Abstract
We study single top production at the LHC in a SUSY-QCD model with a heavy Dirac gluino. The presence of a heavy Dirac gluino allows for notable top-up flavour changing neutral currents. In this scenario, we find that the process ug→tg gives the largest contribution to single top production via FCNCs at the LHC. The key features of this signal are that the top quark is produced very forward and that it is asymmetric to its anti-top counterpart, as the latter lacks a valence quark.
Highlights
Due to its large mass, the top quark’s presence as an initial partonic state at hadron colliders is negligible
In this paper we study the effects of the extra squark mixing freedom that heavy Dirac gluinos allow on single top production
We have studied single top production at the LHC in a SUSY-QCD model with a heavy Dirac gluino
Summary
Due to its large mass, the top quark’s presence as an initial partonic state at hadron colliders is negligible. It was found that heavy Dirac gauginos suppress the SUSY contributions to neutral meson mixing, thereby relaxing the associated experimental constraints on squark mixing. The Dirac gauginos were considered in the context of the Minimal R-symmetric Supersymmetric Standard Model (MRSSM): a SUSY extension of the SM in which the global U (1)R symmetry of the N=1 superalgebra remains unbroken. In this paper we study the effects of the extra squark mixing freedom that heavy Dirac gluinos allow on single top production. In this context the squark mixing of the third generation with the first is more relevant than with the second (stop-scharm), as only the former has all its constraints relaxed. Our focus will be on single top production via top-up FCNC processes in SUSY QCD
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