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Titolo:
An estimate of the K-0-K-0 mixing amplitude
Autore:
Becirevic, D; Meloni, D; Retico, A;
Indirizzi:
Univ Rome La Sapienza, Dipartimento Fis, I-00185 Rome, Italy Univ Rome La Sapienza Rome Italy I-00185 imento Fis, I-00185 Rome, Italy Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy Ist Nazl Fis Nucl Rome Italy I-00185 Nucl, Sez Roma, I-00185 Rome, Italy
Titolo Testata:
JOURNAL OF HIGH ENERGY PHYSICS
fascicolo: 1, volume: 2001, anno: 2001,
pagine: NIL_278 - NIL_296
SICI:
1029-8479(200101)2001:1<NIL_278:AEOTKM>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONPERTURBATIVE RENORMALIZATION; LATTICE QCD; MATRIX-ELEMENTS; 4-FERMION OPERATORS; PERTURBATION-THEORY; WILSON FERMIONS; LEADING ORDER; WEAK DECAYS; B-PARAMETER; TOP-QUARK;
Keywords:
kaon physics; lattice QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Becirevic, D Univ Rome La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 2, I-00185 Rome, Italy Univ Rome La Sapienza Piazzale Aldo Moro 2 Rome Italy I-00185
Citazione:
D. Becirevic et al., "An estimate of the K-0-K-0 mixing amplitude", J HIGH EN P, 2001(1), 2001, pp. NIL_278-NIL_296

Abstract

We computed the B-K parameter on the lattice by using a non-perturbativelyimproved Wilson action. From our quenched simulation we obtain B-K((MS) over bar) (2 GeV) = 0.73(7)(-0.01)(+0.05). To gain some insight in the systematic errors due to the use of the quenched approximation, we also made the unquenched computation with Wilson fermions. We do not observe any significant deviation with respect to the quenched result.

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Documento generato il 11/07/20 alle ore 03:56:30