Angular Distribution and CP Asymmetries in the Decays B̄ → K − π + e − e + and B̄ → π − π + e − e +

The short-distance Hamiltonian describing b → s(d)e−e+ in the standard model is used to obtain the decay spectrum of B̄ → K−π+e−e+ and B̄ → π−π+e−e+, assuming the Kπ and ππ systems to be the decay products of K∗ and ρ respectively. Specific features calculated are (i) angular distribution of K− (or π−) in the K−π+ (or π−π+) centre-of-mass (c.m.) frame; (ii) angular ∗E-mail address: [email protected] †E-mail address: [email protected] ‡E-mail address: [email protected] §E-mail address: [email protected] 1 distribution of e− in the e−e+ c.m. frame; and (iii) the correlation between the meson and lepton planes. We also derive CP-violating observables obtained by combining the above decays with the conjugate processes B → K+π−e−e+ and B → π−π+e−e+. PACS number(s): 11.30.Er, 13.20.He Typeset using REVTEX 2