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AY Korchin, VA Kovalchuk - Physical Review D—Particles, Fields, Gravitation …, 2010 - APS
AY Korchin, VA Kovalchuk
Physical Review D—Particles, Fields, Gravitation, and Cosmology, 2010•APSThe branching ratio and other observables for the rare flavor-changing neutral current decay
B¯ d 0→ K¯* 0 (→ K-π+) e+ e-are studied below the 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 B¯ d 0→ K¯* 0 (→ K-π+) V with intermediate low-lying
vector resonances V= ρ (770), ω (782), ϕ (1020) decaying into the e+ e-pair. The resonance
contribution to the branching ratio, polarization fractions of the K* meson, and coefficients in …
B¯ d 0→ K¯* 0 (→ K-π+) e+ e-are studied below the 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 B¯ d 0→ K¯* 0 (→ K-π+) V with intermediate low-lying
vector resonances V= ρ (770), ω (782), ϕ (1020) decaying into the e+ e-pair. The resonance
contribution to the branching ratio, polarization fractions of the K* meson, and coefficients in …
The branching ratio and other observables for the rare flavor-changing neutral current decay are studied below the threshold. The total amplitude for this decay includes the term coming from the standard model effective Hamiltonian and the term generated by the processes with intermediate low-lying vector resonances , , decaying into the pair. The resonance contribution to the branching ratio, polarization fractions of the 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.
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