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Leif Jönsson

Leif Jönsson

Professor emeritus

Leif Jönsson

Search for lepton flavour violation in ep collisions at HERA

Author

  • A. Aktas
  • Magnus Hansson
  • Leif Jönsson
  • Albert Knutsson
  • Sakar Osman

Summary, in English

A search for the lepton flavour violating processes ep→μX and ep→τX is performed with the H1 experiment at HERA. Final states with a muon or tau and a hadronic jet are searched for in a data sample corresponding to an integrated luminosity of 66.5 pb-1 for e+p collisions and 13.7 pb-1 for e-p collisions at a centre-of-mass energy of 319 GeV. No evidence for lepton flavour violation is found. Limits are derived on the mass and the couplings of leptoquarks inducing lepton flavour violation in an extension of the Buchmüller–Rückl–Wyler effective model. Leptoquarks produced in ep 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 masses of 459 GeV and 379 GeV, respectively.

Department/s

  • Particle and nuclear physics

Publishing year

2007

Language

English

Pages

833-847

Publication/Series

European Physical Journal C

Volume

52

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044