4.7 Article

Mixing of partial waves near B*(B)over-bar* threshold in e+e- annihilation

Journal

PHYSICAL REVIEW D
Volume 87, Issue 9, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.094033

Keywords

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Funding

  1. DOE [DE-FG02-94ER40823]

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We consider the production of B*<(Bover bar>* meson pairs in e(+)e(-) annihilation near the threshold. The rescattering due to pion exchange between the mesons results in a mixing between three partial wave amplitudes: two P-wave amplitudes with the total spin of the meson pair S = 0 and S = 2 and an F-wave amplitude. The mixing due to pion exchange with a low momentum transfer is calculable up to c.m. energy E approximate to 15-20 MeV above the threshold. We find that the P - F mixing is numerically quite small in this energy range, while the mixing of the two P-wave amplitudes is rapidly changing with energy and can reach of order one at such low energies.

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