Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishWe present a calculation of f(B) in the static limit, obtained by numerical simulation of quenched QCD, at beta = 6.2 on a 18(3) x 64 lattice, using the SW-Clover quark action. The decay constant has been extracted by studying heavy (static)-light correlation functions of different smeared operators, on a sample of 220 gauge field configurations. We have obtained f(B)static = (290 +/- 15 +/- 45) MeV, where the first error comes from the uncertainty in the determination of the matrix element and the second comes from the uncertainty in the lattice spacing. We also obtain M(Bs) - M(Bd) = (70 +/- 10) MeV and f(Bs)stat/f(Bd)stat = 1.11 (3). A comparison of our results with other calculations of the same quantity is made.
| Titolo: | A high statistics lattice calculation of fB(static) at beta=6.2 using the Clover action |
| Autori: | |
| Data di pubblicazione: | 1994 |
| Rivista: | |
| Citazione: | A high statistics lattice calculation of fB(static) at beta=6.2 using the Clover action / Allton CR; Crisafulli M; Lubicz V; Martinelli G; Salina G; Vladikas A; Bartoloni A; Battista C; Cabasino S; Cabibbo N; Marzano F; Paolucci PS; Pech J; Rapuano F; Sarno R; Todesco GM; Torelli M; Tross W; Vicini P. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 326:3-4(1994), pp. 295-302. |
| Abstract: | We present a calculation of f(B) in the static limit, obtained by numerical simulation of quenched QCD, at beta = 6.2 on a 18(3) x 64 lattice, using the SW-Clover quark action. The decay constant has been extracted by studying heavy (static)-light correlation functions of different smeared operators, on a sample of 220 gauge field configurations. We have obtained f(B)static = (290 +/- 15 +/- 45) MeV, where the first error comes from the uncertainty in the determination of the matrix element and the second comes from the uncertainty in the lattice spacing. We also obtain M(Bs) - M(Bd) = (70 +/- 10) MeV and f(Bs)stat/f(Bd)stat = 1.11 (3). A comparison of our results with other calculations of the same quantity is made. |
| Handle: | http://hdl.handle.net/11590/136971 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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