Short- and long-distance contributions to the rare decay K_L-->mu+ mu-

Details Short- and long-distance contributions to the rare decay K_L-->mu+ mu- Short- and long-distance contributions to the rare decay K_L-->mu+ mu-

1998-10-29

arxiv.org/abs/hep-ph/9810523v1

Nucl.Phys.Proc.Suppl. 74 (1999) 186-189

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, talk given at the Euroconference QCD 98, Montpellier, France, July 1998

Scientific paper

10.1016/S0920-5632(99)00159-0

The interplay between short- and long-distance contributions to the K_L-->mu+
mu- decay amplitude is analyzed. The long-distance piece is estimated using
chiral perturbation theory techniques and large-N_C considerations, leading to
a consistent description of the pi^0-->e+ e-, eta-->mu+ mu- and K_L-->mu+ mu-
branching ratios.

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