Search for unstable neutral and charged heavy leptons in e+e− collisions at
نویسندگان
چکیده
منابع مشابه
A Search for Neutral Heavy Leptons
In e+eannihilations at SPEAR we have searched for narrow neutral resonances in the eT and ~.ln channels for masses between .5 GeV/c 2 and 1.5 GeV/c2. No evidence for such states has been found. Under standard theoretical assumptions for production cross sections and decay branching ratios of heavy leptons a lower limit of 1.2 GeV/c 2 can be set on the mass. *FJork supported by the Energy Resear...
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Four models are considered which contain heavy leptons beyond the three families of the standard model. Two are fourth-generation extensions of the standard model in which the right-handed heavy leptons are either isosinglets or in an isodoublet; the other two are motivated by the aspon model of CP violation. In all these models, the heavy neutrino can either be heavier than, or comparable in m...
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A review is given on the search for new heavy leptons in e+eand pj!i collisions. Invited talk at the XXl’Vth International Conference on High Energy Physics, Munich, Germany, August 4-10, 1988 1 5‘ * Wo;k’kpported by the Department of Energy, contract DE-AC03-76SF00515. tM&iling address: DESY F36, Notkestrafie 85, D 2000 Hamburg 52. Bitnet address: user F36WDB at node DHHDESYS. Search for new H...
متن کاملNeutral Heavy Leptons and Electroweak Baryogenesis
We investigate the possibility that baryogenesis occurs during the weak phase transition in a minimal extension of the Standard Model which contains extra neutral leptons and conserves total lepton number. The necessary CP-violating phases appear in the leptonic Yukawa couplings. We compute the CP-asymmetries in both the neutral and the charged lepton fluxes reflected in the unbroken phase. Usi...
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Abstract On this occasion to honour Professor Martin Perl’s 65th birthday, I present some of the important contributions of Martin to the field of strong interactions. I also present my own interest in studying lepton pairs in hadron collisions and the development of instrumentation to distinguish leptons from hadrons. These studies eventually led to the development of the idea and experimentat...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(96)01633-4