Decades of precision measurements have firmly established the Kobayashi-Maskawa phase as the dominant source of the charge-parity ($CP$) violation observed in weak quark decays. However, it is still unclear whether $CP$ violation is explicitly encoded in complex Yukawa matrices or instead stems from spontaneous symmetry breaking with underlying $CP$-conserving Yukawa and Higgs sectors. Here we study the latter possibility for the case of a generic two-Higgs-doublet model. We find that theoretical constraints limit the ratio $t_{\beta }$ of the vacuum expectation values (vevs) to the range $0.22\le t_{\beta }\le 4.5$ and imply the upper bounds $M_{H^{\pm }}\le 435\mathrm{GeV}$, $M_{H_2^0}\le 485\mathrm{GeV}$ and $M_{H_3^0}\le 545\mathrm{GeV}$ for the charged and extra neutral Higgs masses. We derive lower bounds on charged-Higgs couplings to bottom quarks which provide a strong motivation to study the nonstandard production and decay signatures $pp\to qb{H}^{\pm }(\to q^{\prime }b)$ with all flavors $q,q^{\prime }=u$, $c$, $t$ in the search for the charged Higgs boson. We further present a few benchmark scenarios with interesting discovery potential in collider analyses.

中文翻译：

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通过带电-希格斯-玻色子搜索来限制自发CP违反。

数十年来的精确测量已将小林-正川相牢固地确立为电荷奇偶校验的主要来源（$CP$）在弱的夸克衰变中观察到的违规行为。但是，目前尚不清楚$CP$ 违反是在复杂的Yukawa矩阵中明确编码的，或者源于自发对称性与基础的破坏 $CP$-保护汤川区和希格斯区。在这里，我们研究了通用的两希格斯双峰模型情况下的后一种可能性。我们发现理论约束限制了比率${Ť}_{\beta }$ 真空期望值（vevs）的范围 $0.22\le {Ť}_{\beta }\le 4.5$ 并暗示上限 ${\mathrm{中号}}_{H^{\pm }}\le 435\mathrm{GeV}$， ${\mathrm{中号}}_{H_2^0}\le 485\mathrm{GeV}$ 和 ${\mathrm{中号}}_{H_3^0}\le 545\mathrm{GeV}$对于带电的和额外的中性希格斯质量。我们推导出带电荷的希格斯耦合到底夸克的下界，这为研究非标准的产生和衰变特征提供了强大的动力。$pp\to qb{H}^{\pm }（\to q^{\prime }b）$与所有口味$q，q^{\prime }=ü$， $C$， $Ť$在寻找被指控的希格斯玻色子。我们进一步介绍了一些基准测试场景，这些碰撞场景在对撞机分析中具有有趣的发现潜力。