Branching fractions and CP asymmetries of the quasitwobody decays in B_{s}→K^{0}(K^{¯ 0}) K^{±}π^{∓} within PQCD approach
Abstract
Motivated by the first untagged decaytimeintegrated amplitude analysis of B_{s}→K_{S}K^{∓}π^{±} decays performed by LHCb collaboration, where the decay amplitudes are modeled to contain the resonant contributions from intermediate resonances K^{∗}(892 ) , K_{0}^{∗}(1430 ) and K_{2}^{∗}(1430 ) , we comprehensively investigate the quasitwobody decays in the threebody processes [inlinegraphic not available: see fulltext], and calculate the branching fractions and the timedependent CP asymmetries within the perturbative QCD approach based on the k_{T} factorization. In the quasitwobody space region the calculated branching fractions with the considered intermediate resonances are in good agreement with the experimental results of LHCb by adopting proper K π pair wave function, describing the interaction between the kaon and pion in the K π pair. Furthermore, within the obtained branching fractions of the quasitwobody decays, we also calculate the branching fractions of the corresponding twobody decays, and the results consist with the LHCb measurements and the earlier studies within errors. For these considered decays, since the final states are not flavourspecific, the timedependent CP could be measured. We then calculate six CPviolation observables, which can be tested in the ongoing LHCb experiment.
 Publication:

European Physical Journal C
 Pub Date:
 June 2020
 DOI:
 10.1140/epjc/s1005202080944
 arXiv:
 arXiv:2005.02097
 Bibcode:
 2020EPJC...80..517Z
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 20 pages