Flavour violating squark and gluino decays at LHC

TL;DR

This paper investigates how squark generation mixing in the MSSM affects squark and gluino decays at the LHC, revealing potential large flavor-violating signals that are crucial for supersymmetry searches.

Contribution

It demonstrates that flavor mixing can lead to significant flavor-violating decay rates of squarks and gluinos at the LHC, highlighting the importance of including these effects in experimental analyses.

Findings

Large branching ratios for flavor-violating decays under certain parameters

Significant flavor-violating signals like pp -> t t̄ c c̄ + missing E_T at 14 TeV

Flavor mixing effects impact MSSM parameter determination at LHC

Abstract

We study the effects of squark generation mixing on squark and gluino production and decays at LHC in the Minimal Supersymmetric Standard Model (MSSM) with focus on the mixing between second and third generation squarks. Taking into account the constraints from B-physics experiments we show that various regions in parameter space exist where decays of squarks and/or gluinos into quark flavour violating (QFV) final states can have large branching ratios. Here we consider both fermionic and bosonic decays of squarks. Rates of the corresponding QFV signals, e.g. pp -> t t bar{c} bar{c} missing-E_T X, can be significant at LHC(14 TeV). We find that the inclusion of flavour mixing effects can be important for the search of squarks and gluinos and the determination of the underlying model parameters of the MSSM at LHC.