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Light Meson Distribution Amplitudes | | R. Arthur
; P.A. Boyle
; D. Brömmel
; M.A. Donnellan
; J.M. Flynn
; A. Jüttner
; H. Pedroso de Lima
; T.D. Rae
; C.T. Sachrajda
; B. Samways
; | | Date: |
12 Nov 2010 | | Abstract: | We calculated the first two moments of the light-cone distribution amplitudes
for the pseudoscalar mesons ($pi$ and $K$) and the longitudinally polarised
vector mesons ($
ho$, $K^*$ and $phi$) as part of the UKQCD and RBC
collaborations’ $N_f=2+1$ domain-wall fermion phenomenology programme. These
quantities were obtained with a good precision and, in particular, the expected
effects of $SU(3)$-flavour symmetry breaking were observed. Operators were
renormalised non-perturbatively and extrapolations to the physical point were
made, guided by leading order chiral perturbation theory. The main results
presented are for two volumes, $16^3 imes 32$ and $24^3 imes 64$, with a
common lattice spacing. Preliminary results for a lattice with a finer lattice
spacing, $32^3 imes64$, are discussed and a first look is taken at the use of
twisted boundary conditions to extract distribution amplitudes. | | Source: | arXiv, 1011.2883 | | Services: | Forum | Review | PDF | Favorites | |
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