Thermal emission rates and mean free paths of photons in a color-flavorlocked (CFL) phase of quark matter at high densities and moderate temperaturesare evaluated. Our calculations are based on a low-energy effective theory forCFL matter describing Goldstone boson excitations and their electromagnetic aswell as strong interactions. In-medium coupling strengths of vector mesons arefound to be smaller than in vacuum. As a consequence of in-medium modified piondispersion relations, novel processes such as pi+ pi- -> gamma and gamma -> pi+pi- become possible. The total photon emissivity is found to be very large,exceeding contributions from thermal e+ e- annihilation above temperatures ofabout 5 MeV. At the same time, the corresponding mean free paths become verysmall. Our results imply that the photon flux from the surface of a(hypothetical) CFL star in its early hot stages saturates the black-body limit.Estimates for the early thermal evolution of the star are also presented.
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机译：评估了夸克物质在高密度和中等温度下的色香味（CFL）相中的热发射率和光子的平均自由程。我们的计算基于对CFL物质的低能效理论，该理论描述了Goldstone玻色子激发及其电磁以及强相互作用。发现矢量介子的中等耦合强度小于真空中。由于中等程度的介子分散关系的结果，诸如pi + pi->γ和γ-> pi + pi-的新过程成为可能。发现总的光子发射率非常大，超过了大约5 MeV的温度下的热e + contributions灭产生的贡献。同时，相应的平均自由程变得非常小。我们的结果表明，（假设的）CFL恒星在其早期高温阶段的光子通量使黑体极限达到饱和，并给出了恒星早期热演化的估计。
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