Pregled bibliografske jedinice broj: 16853
On the instanton-induced portion of the nucleon strangeness
On the instanton-induced portion of the nucleon strangeness // European physical journal C, 9 (1999), 4; 589-599 doi:10.1007/s100529900056 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 16853 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
On the instanton-induced portion of the nucleon strangeness
Autori
Klabučar, Dubravko ; Kumerički, Krešimir ; Melić, Blaženka ; Picek, Ivica
Izvornik
European physical journal C (1434-6044) 9
(1999), 4;
589-599
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
nucleon; instantons; strangeness; MIT-bag model
Sažetak
We calculate the instanton contribution to the proton strangeness in the MIT bag enriched by the presence of a dilute instanton liquid. The evaluation is based on expressing the nucleon matrix elements of bilinear strange quark operators in terms of a model valence nucleon state and interactions producing quark-antiquark fluctuations on top of that valence state. Our method combines the usage of the evolution operator containing a strangeness source, and the Feynman-Hellmann theorem. It enables one to evaluate the strangeness in different Lorentz channels in, essentially, the same way. Only the scalar channel is found to be affected by the interaction induced by the random instanton liquid.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Dubravko Klabučar
(autor)
Krešimir Kumerički
(autor)
Ivica Picek
(autor)
Blaženka Melić
(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
