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Lattice results for vector meson couplings and parton distribution amplitudes

Lattice results for vector meson couplings and parton distribution amplitudes
Lattice results for vector meson couplings and parton distribution amplitudes
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) .
369
International School for Advanced Studies
Antonio, D.
f094042c-74c5-4752-9391-832f5d22e09f
Boyle, P.A.
deafc6c3-3d18-4199-84f5-6f20cd03e311
Donnellan, M.A.
6bd5bae7-734a-464e-93ce-370082719477
Flynn, J.
d8e90963-ba56-415c-bbd4-496b7d91d343
Juttner, A.
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Maynard, C.
9501fd2d-e787-4902-b0f7-9c2e1bf5c95a
Pendleton, B.
a997bc1f-9ae9-4b7e-8460-fd1ae54d5f20
Sachrajda, C.T.
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Tweedie, R.
41d43b4d-d21d-4e44-80c3-5f15ab2aef9a
Bali, Gunnar
Braun, Vladimir
Gattringer, Christof
Göckeler, Meinulf
Schäfer, Andreas
Weisz, Peter
Wettig, Tilo
Antonio, D.
f094042c-74c5-4752-9391-832f5d22e09f
Boyle, P.A.
deafc6c3-3d18-4199-84f5-6f20cd03e311
Donnellan, M.A.
6bd5bae7-734a-464e-93ce-370082719477
Flynn, J.
d8e90963-ba56-415c-bbd4-496b7d91d343
Juttner, A.
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Maynard, C.
9501fd2d-e787-4902-b0f7-9c2e1bf5c95a
Pendleton, B.
a997bc1f-9ae9-4b7e-8460-fd1ae54d5f20
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Tweedie, R.
41d43b4d-d21d-4e44-80c3-5f15ab2aef9a
Bali, Gunnar
Braun, Vladimir
Gattringer, Christof
Göckeler, Meinulf
Schäfer, Andreas
Weisz, Peter
Wettig, Tilo

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)

Abstract

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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More information

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

Identifiers

Local EPrints ID: 57178
URI: https://eprints.soton.ac.uk/id/eprint/57178
PURE UUID: 95d686e6-9a65-4061-847a-3b3b76ae0d9d
ORCID for J. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

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Date deposited: 20 Aug 2008
Last modified: 20 Jul 2019 01:21

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Contributors

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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