Pregled bibliografske jedinice broj: 580551
Quark off-shell contributions to KL → γγ in a bound-state approach
Quark off-shell contributions to KL → γγ in a bound-state approach // Physics letters. B, 348 (1995), 1-2; 239-246 doi:10.1016/0370-2693(95)00100-Y (međunarodna recenzija, članak, znanstveni)
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Naslov
Quark off-shell contributions to KL → γγ in a bound-state approach
Autori
Kekez, Dalibor ; Klabučar, Dubravko ; Kumerički, Krešimir ; Picek, Ivica
Izvornik
Physics letters. B (0370-2693) 348
(1995), 1-2;
239-246
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
kaon ; kaon decays ; quark models ; off-shellness
Sažetak
We present a new piece of evidence in favour of the importance of the quark off-shellness in the kaon. The matrix elements of the flavour- changing operators for KL→γγ comply with the general behaviour of the matrix elements expected in the pairing bound-state model used here. The present calculation in essence agrees with previous chiral-quark results. The off- shell contribution turns out to be dominant (the model on-shell amplitude being at the 10% level). Compared with the chiral perturbation- theory approach, our off-shell contribution is an entirely new O(p4) {; ; \em direct-decay}; ; piece, whereas the non-diagonal magnetic-moment term belongs to the order O(p6).
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Dubravko Klabučar
(autor)
Dalibor Kekez
(autor)
Krešimir Kumerički
(autor)
Ivica Picek
(autor)
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
