Pismo uredniku
Long vs. short distance dispersive two-photon KL → µ+µ− amplitude
Jan O. Eeg
; Department of Physics, University of Oslo, Norway
Krešimir Kumerički
; Department of Physics, Faculty of Science, University of Zagreb, Croatia
Ivica Picek
; Department of Physics, Faculty of Science, University of Zagreb, Croatia
Sažetak
We report on the calculation of the two-loop electroweak, two-photon mediated short-distance dispersive KL → µ +µ − decay amplitude. QCD corrections change the sign of this contribution and reduce it by an order of magnitude. The resulting amplitude enables us to provide a constraint on the otherwise uncertain long-distance dispersive amplitude.
Ključne riječi
kaon decay; muon; dispersive amplitude; QCD corrections
Hrčak ID:
305367
URI
Datum izdavanja:
1.6.1999.
Posjeta: 124 *