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arXiv 1502.04113hep-phhep-ex
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标准模型中gg --> VV的重Higgs信号背景干扰

Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet

Nikolas Kauer, Claire O'Brien

摘要:

本文研究了在大型强子对撞机上,用实标量单重场扩展的标准模型,对于gg --> ZZ,WW --> 4轻子过程,由于连续谱背景和离壳轻Higgs贡献的干扰,重Higgs信号的变化.对于积分截面,干涉效应的范围可以从O(10%)到O(1)。尽管重希格斯连续谱和重希格斯-轻希格斯干涉之间存在很强的抵消作用,但完全的干涉显然是不可忽略的,并改变了重希格斯线的形状。一|M_VV - M_h2| < Gamma_h2 cut将干扰效应减轻到O(10%)或更少。提供了一个允许模拟完全干扰的公共程序。

英文摘要:

For the Standard Model extended with a real scalar singlet field, the modification of the heavy Higgs signal due to interference with the continuum background and the off-shell light Higgs contribution is studied for gg --> ZZ, WW --> 4 lepton processes at the Large Hadron Collider. Interference effects can range from O(10%) to O(1) effects for integrated cross sections. Despite a strong cancellation between the heavy Higgs-continuum and the heavy Higgs-light Higgs interference, the full interference is clearly non-negligible and modifies the heavy Higgs line shape. A |M_VV - M_h2| < Gamma_h2 cut mitigates interference effects to O(10%) or less. A public program that allows to simulate the full interference is presented.

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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