论文标题
重新访问轻度CP的标量上的超新星约束
Revisiting supernova constraints on a light CP-even scalar
论文作者
论文摘要
通过核心Bremsstrahlung Process $ n n \ to N N S $，由于其与Sm Higgs Boson的混合，可以在Supernova Core中大量生产出轻度CP-级标准模型（SM）量规标量表$ s $。包括有效的$ s $耦合到核子和PION介体，我们评估了$ s $粒子的生产幅度，并指出了众所周知的光CP-ODD标量（Axecion）和矢量玻色子（Dark Photon）案例的关键差异。考虑到随后的衰减和重新吸收$ S $，我们提供了$ S $粒子的能源损失率的完整计算。然后，我们使用SN1987A光度限制来得出有关标量$ S $与SM Higgs Boson的混合的更新超新星限制。我们发现，与Sm Higgs的混合角度$ \sinθ$仅在$ 3.9 \ times 10^{ - 7} $至$ 7.0 \ times 10^{ - 6} $的狭窄范围内排除，这取决于标量质量质量约为147 MEV，超出了Supernova限制的限制消失了。
A light CP-even Standard Model (SM) gauge-singlet scalar $S$ can be produced abundantly in the supernova core, via the nucleon bremsstrahlung process $N N \to N N S$, due to its mixing with the SM Higgs boson. Including the effective $S$ coupling to both nucleons and the pion mediators, we evaluate the production amplitude for the $S$ particle and point out a key difference with the well-known light CP-odd scalar (axion) and vector boson (dark photon) cases. Taking the subsequent decay and re-absorption of $S$ into account, we present a complete calculation of the energy loss rate for the $S$ particle. We then use the SN1987A luminosity constraints to derive updated supernova limits on the mixing of the scalar $S$ with the SM Higgs boson. We find that the mixing angle $\sinθ$ with the SM Higgs is excluded only in the narrow range of $3.9 \times 10^{-7}$ to $7.0 \times 10^{-6}$, depending on the scalar mass up to about 147 MeV, beyond which the supernova limit disappears.
