Impact of squark generation mixing on the search for squarks decaying into fermions at LHC

Autor(en)

Alfred Bartl, Helmut Eberl, Björn Herrmann, Keisho Hidaka, Walter Majerotto, Werner Porod

Abstrakt

We study the effect of squark generation mixing on squark production and decays at LHC in the Minimal Supersymmetric Standard Model (MSSM). We show that the effect can be very large despite the very strong constraints on quark-flavour violation (QFV) from experimental data on B mesons. We find that the two lightest up-type squarks (u) over bar (1.2) can have large branching ratios for the decays into c (chi) over bar (0)(1) and t (chi) over bar (0)(1) at the same time due to squark generation mixing, leading to QFV signals 'pp -> c (t) over bar (t (c) over bar) + missing-E(T) + X' with a significant rate. The observation of this remarkable signature would provide a powerful test of supersymmetric QFV at LHC. This could have a significant impact on the search for squarks and the determination of the underlying MSSM parameters.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), Deutsches Elektronen-Synchrotron DESY, Tokyo Gakugei University (TGU), Julius-Maximilians-Universität Würzburg

Journal

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

Band

698

Seiten

380-388

Anzahl der Seiten

9

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2011.01.020

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103012 Hochenergiephysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/impact-of-squark-generation-mixing-on-the-search-for-squarks-decaying-into-fermions-at-lhc(703b1eb0-185a-429c-9294-b6fff72169b8).html