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Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model

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Abstract

In the aligned two-Higgs-doublet model, the alignment of Yukawa matrices in flavour space guarantees the absence of tree-level flavour-changing neutral currents, while allowing at the same time for new sources of CP violation, implying potentially large effects in many low-energy processes. In this work we study the constraints from exclusive radiative B → V γ decays, where V denotes a light vector meson. The current experimental data on the CP-averaged branching ratios and the direct CP and isospin asymmetries are analyzed. It is found that, while the branching ratios and direct CP asymmetries do not constrain the parameter space much further compared to the inclusive B → X s,d γ decays, complementary constraints can be obtained from the isospin asymmetries Δ(K*γ) and Δ(ργ). In addition, correlations between the various observables in exclusive B → V γ and inclusive B → X s,d γ decays are investigated in detail, and predictions are made for several so far unmeasured observables.

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Authors and Affiliations

  1. Institut für Physik, Technische Universität Dortmund, D-44221, Dortmund, Germany

    Martin Jung

  2. Department of Physics, Henan Normal University, Xinxiang, Henan, 453007, P.R. China

    Xin-Qiang Li

  3. IFIC, Universitat de València-CSIC, Apt. Correus 22085, E-46071, València, Spain

    Xin-Qiang Li & Antonio Pich

  4. Physik Department and Institute for Advanced Study, Technische Universität München, D-85748, Garching, Germany

    Antonio Pich

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  1. Martin Jung
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  2. Xin-Qiang Li
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  3. Antonio Pich
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Correspondence to Xin-Qiang Li.

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ArXiv ePrint: 1208.1251

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Jung, M., Li, XQ. & Pich, A. Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model. J. High Energ. Phys. 2012, 63 (2012). https://doi.org/10.1007/JHEP10(2012)063

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