在μ子对撞机上揭示广义2HDM中的CP-odd希格斯粒子
Unveiling the CP-odd Higgs in a Generalized 2HDM at a Muon Collider
AI总结：
本研究针对μ子g-2反常问题，在满足多类约束的广义2HDM参数空间中，提出在3 TeVμ子对撞机上通过轻CP-odd希格斯粒子与光子协同产生及衰变信号探测该粒子的方案，灵敏度优于LHC。
摘要：
我们在μ子对撞机的背景下，重新研究了具有微扰轻子特异性（X型）汤川区的广义双希格斯二重态模型（2HDM）。该模型存在大范围的参数空间，可为观测到的μ子（g-2）反常提供解决方案。具体而言，该模型的低质量CP-odd标量在拟合这一反常中发挥着重要作用。有趣的是，赝标量与μ子的耦合正比于$\tan β$（希格斯二重态的真空期望值之比），该参数主导着μ子磁矩的单圈和双圈贡献，因此与大型强子对撞机（LHC）相比，它可以在μ子对撞机上以更高的灵敏度被直接探测。我们主要聚焦于满足μ子g-2反常的参数空间，探究了来自真空稳定性、幺正性、轻子味破坏（LFV）、电弱精确约束、B介子衰变以及对撞机实验的现有理论和实验约束。在满足所有这些约束的参数空间中，我们提议在3 TeVμ子对撞机上研究轻赝标量$A$与光子协同产生的过程。$A$随后衰变为τ对，将产生显著的$l^+ l^- γ$加缺失能信号。
英文摘要：
We revisit the generalized two-Higgs-doublet model (2HDM) with a minimally perturbed lepton specific (Type-X) Yukawa sector in context of the muon collider. The model offers a large region of parameter space where it can provide a solution to the observed muon ($g-2$) excess. Specifically the low mass CP odd scalar of this model plays an important role to fit this anomaly. Interestingly, the coupling of the pseudo scalar with the muons is proportional to $\tan β$ (the ratio of VEVs of the Higgs doublets) which dominantly controls the one loop and two loop contributions of the muon magnetic moment, therefore it can be probed directly at a muon collider with greater sensitivity in comparison to Large Hadron Collider (LHC). Primarily focusing on a parameter space where muon $g-2$ anomaly is satisfied, we explore the available theoretical and experimental constraints arising from vacuum stability, unitarity, lepton falvour violation (LFV), electroweak precision constraint, B-meson decay and collider experiments on the model. In the parameter space where all these constraints are satisfied, we propose to study the production of the light pseudo-scalar $A$ in association with a photon at a $3$ TeV muon collider. Subsequent decay of $A$ into a $τ$ pair will produce a striking $l^+ l^- γ$ plus missing energy signature.
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。
