Contribution of low-lying vector resonances to polarization observables in \bar B_d^0 -> \bar K*0 e+ e- decay

Abstract

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.

14 pages, 6 figures, revtex4; two figures omitted, a few references added; version accepted for publication in Physical Review D

References in corpus (36)

• Weak Decays Beyond Leading Logarithms
• Symmetry-breaking corrections to heavy-to-light B meson form factors at large recoil
• B_{d,s}->rho, omega, K*, phi Decay Form Factors from Light-Cone Sum Rules Revisited
• Symmetries and Asymmetries of B -> K* mu+ mu- Decays in the Standard Model and Beyond
• The 4-loop quark mass anomalous dimension and the invariant quark mass
• Systematic approach to exclusive B ->V l^+l^-, V gamma decays
• The three loop relation between the \bar {MS} and the pole quark masses
• A Comparative Study of the Decays $B\to (K,K^{\ast }){\ell }^{+}{\ell }^{-}$ in Standard Model and Supersymmetric Theories
• Measurement of the Differential Branching Fraction and Forward-Backword Asymmetry for B->K(*)l+l-
• Quark Mass Anomalous Dimension to alpha_s**4
• Heavy-to-Light Form Factors in the Final Hadron Large Energy Limit of QCD
• Improved Model-Independent Analysis of Semileptonic and Radiative Rare B Decays
• Probing New Physics Via the Transverse Amplitudes of B0-> K*0(-> K- pi+) l+l- at Large Recoil
• The Radiative Decays B -> V gamma at Next-to-Leading Order in QCD
• Mixing-induced CP Asymmetries in Radiative B Decays in and beyond the Standard Model
• Short Distance Mass of a Heavy Quark at Order α_s^3
• CP Asymmetries in bar B -> bar K* (-> bar K pi) l+ l- and Untagged bar B_s,B_s -> phi (-> K+ K-) l+ l- Decays at NLO
• New observables in the decay mode anti-B --> anti-K*0 l+ l-
• Branching Ratios for $B\to K^{\ast }\gamma$ and $B\to \rho \gamma$ Decays in Next-to-Leading Order in the Large Eneregy Effective Theory
• Study of the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^0$ in the energy region $\sqrt[]{s}$ below 0.98 GeV
• Angular Distribution and CP Asymmetries in the Decays B->K^-pi^+e^-e^+ and B->pi^-pi^+e^-e^+
• Direct CP, Lepton Flavor and Isospin Asymmetries in the Decays B->K(*)l+l-
• The photon polarization in B -> X gamma in the standard model
• Measuring the Photon Helicity in Radiative B Decays
• Probing for New Physics in Polarized ${\Lambda }_b$ decays at the Z
• Light-cone sum rules in soft-collinear effective theory
• Photon polarization in radiative B decays
• Probing right-handed currents in B -> K* l+ l- transitions
• SCET sum rules for B->P and B->V transition form factors
• Extracting and using photon polarization information in radiative B decays
• Mixing-Induced CP Violation in B -> P_1 P_2 gamma in Search of Clean New Physics Signals
• Photon polarization from helicity suppression in radiative decays of polarized Lambda_b to spin-3/2 baryons
• Azimuthal Angle Distribution in $B\to K^{\ast }(\to K\pi ){\ell }^{+}{\ell }^{-}$ at low invariant $m_{{\ell }^{+}{\ell }^{-}}$ Region
• Photon polarization with anomalous right-handed top couplings in $B\to K_{res}\gamma$
• On the photon polarization in radiative B -> phi K gamma decay
• Stokes Vector of Photon in the Decays B^0 -> rho^0 gamma and B^0 -> K^* gamma

Cited by in corpus (3)

• Angular analysis of the $B^0\to K^{\ast 0}{e}^{+}{e}^{-}$ decay in the low-$q^2$ region
• New Physics Effects and Hadronic Form Factor Uncertainties in B -> K^* l^+ l^-
• Contribution of vector resonances to the {\bar B}_d^0 -> {\bar K}^{*0} mu^+ mu^- decay