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arXiv · 0812.1698

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

Junjie Cao·Zhaoxia Heng·Lei Wu·Jin Min Yang
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Abstract

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 -> tγ, 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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Junjie Cao, Zhaoxia Heng, Lei Wu, Jin Min Yang. 2009-03-07. R-parity violating effects in top quark FCNC productions at LHC. https://doi.org/10.1103/physrevd.79.054003

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