R-parity violating effects in top quark FCNC productions at LHC

Details R-parity violating effects in top quark FCNC productions at LHC R-parity violating effects in top quark FCNC productions at LHC

2008-12-09

arxiv.org/abs/0812.1698v2

Phys.Rev.D79:054003,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

version in PRD (discussions added)

Scientific paper

10.1103/PhysRevD.79.054003

In the minimal supersymmetric model the R-parity violating top quark interactions, which are so far weakly constrained, can induce various flavor-changing neutral-current (FCNC) productions for the top quark at the Large Hadron Collider (LHC). In this work we assume the presence of the B-violating couplings and examine their contributions to the FCNC productions proceeding through the parton processes cg -> t, gg -> t c_bar, cg -> t\gamma, cg -> t Z and cg -> t h. We find that all these processes can be greatly enhanced relative to the R-parity preserving predictions. In the parameter space allowed by current experiments, all the production channels except cg ->t h can reach the 3-sigma sensitivity, in contrast to the R-parity preserving case in which only cg -> t can reach the 3-sigma sensitivity.

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