Impact of squark generation mixing on the search for gluinos at LHC

Autor(en)

Alfred Bartl, Keisho Hidaka, Karl Hohenwarter-Sodek, Thomas Kernreiter, Walter Majerotto, Werner Porod

Abstrakt

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 View the MathML source can be as large as not, vert, similar50%. 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.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Tokyo Gakugei University (TGU), Instituto Superior Técnico, Österreichische Akademie der Wissenschaften (ÖAW), Julius-Maximilians-Universität Würzburg

Journal

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Band

679

Seiten

260-266

Anzahl der Seiten

7

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2009.07.050

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d5f7141a-1f6b-4575-be5b-d4348edb5442