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arXiv 0903.4978hep-ph
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通过一般2 HDM中的γ-γ散射产生单个希格斯玻色子

Single Higgs-boson production through gamma-gamma scattering within the general 2HDM

Nicolas Bernal, David Lopez-Val, Joan Sola

摘要:

在一般的双希格斯玻色子模型(2 HDM)下,利用线性对撞机研究了环诱导的γ-γ碰撞产生单个中性希格斯玻色子玻色子h.分析了两种不同的机制:一种是γ-γ对撞机中两个实光子的散射γ-> h,另一种是更传统的虚光子聚变机制e+e->e+e- + h。由于希格斯玻色子玻色子在一般2 HDM中的自相互作用的特殊性质,我们发现,只要带电的希格斯质量不太重,总的产生率可以显着提高。例如,如果后者略高于100 GeV,并且最轻的CP偶希格斯玻色子落在SM希格斯质量的LEP束缚的范围内,达到几百GeV,则截面通常会使σ(gamma gamma-> h)= 0.1-1 pb和σ(e+e-> e+e- + h)\sim 0.01 pb --在这两种情况下都远高于SM预测。虽然当带电希格斯粒子的质量超过300 GeV时,速率对希格斯玻色子玻色子的自耦合几乎不敏感,但汤川耦合和规范玻色子的联合作用所产生的非SM效应的重要尾部仍然可以揭示一个确凿的证据。

英文摘要:

The production of a single neutral Higgs boson h through (loop-induced) gamma-gamma collisions is explored in the context of the linear colliders within the general Two-Higgs-Doublet Model (2HDM). Two different mechanisms are analyzed: on the one hand, the scattering gamma gamma-> h of two real photons in a gamma-gamma collider; on the other, the more traditional mechanism of virtual photon fusion, e+e- -->e+e- + h. Owing to the peculiar properties of the Higgs boson self-interactions within the general 2HDM, we find that the overall production rates can be boosted up significantly, provided the charged Higgs mass is not too heavy. For example, if the latter is slightly above 100 GeV and, in addition, the lightest CP-even Higgs boson falls in the ballpark of the LEP bound on the SM Higgs mass up to a few hundred GeV, the cross-sections may typically render σ(gamma gamma-> h)= 0.1-1 pb and σ(e+e- --> e+e- + h)\sim 0.01 pb -- in both cases well above the SM prediction. Although for charged Higgs masses above 300 GeV the rates become virtually insensitive to the Higgs boson self-couplings, a significant tail of non-SM effects produced by the combined contribution of the Yukawa couplings and gauge bosons could still reveal a smoking gun.

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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