Pregled bibliografske jedinice broj: 14632
On the dispersive two-photon K_L -> mu^+ mu^- amplitude
On the dispersive two-photon K_L -> mu^+ mu^- amplitude // European physical journal C, 1 (1998), 3-4; 531-537 doi:10.1007/s100520050102 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 14632 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the dispersive two-photon K_L -> mu^+ mu^- amplitude
Autori
Eeg, Jan O. ; Kumerički, Krešimir ; Picek, Ivica
Izvornik
European physical journal C (1434-6044) 1
(1998), 3-4;
531-537
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
kaon decay; muon; dispersive amplitude; QCD corrections
Sažetak
We present a full account of the two-loop electroweak, two-photon mediated short-distance dispersive K_L -> mu^+ mu^- decay amplitude. QCD corrections change the sign of this amplitude and reduce it by an order of magnitude. Thus, the QCD-corrected two-loop amplitude represents only a small fraction (with the central value of 5 %) of the one-loop weak short-distance contribution, and has the same sign. In combination with a recent measurement, the standard-model prediction of the short-distance amplitude, completed in this paper, provides a constraint on the otherwise uncertain long-distance dispersive amplitude.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
