论文标题
来自中子星和重力波比较的夸克物质的斧头伽马射线签名
Axion Gamma-Ray Signatures from Quark Matter in Neutron Stars and Gravitational Wave Comparisons
论文作者
论文摘要
我们提出了一个理论模型，用于在夸克物质的QCD阶段检测中子恒星的轴。轴将是由涉及gluons的Quark-Antiquark对$ u \ u \ bar {u} $或$ d \ bar {d} $的。调用QCD的手性异常和自发损坏的对称性，以解释轴突电流的不保守。从耦合形式因素中，可以得出轴轴的发射$ε_a$，可以从中确定通量。我们预测一个光子通量，可以通过费米LAT检测到，并限制QCD质量$ m_a $。在此模型中，在2光子顶点中斧头向γ射线衰减。我们可以从理论发射率中确定预期的通量。 Fermi大面积望远镜（Fermi Lat）的灵敏度曲线允许中子星的轴向质量约束，低至$ M_A \ le 10^{ - 14} $ EV 95 $ \％c.l. $。因此，对于距离为100 kpc的中子恒星，可以在伽马射线中检测到轴轴。可以从NS-NS合并中发出Ligo GWS 170817的信号，该合并的上限为$ M_A \ le 10^{ - 10} $ ev。
We present a theoretical model for detecting axions from neutron stars in a QCD phase of quark matter. The axions would be produced from a quark-antiquark pair $u\bar{u}$ or $d\bar{d}$, in loop(s) involving gluons. The chiral anomaly of QCD and the spontaneously broken symmetry are invoked to explain the non-conservation of the axion current. From the coupling form factors, the axion emissivities $ε_a$ can be derived, from which fluxes can be determined. We predict a photon flux, which may be detectable by Fermi LAT, and limits on the QCD mass $m_a$. In this model, axions decay to gamma rays in a 2-photon vertex. We may determine the expected fluxes from the theoretical emissivity. The sensitivity curve from the Fermi Large Area Telescope (Fermi LAT) would allow axion mass constraints for neutron stars as low as $m_a \le 10^{-14}$ eV 95$\% C.L.$. Axions could thus be detectable in gamma rays for neutron stars as distant as 100 kpc. A signal from LIGO GWS 170817 could be placed from the NS-NS merger, which gives an upper limit of $m_a \le 10^{-10}$ eV.
