Search for lepton flavour violation at HERA
H1 Collaboration (ukupan broj autora: 207)
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A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep - GT mu X and ep - GT tau X is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy root 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 lambda = 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. (C) 2011 Elsevier B.V. All rights reserved.
Keywords:Lepton flavor violation / Leptoquarks / Electron-proton scattering
Source:Physics Letters B, 2011, 701, 1, 20-30
- Helmholtz Association (HGF) [VH-NG-401], European Social Fund, National Resources, UK Science and Technology Facilities Council, FNRS-FWO-Vlaanderen, IISN-IIKW, IWT, Belgian Science Policy, Romanian National Authority for Scientific Research [PN 09370101], Polish Ministry of Science and Higher Education [DPN/N168/DESY/2009], Bundesministerium fur Bildung und Forschung, FRG [05H09GUF, 05H09VHC, 05H09VHF, 05H16PEA], VEGA SR [2/7062/ 27], Swedish Natural Science Research Council, CONACYT, Mexico [48778-F], Russian Foundation for Basic Research (RFBR) [1329.2008.2], Deutsche Forschungsgemeinschaft, Ministry of Science of Montenegro [05-1/3-3352], Ministry of Education of the Czech Republic [LC527, INGO-LA09042, MSM0021620859], Swiss National Science Foundation, DESY directorate