Hadronic phases and isospin amplitudes in D(B)→ππ and decays

1998/03/12 by J. -M. Gerard, Jean‐Marc Gérard, J. Pestieau +1 · 3 citations
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)00855-7

published as Phys.Lett. B436 (1998) 363-368 · 10pages,latex

arxiv created 1998/03/12 · openalex publication_date 1998/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Hadronic phase in ππ and K K channels are calculated a la Regge. At the D mass one finds δ_ππ ≈ π/3 and δ_{K K} ≈ -π/6 in good agreement with the CLEO data while at the B mass these angles are predicted to be, respectively, 11^∘ and -7^∘. With the hadronic phase e^i δ_{K K} taken into account, a quark diagram decomposition of the isospin invariant amplitudes in D → K K decays fits the data provided the exchange diagram contribution is about 1/3 of the tree level one.

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