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题名: Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation
作者: Liao, Y ;  Li, XY
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
学科分类: Physics
通讯作者: Liao, Y , Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China.
部门归属: Tsing Hua Univ, Dept Modern Appl Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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].
收录类别: SCI
WOS记录号: WOS:000082868700009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13093
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Liao, Y,Li, XY. Vanishing contribution to quark electric dipole moment in the 2HD model with CKM CP violation[J]. PHYSICAL REVIEW D,1999,60(7):-.
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