A high statistics lattice calculation of fB in the static limit on APE
Creators
- Allton, C.R.1, 2
- Lubicz, V.1, 2
- Martinelli, G.3, 1, 2
- Salina, G.4, 5
- Vladikas, A.4, 5, 1, 2
- Bartoloni, A.1, 2
- Battista, C.1, 2
- Cabasino, S.1, 2
- Cabibbo, N.4, 5
- Marzano, F.1, 2
- Paolucci, P.S.1, 2
- Pech, J.1, 2
- Rapuano, F.1, 2
- Sarno, R.1, 2
- Todesco, G.M.1, 2
- Torelli, M.1, 2
- Tross, W.1, 2
- Tripiccione, R.6
- Vicini, P.1, 2
- APE Collaboration
- 1. INFN, Sezione di Roma (Italy)
- 2. Dipt. di Fisica, Univ. di Roma ''La Sapienza'', Rome (Italy)
- 3. Ecole Normale Superieure, 75 - Paris (France). Lab. de Physique Theorique
- 4. INFN, Sezione di Roma 2 (Italy)
- 5. Dipt. di Fisica, Univ. di Roma ''Tor Vergata'', Rome (Italy)
- 6. INFN, Sezione di Pisa (Italy)
Description
We present a high statistics calculation of fB in the static limit. The results have been obtained by numerical simulation of quenched QCD, at β 6.0 on a 183 x 32 lattice. We compare fB calculated by using the Wilson and the Clover quark actions. The decay constant is obtained by studying heavy-light correlation functions of different smeared operators, on a sample of 210 gauge field configurations. We find that cubic smearings of size Ls≤3 ot Ls≥9 are bad projectors on the lightest pseudoscalar state. Combining the information coming from smearing Ls = 5 and Ls = 7, we have obtained fB = 370±40 MeV in the Clover case and fB = 350±40±30 MeV in the Wilson case. Our results support a large value of the pseudoscalar decay constant in the static approximation. (orig.)
Additional details
Publishing Information
- Journal Title
- Nuclear Physics. B
- Journal Volume
- 413
- Journal Issue
- 1-2
- Journal Page Range
- p. 461-480.
- ISSN
- 0550-3213
- CODEN
- NUPBBO
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 25045716
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ASYMPTOTIC SOLUTIONS; B MESONS; COMPUTERIZED SIMULATION; CORRELATION FUNCTIONS; COUPLING CONSTANTS; FLAVOR MODEL; LATTICE FIELD THEORY; LEPTONIC DECAY; MASS DIFFERENCE; QUANTUM CHROMODYNAMICS; QUARK MODEL; QUARKS; REST MASS; STEADY-STATE CONDITIONS; STRANGE PARTICLES; SU-3 GROUPS; THEORETICAL DATA; VECTOR FIELDS
- Descriptors DEC
- BASIC INTERACTIONS; BEAUTY PARTICLES; BOSONS; COMPOSITE MODELS; CONSTRUCTIVE FIELD THEORY; DATA; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; FUNCTIONS; HADRONS; INFORMATION; INTERACTIONS; LIE GROUPS; MASS; MATHEMATICAL MODELS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SIMULATION; SU GROUPS; SYMMETRY GROUPS; WEAK INTERACTIONS; WEAK PARTICLE DECAY
Optional Information
- Collaborations
- APE Collaboration.