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arXiv 0904.0597hep-phhep-ex
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R宇称违反MSSM的顶夸克三体衰变

Top quark three-body decays in the R-parity violating MSSM

Zhaoxia Heng, Gongru Lu, Lei Wu, Jin Min Yang

摘要:

在最小超对称标准模型中,R宇称破坏的相互作用可以引发顶夸克的各种奇异三体衰变,这在LHC上是可以实现的。本文研究了R破坏衰变t-> cX_1X_2,其中包括树级过程t-> cl ^-i l^+ j(l_i=e,mu,tau)和t-> cd_i \bar{d}_j(d_i=d,s,b),以及环诱导过程t-> cgX(X=g,γ,Z,h).我们发现,到目前为止,弱约束的R-破坏耦合可以使衰变分支比相当可观,其中一些已经达到Tevatron对撞机的灵敏度,可以在LHC更好的灵敏度。

英文摘要:

In the minimal supersymmetric standard model the R-parity violating interactions can trigger various exotic three-body decays for the top quark, which may be accessible at the LHC. In this work we examine the R-violating decays t-> c X_1 X_2, which include the tree-level processes t-> c l^-_i l^+_j (l_i=e, mu, tau) and t->c d_i \bar{d}_j (d_i=d, s, b), as well as the loop induced processes t->c g X (X=g, γ, Z, h). We find that the hereto weakly constrained R-violating couplings can render the decay branching ratios quite sizable, some of which already reach the sensitivity of the Tevatron collider and can be expored at the LHC with better sensitivity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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