Angular analysis of B --> V (--> P_1 P_2) l^+ l^- decays

Details Angular analysis of B --> V (--> P_1 P_2) l^+ l^- decays Angular analysis of B --> V (--> P_1 P_2) l^+ l^- decays

2011-05-13

arxiv.org/abs/1105.2659v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures; Talk given at Discrete '10: Symposium on Prospects in the Physics of Discrete Symmetries, Rome, Italy, 6-1

Scientific paper

The angular analysis of exclusive rare B-meson decays via intermediate vector mesons V into 4-body final states of two pseudo-scalars P_1, P_2 and a pair of light leptons l = e, mu offers a large set of observables. They can be used to test the electroweak short-distance couplings in the Standard Model and to search for New Physics. The two kinematic regions of low and high dilepton mass depend on short-distance physics in complementary ways and can be expanded in powers of Lambda_QCD/m_b. These expansions guide towards suitable combinations of observables allowing to i) reduce the hadronic uncertainties in the extraction of the short-distance couplings or ii) test the lattice QCD (B -> V) form factors in short-distance independent combinations. Several such possibilities of CP-averaged and CP-asymmetric (T-even and T-odd) quantities are presented for B_d^0 --> K^*0 (-> K pi) l^+ l^- and time-integrated CP-asymmetries without tagging for (anti-B_s, B_s) --> phi (--> K^- K^+) l^+ l^- decays in view of the latest B-factory and CDF results and the forthcoming LHCb measurements.

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