Flavour violating up-squark decays at LHC

Author(s)
Helmut Eberl, Alfred Bartl, Björn Herrmann, Keisho Hidaka, Walter Majerotto, Werner Porod
Abstract

We study the effect of squark generation mixing on squark production and decays at the 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 tilde (1,2) can have large branching ratios for the decays into c (chi) over tilde (0)(1) and t (chi) over tilde (0)(1) at the same time, 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(s)
Particle Physics
External organisation(s)
Österreichische Akademie der Wissenschaften (ÖAW), Deutsches Elektronen-Synchrotron DESY, Tokyo Gakugei University (TGU), Julius-Maximilians-Universität Würzburg
Journal
Fortschritte der Physik
Volume
59
Pages
1075-1078
No. of pages
4
ISSN
0015-8208
DOI
https://doi.org/10.1002/prop.201100061
Publication date
2011
Peer reviewed
Yes
Austrian Fields of Science 2012
103012 High energy physics, 103034 Particle physics
Portal url
https://ucrisportal.univie.ac.at/en/publications/flavour-violating-upsquark-decays-at-lhc(27035e67-5a62-4495-995a-1561e550db2d).html