标题： 引力电荷产生 显示英文标题

标题： Gravitational charge production

摘要： 洗入重子生成是一种吸引人的机制，用于产生宇宙的重子不对称性。 它将右手中微子相互作用视为旁观过程，与电弱瞬子处于同等地位，这些过程将热等离子体中的原始电荷不对称性重新加工成重子减去轻子的不对称性。 这些原始电荷的来源必须由极高能量下的新$CP$破坏动力学来解释。 在本文中，我们提出了一种这样的电荷生成场景，与早期的建议不同，该场景主要依赖于引力部分的新相互作用。 我们指出，在再加热期间，守恒电流与里奇标量散度的耦合可以导致等离子体中出现非零的有效化学势，这些化学势与适当的电荷破坏相互作用相结合，可以导致原始电荷不对称性的产生。 引力电荷生成是对引力重子生成概念的重要推广。 我们提供了一个通用且最小实现的详细分析，该实现与暴胀一致，并表明它可以成功解释宇宙的重子不对称性。 显示英文摘要

摘要： Wash-in leptogenesis is an attractive mechanism to produce the baryon asymmetry of the Universe. It treats right-handed-neutrino interactions as spectator processes, on the same footing as electroweak sphalerons, that reprocess primordial charge asymmetries in the thermal plasma into a baryon-minus-lepton asymmetry. The origin of these primordial charges must be accounted for by new $CP$-violating dynamics at very high energies. In this paper, we propose such a scenario of chargegenesis that, unlike earlier proposals, primarily relies on new interactions in the gravitational sector. We point out that a coupling of a conserved current to the divergence of the Ricci scalar during reheating can lead to nonzero effective chemical potentials in the plasma that, together with a suitable charge-violating interaction, can result in the production of a primordial charge asymmetry. Gravitational chargegenesis represents a substantial generalization of the idea of gravitational baryogenesis. We provide a detailed analysis of a generic and minimal realization that is consistent with inflation and show that it can successfully explain the baryon asymmetry of the Universe.