INVESTIGADORES
GOMEZ DUMM Daniel Alberto
artículos
Título:
Long distance contributions to the K(L) ---> mu+ mu- decay width
Autor/es:
DANIEL GOMEZ DUMM; ANTONIO PICH
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
The American Physical Society
Referencias:
Lugar: Ridge, N. Y.; Año: 1998 vol. 80 p. 4633 - 4636
ISSN:
0031-9007
Resumen:
The dispersive two-photon contribution to the KL -> mu+ mu- decay amplitude is analyzed, using chiral perturbation theory techniques and large-NC considerations. A consistent description of the decays pi0 -> e+ e-, eta -> mu+ mu- , and KL -> mu+ mu- is obtained. As a by-product, one predicts B(eta -> e+ e-) = (5.8 +- 0.2) x 10^-9 and B(KL-> e+ e-) = (9.0 +- 0.4) x 10^-12.
