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Coupling of the light vector meson to the vector and to the tensor current
Author(s) -
Damir Bečirević,
V. Lubicz,
Federico Mescia,
Cecilia Tarantino
Publication year - 2003
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.998
H-Index - 261
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/2003/05/007
Subject(s) - physics , meson , coupling constant , lattice (music) , vector meson , tensor (intrinsic definition) , lattice constant , particle physics , coupling (piping) , current (fluid) , pseudovector , quantum mechanics , geometry , mathematics , materials science , acoustics , diffraction , metallurgy , thermodynamics
We present results for the coupling of the light vector mesons to the tensorcurrent, relative to the standard vector meson decay constants. From anO(a)-improved lattice study, performed at three values of the lattice spacingin the quenched approximation, our final values (in the continuum limit), inthe MS-scheme at 2 GeV, are: (f^T/f)_rho =0.72(2)(+2/-0), (f^T/f)_K* =0.74(2),(f^T/f)_phi =0.76(1).Comment: 15 pages, 4 PostScript figures (typos corrected,results unchanged

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