Knowledge Management System of Institute of Theoretical Physics, CAS
Liao, Y; Li, XY; Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China. | |
Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation | |
Source Publication | PHYSICAL REVIEW D |
Keyword | Background-field Method Kobayashi-maskawa Model Left-handed Currents Standard Model Gauge Theories Neutron Boson |
Abstract | 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]. |
1999 | |
ISSN | 0556-2821 |
Volume | 60Issue:7Pages:- |
Subject Area | Physics |
Indexed By | SCI |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itp.ac.cn/handle/311006/13093 |
Collection | 理论物理所科研产出_SCI论文 |
Corresponding Author | Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China. |
Recommended Citation GB/T 7714 | Liao, Y,Li, XY,Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.. Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation[J]. PHYSICAL REVIEW D,1999,60(7):-. |
APA | Liao, Y,Li, XY,&Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China..(1999).Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation.PHYSICAL REVIEW D,60(7),-. |
MLA | Liao, Y,et al."Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation".PHYSICAL REVIEW D 60.7(1999):-. |
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