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题名: Exclusive radiative B-meson decays within minimal flavor-violating two-Higgs-doublet models
作者: Li, XQ;  Yang, YD;  Yuan, XB
刊名: PHYSICAL REVIEW D
出版日期: 2014
卷号: 89, 期号:5, 页码:54024
关键词: TO-LEADING ORDER ;  K-ASTERISK-GAMMA ;  STANDARD MODEL ;  QCD CORRECTIONS ;  CP-VIOLATION ;  BRANCHING RATIOS ;  PENGUIN DECAYS ;  ATLAS DETECTOR ;  HIGGS-BOSON ;  CKM MATRIX
学科分类: Physics
DOI: 10.1103/PhysRevD.89.054024
通讯作者: Li, XQ (reprint author), Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.
部门归属: [Li, Xin-Qiang
英文摘要: In the "Higgs basis" for a generic two-Higgs-doublet model, only one doublet gets a nonzero vacuum expectation value and, under the criterion of minimal flavor violation, the other one is fixed to be either color-singlet or color-octet, referred to, respectively, as the type-III and type-C models. Both of them can naturally avoid large FCNC transitions and provide very interesting phenomena in some low-energy processes. In this paper, we study their effects on exclusive radiative B-meson decays due to the exchange of colorless or colored charged Higgs. It is found that while constraints from the branching ratios are slightly weaker than the ones from the inclusive B -> X-s gamma decay, the isospin asymmetries in exclusive decays provide very complementary bounds on the model parameters. As the two models predict similar corrections to the dipole coefficient C-7(eff), but similar magnitudes with opposite signs to C-8(eff), the branching ratios cannot discriminate the two models, and we have to resort to the direct CP and isospin asymmetries of b -> s processes, which are more sensitive to C-8(eff). Due to the CKM factors vertical bar lambda((d))(u)vertical bar similar to vertical bar lambda((d))(t)vertical bar, the terms proportional to lambda((d))(u) make the observables of b -> d processes exhibit a different dependence on the possible new physics phase. In addition, correlations between the various observables in the exclusive B -> V gamma and the inclusive B -> X-s,X-d gamma decays are investigated, which could provide further insights into the models with more precise experimental measurements and theoretical predictions for these decays.
资助者: National Natural Science Foundation of China (NSFC) [11005032, 11075059, 11225523, 11221504]; Specialized Research Fund for the Doctoral Program of Higher Education of China [20104104120001]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry; CCNU-QLPL Innovation Fund [QLPL2011P01]; Central China Normal University
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000334304000001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15805
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Recommended Citation:
Li, XQ,Yang, YD,Yuan, XB. Exclusive radiative B-meson decays within minimal flavor-violating two-Higgs-doublet models[J]. PHYSICAL REVIEW D,2014,89(5):54024.
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