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arXiv 2004.08834hep-ph
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光子-光子碰撞中带电希格斯玻色子玻色子对产生的精确预言

Precise predictions for charged Higgs boson pair production in photon-photon collisions

Mehmet Demirci

摘要:

在双Higgs二重态模型(2 HDM)的框架下研究了光子-光子碰撞产生带电Higgs对的过程,考虑了完整的单圈能级散射振幅,包括电弱(EW)修正以及软和硬QED辐射。数值评估进行了三种不同的情况下,所谓的不对齐,低- $m_H$和短级联,定义在最新的实验约束的存在下,并符合理论约束以及。在平面($m_{ϕ^0},\sqrt{s}$)上扫描$γγ\rightarrow H^{-}H^{+}$的总横截面,其中$ϕ^0$对于低$m_{H^0}$场景是$h^0$,而对于其他两个场景是$H^0$。对于每个场景,突出显示了参数空间中生产率足够大的区域。讨论了初始光束在不同偏振碰撞模式下的产生率。它可以被高能量的反向极化光子和低能量的右旋极化光子增强两倍。此外,还针对每种情况检查了带电希格斯玻色子的衰变通道。据观察,单回路EW校正,即,虚辐射校正加上实辐射校正减小了树级横截面,并且根据模型参数,相对校正通常在$-10\%$到$-30\%$的范围内。

英文摘要:

The charged Higgs pair production via photon-photon collisions is investigated in the framework of two Higgs doublet model (2HDM), taking into account a full set of one-loop-level scattering amplitudes, i.e., including electroweak (EW) corrections together with soft and hard QED radiation. The numerical evaluation is carried out for three different scenarios, so-called non-alignment, low-$m_H$ and short-cascade, defined in the presence of the up-to-date experimental constraints and consistent with theoretical constraints as well. The total cross sections of $γγ\rightarrow H^{-}H^{+}$ are scanned over the plane ($m_{ϕ^0},\sqrt{s}$), where $ϕ^0$ is $h^0$ for low-$m_{H^0}$ scenario and $H^0$ for other two scenarios. The regions of the parameter space in which the production rates are sufficiently large are highlighted for each scenario. The production rates in different polarization collision modes of initial beams are also discussed. It can be enhanced up to two-times by oppositely polarized photons at high energies and right-handed polarized photons at low energies. Furthermore, decay channels of the charged Higgs boson are examined for each scenario. It is observed that the one-loop EW corrections, i.e., the virtual plus real radiation corrections, reduce the tree-level cross sections and the relative correction is typically in the range of $-10\%$ to $-30\%$, depending on model parameters.

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