论文标题
在3 TEV CLIC处的希格斯分支比率BR（$ h \rightarrowγ$）的测量
MEASUREMENT OF THE HIGGS BRANCHING RATIO BR($H\rightarrowγγ$) AT 3 TeV CLIC
论文作者
论文摘要
在本文中，我们介绍了3 TEV质量中心能量紧凑的线性对撞机（CLIC）的潜力，以测量希格斯玻色子衰变到两个光子BR（$ h \rightarrowγγ$）的分支分数。由于光子是无质量的，因此希格斯玻色子耦合到光子是通过涉及标准模型或更高版本的重颗粒的高阶过程实现的。从标准模型的预测中，测得的BR（$ h \ \rightArrowγ$）的任何偏差（$ h \rightArrowγ$），因此，Higgs耦合$ G_ {Hγγ} $，可能表明新的物理学。因此，希格斯对两个光子的衰减是希格斯扇区的有趣探针。 这项研究是使用用于CLIC的检测器的仿真，并考虑完整重建链中的所有相关物理和梁诱导的过程。结果表明，Higgs生产横截面以$ W^+W^ - $ Fusion和BR（$ H \rightArrowγγ$）的相对统计不确定性为5.5 \％，假设综合亮度为5 AB $^$^{ - 1} $，则可以测量BR（$ H \rightArrowγγ$）。
In this paper we address the potential of a 3 TeV centre-of-mass energy Compact Linear Collider (CLIC) to measure the branching fraction of the Higgs boson decay to two photons, BR($H\rightarrowγγ$). Since photons are massless, the Higgs boson coupling to photons is realized through higher order processes involving heavy particles either from the Standard Model or beyond. Any deviation of the measured BR($H\rightarrowγγ$), and consequently of the Higgs coupling $g_{Hγγ}$ from the predictions of the Standard Model, may indicate New Physics. The Higgs decay to two photons is thus an interesting probe of the Higgs sector. This study is performed using simulation of the detector for CLIC and by considering all relevant physics and beam-induced processes in a full reconstruction chain. It is shown that the product of the Higgs production cross-section in $W^+W^-$ fusion and BR($H\rightarrowγγ$) can be measured with a relative statistical uncertainty of 5.5\%, assuming the integrated luminosity of 5 ab$^{-1}$ and unpolarized beams.
