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arXiv 0910.3049hep-phhep-ex
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再访LHC异常顶胶子耦合的研究

Search for anomalous top-gluon couplings at LHC revisited

Zenro Hioki, Kazumasa Ohkuma

摘要:

通过LHC上的顶夸克对产生,我们研究了SU(3)xSU(2)xU(1)不变维6有效算符产生的非标准顶胶子耦合的可能效应。我们计算了总截面以及作为两个耦合参数的函数的p p -> t tbar X的一些分布,即,顶部的色电和色磁矩,其受在Tevatron测量的总截面σ(p pbar -> t tbar X)的约束。我们发现LHC可能会给我们一些机会来观察这些新的耦合引起的相当大的影响。

英文摘要:

Through top-quark pair productions at LHC, we study possible effects of nonstandard top-gluon couplings yielded by SU(3)xSU(2)xU(1) invariant dimension-6 effective operators. We calculate the total cross section and also some distributions for p p -> t tbar X as functions of two anomalous-coupling parameters, i.e., the chromoelectric and chromomagnetic moments of the top, which are constrained by the total cross section sigma(p pbar -> t tbar X) measured at Tevatron. We find that LHC might give us some chances to observe sizable effects induced by those new couplings.

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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