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

https://hrcak.srce.hr/305367

Datum izdavanja:

1.6.1999.

Podaci na drugim jezicima: hrvatski

Posjeta: 347 *