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Titolo:
Towards a lattice determination of the B*B pi coupling
Autore:
de Divitiis, GM; Del Debbio, L; Di Pierro, M; Flynn, JM; Michael, C; Peisa, J;
Indirizzi:
Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, EnglandUniv Southampton Southampton Hants England SO17 1BJ 7 1BJ, Hants, England Unive,iverpool, Dept Appl Math & Theoret Phys, Liverpool L69 3BX, Merseysid Univ Liverpool Liverpool Merseyside England L69 3BX ol L69 3BX, Merseysid
Titolo Testata:
JOURNAL OF HIGH ENERGY PHYSICS
fascicolo: 10, , anno: 1998,
pagine: NIL_143 - NIL_166
SICI:
1029-8479(199812):10<NIL_143:TALDOT>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-QUARK SYMMETRY; EFFECTIVE FIELD-THEORY; FORM-FACTORS; MATRIX-ELEMENTS; CHIRAL DYNAMICS; WILSON FERMIONS; AXIAL CURRENT; STATIC QUARK; QCD; DECAYS;
Keywords:
lattice gauge field theories; B-physics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: de Divitiis, GM Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England Univ Southampton Southampton Hants England SO17 1BJ gland
Citazione:
G.M. de Divitiis et al., "Towards a lattice determination of the B*B pi coupling", J HIGH EN P, (10), 1998, pp. NIL_143-NIL_166

Abstract

The coupling g(B* B pi) is related to the form factor at zero momentum of the axial current between B*- and B-states. This form factor is evaluated on the lattice using static heavy quarks and light quark propagators determined by a stochastic inversion of the fermionic bilinear. The g(B* B pi) coupling is related to the coupling g between heavy mesons and low-momentum pions in the effective heavy meson chiral lagrangian. The coupling of the effective theory can therefore be computed by numerical simulations. We find the value g = 0.42(4)(8). Besides its theoretical interest, the phenomenological implications of such a determination are discussed.

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Documento generato il 01/04/20 alle ore 20:54:39