D+Kπ+π+: The weak vector current

P. C. Magalhães and M. R. Robilotta
Phys. Rev. D 92, 094005 – Published 3 November 2015

Abstract

Studies of D and B meson decays into hadrons have been used to test the standard model in the last 15 years. A heavy meson decay involves the combined effects of a primary weak vertex and subsequent hadronic final-state interactions, which determine the shapes of Dalitz plots. The fact that final products involve light mesons indicates that the QCD vacuum is an active part of the problem. This makes the description of these processes rather involved and, in spite of its importance, phenomenological analyses tend to rely on crude models. Our group produced, some time ago, a schematic calculation of the decay D+Kπ+π+, which provided a reasonable description of data. Its main assumption was the dominance of the weak vector current, which yields a nonfactorizable interaction. Here we refine that calculation by including the correct momentum dependence of the weak vertex and extending the energy ranges of ππ and Kπ subamplitudes present into the problem. These new features make the present treatment more realistic and bring theory closer to data.

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  • Received 23 April 2015

DOI:https://doi.org/10.1103/PhysRevD.92.094005

© 2015 American Physical Society

Authors & Affiliations

P. C. Magalhães* and M. R. Robilotta

  • Instituto de Física, Universidade de São Paulo, São Paulo, São Paulo, 05508-090, Brazil

  • *patricia@if.usp.br

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Vol. 92, Iss. 9 — 1 November 2015

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