Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-21
Phys.Rev.D82:034013,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 6 figures, revtex4; two figures omitted, a few references added; version accepted for publication in Physical Review
Scientific paper
10.1103/PhysRevD.82.034013
The branching ratio and other observables for the rare flavour-changing neutral current decay \bar B_d^0 -> \bar K*0 (-> K- pi+) e+ e- are studied below the \bar{c} c threshold. The total amplitude for this decay includes the term coming from the standard model effective Hamiltonian and the term generated by the processes \bar B_d^0 -> \bar K*0 (-> K- pi+) V with intermediate low-lying vector resonances V = rho(770), omega(782), phi(1020) decaying into the e+ e- pair. The resonance contribution to the branching ratio, polarization fractions of the K* meson and coefficients in the angular distribution is calculated. The influence of the resonances on the integrated observables in the region of electron-positron invariant mass up to 1 GeV is studied in view of the planned measurements of the photon polarization at the LHCb.
Korchin Alexander Yu.
Kovalchuk Vladimir A.
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