论文标题
无质量深色光子的热产生
Thermal Production of Massless Dark Photons
论文作者
论文摘要
深色光子由几个动机良好的标准模型扩展和紫外线完成预测。在这里考虑了描述无质量暗光子与所有标准模型颗粒的相互作用的尺寸六算子的最通用的场理论。这捕获了一个通用模型的预测，该模型以足够低的能量以这种类型的向量玻色子为特征。在这种框架中，深色光子的热生产速率是按照领先顺序计算的，包括所有SM颗粒的贡献。还计算了深色光子的相应宇宙学产率及其对有效中微子数量的贡献。这些预测满足当前的观察界限，并将通过未来的测量进行测试。
A dark photon is predicted by several well-motivated Standard Model extensions and UV completions. Here the most general effective field theory up to dimension-six operators describing the interactions of a massless dark photon with all Standard Model particles is considered. This captures the predictions of a generic model featuring this type of vector boson at sufficiently low energies. In such framework the thermal production rate of dark photons is computed at leading order, including the contributions of all SM particles. The corresponding cosmological yield of the dark photon and its contribution to the effective number of neutrinos are also calculated. These predictions satisfy the current observational bounds and will be tested by future measurements.
