Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-11
PoS EPS-HEP2009 2009:226,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, to be published in the proceedings of European Physical Society Europhysics Conference on High Energy Physics,EPS-HEP
Scientific paper
Events with isolated leptons and missing energy in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model (SM) sources of isolated trilepton final states include gauge boson pair production such as WZ and W gamma^{*}, and t-bar t production. Symbol gamma^* represents a virtual photon. Our new contribution is the demonstration that bottom and charm meson decays, b to l X and c to l X$, produce isolated lepton (l) events that can overwhelm the effects of other processes. We compute contributions from a wide range of SM heavy flavor processes. In all these cases, one or more of the final observed isolated leptons comes from a heavy flavor decay. We propose new cuts to control the heavy flavor backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models.
Berger Edmond L.
Sullivan Zack
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