.

PY - 2011/6/1

Y1 - 2011/6/1

N2 - A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep→μX and ep→τX is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy √s=319 GeV is used for the analysis, corresponding to an integrated luminosity of 245 pb-1 of e+p and 166 pb-1 of e-p collision data. No evidence for the production of such leptoquarks is observed in the H1 data. Leptoquarks produced in e±p collisions with a coupling strength of λ=0.3 and decaying with the same coupling strength to a muon-quark pair or a tau-quark pair are excluded at 95% confidence level up to leptoquark masses of 712 GeV and 479 GeV, respectively.

AB - A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep→μX and ep→τX is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy √s=319 GeV is used for the analysis, corresponding to an integrated luminosity of 245 pb-1 of e+p and 166 pb-1 of e-p collision data. No evidence for the production of such leptoquarks is observed in the H1 data. Leptoquarks produced in e±p collisions with a coupling strength of λ=0.3 and decaying with the same coupling strength to a muon-quark pair or a tau-quark pair are excluded at 95% confidence level up to leptoquark masses of 712 GeV and 479 GeV, respectively.

KW - Electron-proton scattering

KW - Lepton flavor violation

KW - Leptoquarks

U2 - 10.1016/j.physletb.2011.05.023

DO - 10.1016/j.physletb.2011.05.023

M3 - Article

AN - SCOPUS:79959538004

SN - 0370-2693

VL - 701

SP - 20

EP - 30

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Search for lepton flavour violation at HERA

Abstract

Keywords

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