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Lattice results for vector meson couplings and parton distribution amplitudes

Antonio, D., Boyle, P.A., Donnellan, M.A., Flynn, J., Juttner, A., Maynard, C., Pendleton, B., Sachrajda, C.T. and Tweedie, R., (2007) Lattice results for vector meson couplings and parton distribution amplitudes Bali, Gunnar, Braun, Vladimir, Gattringer, Christof, Göckeler, Meinulf, Schäfer, Andreas, Weisz, Peter and Wettig, Tilo (eds.) In Proceedings of Lattice 2007, The XXV International Symposium on Lattice Field Theory. International School for Advanced Studies. 7 pp.

Record type: Conference or Workshop Item (Paper)


We present results for the couplings of light vectormesons to vector and tensor currents and on the
low moments of the light-cone distribution amplitudes of the pion and kaon. The calculations are
performed on the RBC and UKQCD collaborations’ ensembles generated with the Iwasaki gauge
action and with 2+1 flavours of domain wall fermions. The (preliminary) results for the ratios of
the couplings of the vector meson to the vector and tensor currents ( fV and f T
V respectively) in the
MS scheme at 2GeV are: f T
r / fr = 0.681(20); f T
K?/ fK? = 0.712(11) and f T
f / ff = 0.751(9). For
the first moment of the kaon’s distribution amplitude we find (in the same scheme and at the same
scale) hx iK = 0.029(2) and for the second moment hx 2 ip = 0.28(3) and hx 2 iK = 0.27(2) .

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Published date: August 2007
Venue - Dates: Lattice 2007, the XXV International Symposium on Lattice Field Theory, 2007-07-30 - 2007-08-04


Local EPrints ID: 57178
PURE UUID: 95d686e6-9a65-4061-847a-3b3b76ae0d9d
ORCID for J. Flynn: ORCID iD

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Date deposited: 20 Aug 2008
Last modified: 17 Jul 2017 14:29

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Author: D. Antonio
Author: P.A. Boyle
Author: M.A. Donnellan
Author: J. Flynn ORCID iD
Author: A. Juttner
Author: C. Maynard
Author: B. Pendleton
Author: C.T. Sachrajda
Author: R. Tweedie
Editor: Gunnar Bali
Editor: Vladimir Braun
Editor: Christof Gattringer
Editor: Meinulf Göckeler
Editor: Andreas Schäfer
Editor: Peter Weisz
Editor: Tilo Wettig

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