Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation
文献类型：期刊论文
| 作者 | Li, XY ; Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.; Liao, Y
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| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 1999 |
| 卷号 | 60期号:7页码:- |
| 关键词 | Background-field Method Kobayashi-maskawa Model Left-handed Currents Standard Model Gauge Theories Neutron Boson |
| ISSN号 | 0556-2821 |
| 英文摘要 | In the standard model (SM) of electroweak interactions, CP noninvariance arises from the nonzero phase in the CKM matrix. Its contribution to the quark electric dipole moment (EDM) vanishes surprisingly at two loop order. This makes the quark EDM extremely small in the SM. In this paper, we consider the two Higgs doublet extension of the SM and assume that CP noninvariance is still encoded in the CKM matrix. We calculate the charged Higgs boson contribution to the quark EDM which naively should be of order e G(F)(2)<(delta)over bar>(4 pi)(-4) m(u(d))m(t)(2)m(b)(2)m(H)(-2) for the up (down) quark with possible enhancement factors of tan(2) beta. Here <(delta)over bar> is the rephasing invariant of CP violation. However, contrary to the above naive expectation, we find that the charged Higgs boson contribution vanishes strictly at two loop order. We show explicitly how this comes about and explain how it is related to the general form of Yukawa couplings in a spontaneously broken gauge theory. [S0556-2821(99)01517-9]. |
| 学科主题 | Physics |
| WOS记录号 | WOS:000082868700009 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13093]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, XY,Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.,Liao, Y. Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation[J]. PHYSICAL REVIEW D,1999,60(7):-. |
| APA | Li, XY,Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.,&Liao, Y.(1999).Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation.PHYSICAL REVIEW D,60(7),-. |
| MLA | Li, XY,et al."Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation".PHYSICAL REVIEW D 60.7(1999):-. |
入库方式： OAI收割
来源：理论物理研究所
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