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arXiv 2203.08663hep-phastro-ph.HE
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作为光子双透镜的中子星:限制向类轴子粒子(ALPs)的共振转化

Neutron stars as photon double-lenses: constraining resonant conversion into ALPs

Kyrylo Bondarenko, Alexey Boyarsky, Josef Pradler, Anastasia Sokolenko

AI总结:

本研究提出利用磁星附近自由电子与辐射场对光子质量的相反贡献形成的共振条件,通过磁星SGR J1745-2900验证可提升轴子-光子耦合限制,为类轴子粒子搜寻提供新途径。

摘要:

轴子-光子转化是探测与光子存在耦合的类轴子粒子的核心机制。我们指出,在具有强磁场的中子星(即磁星)附近,有效光子质量会受到自由电子和辐射场的贡献,二者大小相当但符号相反。这会产生与能量相关的转化共振条件,该条件对任意轻质量轴子均可满足,且可在使用已探测到射电成分的系统时加以利用。以磁星SGR J1745-2900作为示例源,我们证明对于$m_a \lesssim 10^{-6}\\\\,\rm eV$的轴子,可获得对$|g_{a\gamma}| \sim 10^{-12}\\\\,\rm{GeV^{-1}}$或更优的灵敏度,有望在较宽的质量范围内将当前轴子-光子耦合的限制提升一个数量级以上。随着对磁星磁层物理条件的认识不断深入,该方法有望在类轴子粒子搜寻中成为ALPS-II和IAXO等未来实验的有力竞争者。

英文摘要:

Axion-photon conversion is a prime mechanism to detect axion-like particles that share a coupling to the photon. We point out that in the vicinity of neutron stars with strong magnetic fields, magnetars, the effective photon mass receives comparable but opposite contributions from free electrons and the radiation field. This leads to an energy-dependent resonance condition for conversion that can be met for arbitrary light axions and leveraged when using systems with detected radio component. Using the magnetar SGR J1745-2900 as an exemplary source, we demonstrate that sensitivity to $|g_{aγ}| \sim 10^{-12}\,\rm{GeV^{-1}}$ or better can be gained for $m_a \lesssim 10^{-6}\,\rm eV$, with the potential to improve current constraints on the axion-photon coupling by more than one order of magnitude over a broad mass range. With growing insights into the physical conditions of magnetospheres of magnetars, the method hosts the potential to become a serious competitor to future experiments such as ALPS-II and IAXO in the search for axion-like particles.

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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