摘要
In this study,we investigate the possibilities of generating baryon number asymmetry under thermal equilibrium within the frameworks of teleparallel and symmetric teleparallel gravities.Through the derivative couplings of the torsion scalar and the non-metricity scalar to baryons,baryon number asymmetry is produced in the radiation dominated epoch.For gravitational baryogenesis mechanisms in these two frameworks,the produced baryon-to-entropy ratio is too small to be consistent with observations.However,the gravitational leptogenesis models within both frameworks have the potential to explain the observed baryon-antibaryon asymmetry.
作者
李明哲
牟一岑
饶浩民
赵德浩
Mingzhe Li;Yicen Mou;Haomin Rao;Dehao Zhao(Interdisciplinary Center for Theoretical Study,University of Science and Technology of China,Hefei 230026,China;Peng Huanwu Center for Fundamental Theory,Hefei 230026,China)
基金
Supported by NSFC(12075231,11653002,12047502,11947301)。