About one long-range contribution to K+ -> pi+ l+ l- decays

Details About one long-range contribution to K+ -> pi+ l+ l- decays About one long-range contribution to K+ -> pi+ l+ l- decays

1999-04-07

arxiv.org/abs/hep-ph/9904265v1

Phys.Rev. D61 (2000) 073010

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, RevTeX, epsf.sty, 2 embedded figures

Scientific paper

10.1103/PhysRevD.61.073010

We investigate the mechanism of K+ -> pi+ l+ l- (l= e, mu) decays in which a virtual photon is emitted either from the incoming K+ or the outgoing pi+. We point out some inconsistencies with and between two previous calculations, discuss the possible experimental inputs, and estimate the branching fractions. This mechanism alone fails to explain the existing experimental data by more than one order-of-magnitude. But it may show itself by its interference with the leading long-range mechanism dominated by the a_1^+ and rho^0 mesons.

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