1998/03/06 by Dmitri Melikhov, D. Melikhov, N. Nikitin +2 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0370-2693(98)00407-9
published as Phys.Lett. B428 (1998) 171-178 · latex, 10 pp., 4 figures with epsfig.sty
arxiv created 1998/03/06 · openalex publication_date 1998/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The effects of possible right-handed weak hadronic currents in rare exclusive semileptonic decays B -> (K, K*) nu barnu are investigated using a lattice-constrained dispersion quark model for the calculation of the relevant mesonic form factors. The results obtained for the branching ratios and the missing energy spectra are presented and the sensitivity of various observables to long-distance physics is investigated. It is shown that the asymmetry of transversely polarized K*(T) mesons as well as the K / K*(T) production ratio are only slightly sensitive to long-distance contributions and mostly governed by the relative strength and phase of right-handed currents. In particular, within the Standard Model the production of right-handed K*(T) mesons turns out to be largely suppressed with respect to left-handed ones, thanks to the smallness of the final to initial meson mass ratio. Therefore, the measurement of produced right-handed K*(T) mesons in rare B -> K* nu barnu decays offers a very interesting tool to investigate right-handed weak hadronic currents.