Abstract
We perform a comprehensive study of the impact of new-physics operators with different Lorentz structures on CP-violating observables involving the b → sμ + μ − transition. We examine the effects of new vector-axial vector (VA), scalar-pseudoscalar (SP) and tensor (T) interactions on the CP asymmetries in the branching ratios and forward-backward asymmetries of \( \overline B_s^0 \to {\mu^{+} }{\mu^{-} } \), \( \overline B_d^0 \to {X_{\text{s}}}{\mu^{+} }{\mu^{-} } \), \( \overline B_s^0 \to {\mu^{+} }{\mu^{-} }\gamma \), \( \overline B_d^0 \to \overline K {\mu^{+} }{\mu^{-} } \), and \( \overline B_d^0 \to {\overline K^* }{\mu^{+} }{\mu^{-} } \). In \( \overline B_d^0 \to {\overline K^* }{\mu^{+} }{\mu^{-} } \), we also explore the direct CP asymmetries in the longitudinal polarization fraction f L and the angular asymmetries \( A_T^{(2)} \) and A LT , as well as the triple-product CP asymmetries \( A_T^{\left( {im} \right)} \) and \( A_{LT}^{\left( {im} \right)} \). We find that, in almost all cases, the CP-violating observables are sensitive only to new physics which involves VA operators. The VA new physics may therefore be unambiguously identified by a combined analysis of future measurements of these CP-violating observables.
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ArXiv ePrint: 1103.5344
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Alok, A.K., Datta, A., Dighe, A. et al. New physics in b → sμ + μ −: CP-violating observables. J. High Energ. Phys. 2011, 122 (2011). https://doi.org/10.1007/JHEP11(2011)122
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DOI: https://doi.org/10.1007/JHEP11(2011)122