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arXiv 1205.6940astro-ph.COastro-ph.SRhep-phnucl-th
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来自冷却致密星的轴子:对断裂过程

Axions from cooling compact stars: pair-breaking processes

Jochen Keller, Armen Sedrakian

摘要:

中子星一旦在超新星爆炸中形成,在其生命的最初10^4-10^5年期间,通过中微子的释放迅速冷却。本文计算了在正常-超流相变的临界温度T_c以下,恒星重子组分的轴子发射率。轴子的产生是由一个电荷中性的弱过程驱动的,与库珀对断裂和复合有关。轴子冷却不能掩盖中微子冷却的要求使轴子衰变常数f_a的下限大于6 10^9 T_{c9} ^{-1} GeV,其中T_{c9} = T_c/10^9 K。这转化为轴子质量的上限m_a < 10^{-3} T_{c9} eV。

英文摘要:

Once formed in a supernova explosion, a neutron star cools rapidly via neutrino emission during the first 10^4-10^5 yr of its life-time. Here we compute the axion emission rate from baryonic components of a star at temperatures below their respective critical temperatures T_c for normal-superfluid phase transition. The axion production is driven by a charge neutral weak process, associated with Cooper pair breaking and recombination. The requirement that the axion cooling does not overshadow the neutrino cooling puts a lower bound on the axion decay constant f_a > 6 10^9 T_{c9}^{-1} GeV, with T_{c9} = T_c/10^9 K. This translates into a upper bound on the axion mass m_a < 10^{-3} T_{c9} eV.

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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