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arXiv 1404.3013hep-ph
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从Higgs衰变看Randall-Sundrum模型在未来对撞机上的研究

Prospect for Study of Randall-Sundrum model from Higgs decay at future colliders

Hirohisa Kubota, Mihoko Nojiri

摘要:

在一类Randall-Sundrum(RS)模型中,物质费米子和规范玻色子生活在一个五维的体中,而希格斯玻色子玻色子生活在一个四维的可见膜中。希格斯玻色子可以通过希格斯-镭子混合项与镭子混合。在大型强子对撞机(LHC)上直接发现重卡鲁扎-克莱因(KK)粒子是困难的,因为最轻的KK粒子的质量预计将超过10 TeV,以满足变化中性流(FCNC)的限制。相反,在高亮度LHC(HL-LHC)和国际直线对撞机(ILC)上对希格斯扇区的精确测量是一种有希望的方法,可以观察到希格斯-放射子混合引起的偏差以及KK规范玻色子和物质费米子的辐射修正。在某些情况下,这些效应是单独确定的,为模型提供了有价值的信息。我们执行广泛的扫描模型参数,看到希格斯耦合的预期偏差。我们还选择了几个与当前数据一致的参考点,以显示在未来的对撞机的基本参数测量精度。我们还研究了模型中的放射性-Z-Z耦合,并讨论了ILC在放射子搜索中的作用。

英文摘要:

In a class of Randall-Sundrum(RS) models, matter fermions and gauge bosons live in a five dimensional bulk, while the Higgs boson lives in a four dimensional visible brane. The Higgs boson can mix with a radion, by a Higgs-radion mixing term. It is difficult to directly discover the heavy Kaluza-Klein(KK) particles at the Large Hadron Collider(LHC), because the mass of the lightest KK particle is expected to be above 10 TeV to satisfy constraints from avor changing neutral currents(FCNC). Instead, the precision measurements of the Higgs sector at the high luminosity LHC(HL-LHC) and the International Linear Collider(ILC) is a promising way to observe the deviation originating from the Higgs-radion mixing and radiative corrections from the KK gauge bosons and matter fermions. For some cases, those effects are separately determined, providing valuable information on the model. We perform an extensive scan of the model parameters to see the expected deviations of the Higgs couplings. We also choose several reference points consistent with the current data to show the precision of the fundamental parameter measurements at the future colliders. We also study the radion-Z-Z coupling in the model and discuss the role of the ILC for radion search.

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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