F(R) gravity in the early Universe: electroweak phase transition and chameleon mechanism

作     者：Taishi Katsuragawa Shinya Matsuzaki Eibun Senaha 

作者机构：Institute of AstrophysicsCentral China Normal UniversityWuhan 430079China Center for Theoretical Physics and College of PhysicsJilin UniversityChangchun130012China Center for Theoretical Physics of the UniverseInstitute for Basic Science (IBS)Daejeon 34051Korea 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2019年第43卷第10期

页      面：86-98页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by International Postdoctoral Exchange Fellowship Program at Central China Normal University Project funded by China Postdoctoral Science Foundation(2018M632895) supported in part by the JSPS Grant-in-Aid for Young Scientists(B)(15K17645) National Science Foundation of China(NSFC)(11747308) the Seeds Funding of Jilin University.E.S.is supported by IBS under the project code,IBS-R018-D1 

主　　题：modified gravity beyond standard model thermal field theory 

摘      要：It is widely believed that the screening mechanism is an essential feature for the modified gravity theory. Although this mechanism has been examined thoroughly in the past decade, their analyses are based on a conventional fluid prescription for the matter-sector configuration. In this paper, we demonstrate a new formulation of the chameleon mechanism in F(R) gravity theory, to shed light on quantum-field theoretical effects on the chameleon mechanism as well as the related scalaron physics, induced by the matter sector. We show a possibility that the chameleon mechanism is absent in the early Universe based on a scale-invariant-extended scenario beyond the standard model of particle physics, in which a realistic electroweak phase transition, yielding the right amount of baryon asymmetry of Universe today, simultaneously breaks the scale invariance in the early Universe. We also briefly discuss the oscillation of the scalaron field and indirect generation of non-tensorial gravitational waves induced by the electroweak phase transition.