6533b837fe1ef96bd12a27f4
RESEARCH PRODUCT
Impact of squark generation mixing on the search for gluinos at LHC
K. Hohenwarter-sodekWerner PorodKeisho HidakaW. MajerottoAlfred BartlAlfred BartlThomas Kernreitersubject
PhysicsNuclear and High Energy PhysicsParticle physicsGluinoLarge Hadron Collider010308 nuclear & particles physicsBranching fractionHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyFOS: Physical sciencesObservableParameter space01 natural sciencesHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - PhenomenologyHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical sciencesB mesonHigh Energy Physics::Experiment010306 general physicsMixing (physics)Minimal Supersymmetric Standard Modeldescription
We study gluino decays in the Minimal Supersymmetric Standard Model (MSSM) with squark generation mixing. We show that the effect of this mixing on the gluino decay branching ratios can be very large in a significant part of the MSSM parameter space despite the very strong experimental constraints on quark flavour violation (QFV) from B meson observables. Especially we find that under favourable conditions the branching ratio of the QFV gluino decay (g) over tilde -> c (t) over tilde)((c) over tildet)(chi) over tilde (0)(1) can be as large as similar to 50%. We also find that the squark generation mixing can result in a multiple-edge (3- or 4-edge) structure in the charm-top quark invariant mass distribution. The appearance of this remarkable structure provides an additional powerful test of supersymmetric QFV at LHC. These could have an important impact on the search for gluinos and the determination of the MSSM parameters at LHC. (C) 2009 Elsevier B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-08-01 |