Spontaneous leptogenesis in Brans-Dicke cosmology
文献类型：期刊论文
| 作者 | Chen, CY; Shen, YG; Feng B(冯波); Feng, B |
| 刊名 | HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
 |
| 出版日期 | 2005 |
| 卷号 | 29期号:11页码:1033-1040 |
| 关键词 | leptogenesis scalar coupling Brans-Dicke cosmology |
| 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 |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000233323300002 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/238925]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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