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Spontaneous leptogenesis in Brans-Dicke cosmology
Chen, CY; Shen, YG; Feng B(冯波); Feng, B
2005
发表期刊HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
卷号29期号:11页码:1033-1040
通讯作者CAS, Shanghai Astron Observ, Shanghai 200030, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China ; CAS, Natl Astron Observ, Beijing 100012, Peoples R China ; CAS, Inst High Energy Phys, Beijing 100049, Peoples R China ; CAS, Inst Theoret Phys, Beijing 100080, Peoples R China ; Hangzhou Teachers Coll, Hangzhou 310018, Peoples R China
文章类型Article
摘要The role of the auxiliary scalar field phi of BD theory in baryon number asymmetry is discussed in this paper. We consider a derivative coupling of this gravitational scalar field to the baryon current J(B)(mu) or the current of the baryon number minus lepton number J(B-L)(mu), based on a series of works of R. Morganstern about the Brans-Dicke cosmology. We find that the spontaneous baryogenesis by this coupling is able to yield sufficient baryon asymmetry n(B)/s similar to 10(-10) provided the time of the grand unification is a little bit earlier. In addition, Davoudiasl et al have recently introduced a new type of interaction between the Ricci scalar R and the bayon current J(mu), partial derivative(mu), RJ(mu) and also proposed a mechanism for baryogenesis, the gravitational baryogenesis. However, the Einstein equation tells us that (R) over circle = 0 in the radiation-dominated epoch of the standard FRW cosmology. In this paper we reconsider the feasibility of having gravitational baryongenesis with such a form of interaction in radiation-filled BD cosmology. We show that (R) over circle does not vanish in this case and the required baryon number asymmetry can also be achieved.
关键词leptogenesis scalar coupling Brans-Dicke cosmology
学科领域Physics
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语种英语
WOS研究方向Physics
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000233323300002
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238925
专题理论物理室
作者单位中国科学院高能物理研究所
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Chen, CY,Shen, YG,Feng B,et al. Spontaneous leptogenesis in Brans-Dicke cosmology[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2005,29(11):1033-1040.
APA Chen, CY,Shen, YG,冯波,&Feng, B.(2005).Spontaneous leptogenesis in Brans-Dicke cosmology.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,29(11),1033-1040.
MLA Chen, CY,et al."Spontaneous leptogenesis in Brans-Dicke cosmology".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 29.11(2005):1033-1040.
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