منابع مشابه
Four fermion processes at LEP II
In its second phase, LEP has given the unique opportunity to study four fermion processes never observed before. This papers deals with a preliminary study of W W , W eν, ZZ and Zγ ⋆ production in e + e − collisions. Measurement results on W W cross section, W branching fractions, W W V (V = Z/γ) anomalous couplings and W average polarization in W W events are presented. Moreover cross section ...
متن کاملNon Abelian Gauge Couplings in Four Fermion Processes at Lep
The center of mass (c.m.) energy reached at LEP2 allows to test directly the non abelian gauge couplings in ee collisions. The most copiously produced final states are four fermion final states, which, apart from being very important in the measurement of the W properties such as mass and width , contain information on the interactions among the gauge vector bosons. In order to study the trilin...
متن کاملHUNTING VIRTUAL LSPs AT LEP 200
Relatively light sneutrinos, which are experimentally allowed, may significantly affect the currently popular search strategies for supersymmetric particles by decaying dominantly into an invisible channel. In certain cases the second lightest neutralino may also decay invisibly leading to two extra carriers of missing energy – in addition to the lightest supersymmetric particle (LSP) Z̃1 – the ...
متن کاملEXCALIBUR – a Monte Carlo program to evaluate all four fermion processes at LEP 200 and beyond 1
A Monte Carlo program is presented that computes all four fermion processes in e + e − annihilation. QED initial state corrections and QCD contributions are included. Fermions are taken to be massless, allowing a very fast evaluation of the matrix element. A systematic, modular and self-optimizing strategy has been adopted for the Monte Carlo integration, that serves also as an example for furt...
متن کاملQuark-gluon Jet Differences at Lep *
A new method to identify the gluon jet in 3-jet " Y " decays of Z 0 is presented. The method is based on differences in particle multiplicity between quark jets and gluon jets, and is more effective than tagging by leptonic decay. An experimental test of the method and its application to a study of the " string effect " are proposed. Various jet-finding schemes for 3-jet events are compared.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1994
ISSN: 0370-2693
DOI: 10.1016/0370-2693(94)90382-4