arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1502.04678hep-phhep-ex
收藏

Higgs末态的壳层干涉效应

On-shell interference effects in Higgs final states

Christoph Englert, Ian Low, Michael Spannowsky

摘要:

通过胶子融合产生的希格斯粒子中的顶夸克环在大的不变终态质量下可以在寻找额外的希格斯玻色子时引起重要的干扰效应,如在,例如,希格斯门场景和MSSM时,重标量是广泛的或最终状态的分辨率是穷人。目前,由ATLAS和CMS执行的限制设置是基于注入重的希格斯类信号,忽略干扰效应。在本文中,我们进行了一项研究,这样的“上壳”的干扰效果,在$pp\to ZZ$,并发现它们导致一个$\lesssim{\cal{O}}(30%)$宽度方案相关的修改的信号强度。包括连续贡献以获得例如完整的$pp\to ZZ \to 4\ell$最终状态,该修改在所考虑的中间质量范围内减少到10%水平。

英文摘要:

Top quark loops in Higgs production via gluon fusion at large invariant final state masses can induce important interference effects in searches for additional Higgs bosons as predicted in, e.g., Higgs portal scenarios and the MSSM when the heavy scalar is broad or the final state resolution is poor. Currently, the limit setting as performed by both ATLAS and CMS is based on injecting a heavy Higgs-like signal neglecting interference effects. In this paper, we perform a study of such "on-shell" interference effects in $pp\to ZZ$ and find that they lead to a $\lesssim{\cal{O}}(30%)$ width scheme-dependent modification of the signal strength. Including the continuum contributions to obtain e.g. the full $pp\to ZZ \to 4\ell$ final state, this modification is reduced to the 10% level in the considered intermediate mass range.

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。

↑