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arXiv 2602.07939nucl-thastro-ph.HEcond-mat.str-el
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超子谜题的新解决方案:量子多体效应

New solution to the hyperon puzzle of neutron stars: Quantum many-body effects

University of Science and Technology of China(中国科学技术大学)

Hao-Fu Zhu, Guo-Zhu Liu, Xufen Wu, Ye-Fei Yuan

AI总结:

本文提出利用Dyson-Schwinger方程方法,考虑强核子-介子相互作用的量子多体效应,以解决中子星超子谜题,得出最大超子星质量约为2.59 M_⊙,解释观测到的高质量中子星。

摘要:

超子谜题指的是 reconciling 超子存在于中子星核心的存在与观测到的高质量中子星之间的挑战。最近发现的PSR J0952-0607(2.35±0.17 M_⊙)加剧了这一挑战。现有解决方案无法达到如此高的质量,且常常预测出与观测不符的异常快速冷却。在这里,我们提出了解决超子谜题的新方法。利用Dyson-Schwinger方程方法,我们将强核子-介子相互作用引起的量子多体效应纳入冷核物质的状态方程中,并发现其足够刚性以支持最大超子星质量M_max≈2.59 M_⊙,可以解释所有观测到的高质量中子星。所得到的质子和超子分数显著较低,因此核子和超子的直接Urca过程被显著抑制。结果是普通中子星通常不会出现快速冷却。

英文摘要:

The hyperon puzzle refers to the challenge of reconciling the existence of hyperons in neutron star cores and the observed high masses of neutron stars. The recent discovery of PSR J0952-0607 ($2.35\pm0.17 M_{\odot}$) has intensified this challenge. Existing solutions fail to achieve such a high mass, and often predict unrealistically fast cooling that is at odds with observations. Here, we propose a novel solution to the hyperon puzzle. Using the Dyson-Schwinger equation approach, we incorporate the quantum many-body effects caused by strong baryon-meson interactions into the equation of state for cold baryonic matter and find it stiff enough to support a maximum hyperon-star mass of $M_{\mathrm{max}} \approx 2.59 M_{\odot}$, which can explain all the observed high neutron-star masses. The resulting proton and hyperon fractions are remarkably low, thus the nucleonic and hyperonic direct Urca processes are significantly suppressed. As a result, fast cooling typically does not occur in ordinary neutron stars.

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。

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