arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2603.04513hep-ph
收藏

改进的超新星对CP-even标量的约束:冷却与衰变限制

Improved supernova bounds on CP-even scalars: cooling and decay constraints

University of Utah(犹他大学)

Melissa Joseph, Samuel Liebersbach, Anirudhan A. Madathil, Gustavo Marques-Tavares

AI总结:

本研究通过超新星观测和对撞机实验结合,改进对CP-even标量与希格斯玻色子混合的约束,探测到极小的混合角和Yukawa耦合,揭示了暗物质相关的参数空间。

摘要:

超新星在探测MeV质量范围内弱耦合新粒子方面提供了最有力的探针,其中实验室实验失去灵敏度。在本工作中,我们推导了改进的超新星约束,针对与希格斯玻色子混合的CP-even标量,结合了更新的产生率计算,该计算将冷却限制提高了超过一个数量级,同时利用银河系511 keV正电子通量和低能型II-P超新星中的能量沉积,得到新的基于衰变的限制。这些限制可探测到混合角小至sinθ≈10⁻⁹,比现有对撞机限制低五个数量级。我们还扩展了分析到一个亲hadron标量模型,将Yukawa耦合限制到y_N≈10⁻¹⁰。我们的结果表明,天文物理和对撞机探针的结合可覆盖超过九个数量级的耦合范围,探测到由暗物质考虑所激发的参数空间的广阔区域。

英文摘要:

Supernovae provide among the most powerful probes of weakly-coupled new particles in the MeV mass range, where laboratory experiments lose sensitivity. In this work, we derive improved supernova constraints on CP-even scalars mixing with the Higgs boson, combining an updated production rate calculation, which improves the cooling bound by more than an order of magnitude, with new decay-based constraints from the galactic 511~keV positron flux and energy deposition in low-energy Type~II-P supernovae. Together, these constraints probe mixing angles as small as $\sinθ\sim 10^{-9}$, more than five orders of magnitude below existing collider bounds. We also extend our analysis to a hadrophilic scalar model, constraining Yukawa couplings down to $y_N \sim 10^{-10}$. Our results demonstrate that the combination of astrophysical and collider probes covers over nine orders of magnitude in coupling for these classes of models, probing a large region of parameter space motivated by dark matter considerations.

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。

↑