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arXiv 1007.0286hep-ph
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在CERN大型强子对撞机上对b \bar{b} -> W^{ \pm }π^{ \mp }_t的技术色修正

Technicolor corrections to b\bar{b} -> W^{\pm}π^{\mp}_t at the CERN Large Hadron Collider

Jinshu Huang, Qunna Pan, Taiping Song, Gongru Lu

摘要:

本文采用顶色辅助的人工色模型,计算了在CERN大型强子对撞机上通过b \bar{b}湮灭产生的带电顶介子与W玻色子的人工色修正。我们发现,在合理的参数范围内,pp \rightarrow b \bar{b} -> W^{\pm }π_t^{ \mp }在树水平上的截面可以达到几百飞秒,大致对应于最小超对称标准模型中过程pp -> b \bar{b} -> W^{\pm }H^{ \mp }的结果;由单回路图引起的相对校正约为百分之几到百分之二十,并且它们将增加树级的截面。作为比较,我们还讨论了通过另一个子过程gg -> W^{ \pm }π_t^{ \mp }得到的强子截面的大小.

英文摘要:

In this paper we calculate the technicolor correction to the production of a charged top pion in association with a W boson via b\bar{b} annihilation at the CERN Large Hadron Collider in the context of the topcolor assisted technicolor model. We find that the cross section of pp \rightarrow b\bar{b} -> W^{\pm}π_t^{\mp} at the tree level can reach a few hundred femtobarns for reasonable ranges of the parameters, roughly corresponding to the result of the process pp -> b\bar{b} -> W^{\pm}H^{\mp} in the minimal supersymmetric standard model; the relative corrections arising from the one-loop diagrams are about a few percent to two dozen percent, and they will increase the cross section at the tree level. As a comparison, we also discuss the size of the hadron cross section via the other subprocess gg -> W^{\pm}π_t^{\mp}.

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