On-shell interference effects in Higgs boson final states
On-shell interference effects in Higgs boson final states
复制标题
希格斯玻色子最终态的壳层干涉效应
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Spannowsky
中科院分区：
文献类型：
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作者：
C. Englert;I. Low;M. Spannowsky
通过胶子融合以大的不变终态质量产生希格斯粒子的顶夸克环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，希格斯门场景和最小的超对称标准模型时，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，我们进行了研究，这种“上壳”的干扰效应，
p
p
→
Z
Z
并发现它们会导致
≲
O
(
30
%
)
信号强度的宽度方案相关修改。包括连续贡献以获得，例如，充分
p
p
→
Z
Z
→
4
L
在最终状态下，在所考虑的中间质量范围内，该修改降低至10%水平。
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 minimal supersymmetric Standard Model 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
p
p
→
Z
Z
and find that they lead to a
≲
O
(
30
%
)
width scheme-dependent modification of the signal strength. Including the continuum contributions to obtain, e.g., the full
p
p
→
Z
Z
→
4
l
final state, this modification is reduced to the 10% level in the considered intermediate mass range.