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Determining the Kl3 form factors directly at zero momentum transfer

Determining the Kl3 form factors directly at zero momentum transfer
Determining the Kl3 form factors directly at zero momentum transfer
We compute the Kl3 form factors using partially twisted boundary conditions. The twists are chosen so that the Kl3 form factors are calculated directly at zero momentum transfer (q2 = 0),removing the need for a q2 interpolation.

The simulations are performed on an ensemble of the RBC/UKQCD collaboration’s gauge configurations with Domain Wall Fermions and the Iwaski gauge action with an inverse lattice spacing of 1.73(3) GeV. For the value of the Kl3 form factor,f+ (q2), determined directly at q2 = 0, we find a value of f+ (0) = 0.9757(38) at this particular quark mass, which agrees well with our earlier result (0.9774(35)) obtained using the standard, indirect method.
Boyle, P.A.
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Kelly, C.
c4345b06-5900-4597-9dbc-623dc13e6f8e
Maynard, C.
9501fd2d-e787-4902-b0f7-9c2e1bf5c95a
Zanotti, J.M.
3683c637-7418-47b0-bb9d-2b704d28bd2d
Flynn, J.M.
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Pedroso de Lima, H.
c09401db-0f75-479c-bb21-fc25da16414c
Sachrajda, C.T.
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Juttner, A.
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Boyle, P.A.
deafc6c3-3d18-4199-84f5-6f20cd03e311
Kelly, C.
c4345b06-5900-4597-9dbc-623dc13e6f8e
Maynard, C.
9501fd2d-e787-4902-b0f7-9c2e1bf5c95a
Zanotti, J.M.
3683c637-7418-47b0-bb9d-2b704d28bd2d
Flynn, J.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Pedroso de Lima, H.
c09401db-0f75-479c-bb21-fc25da16414c
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Juttner, A.
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247

Boyle, P.A., Kelly, C., Maynard, C., Zanotti, J.M., Flynn, J.M., Pedroso de Lima, H., Sachrajda, C.T. and Juttner, A. (2009) Determining the Kl3 form factors directly at zero momentum transfer. XXVII International Symposium on Lattice Field Theory (LAT2009), China. 26 - 31 Jul 2009. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

We compute the Kl3 form factors using partially twisted boundary conditions. The twists are chosen so that the Kl3 form factors are calculated directly at zero momentum transfer (q2 = 0),removing the need for a q2 interpolation.

The simulations are performed on an ensemble of the RBC/UKQCD collaboration’s gauge configurations with Domain Wall Fermions and the Iwaski gauge action with an inverse lattice spacing of 1.73(3) GeV. For the value of the Kl3 form factor,f+ (q2), determined directly at q2 = 0, we find a value of f+ (0) = 0.9757(38) at this particular quark mass, which agrees well with our earlier result (0.9774(35)) obtained using the standard, indirect method.

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More information

e-pub ahead of print date: July 2009
Published date: July 2009
Venue - Dates: XXVII International Symposium on Lattice Field Theory (LAT2009), China, 2009-07-26 - 2009-07-31

Identifiers

Local EPrints ID: 144055
URI: https://eprints.soton.ac.uk/id/eprint/144055
PURE UUID: 3e5024fb-a1fc-4508-9d9d-bd792afbc757
ORCID for J.M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

Catalogue record

Date deposited: 16 Apr 2010 08:46
Last modified: 16 Nov 2018 01:36

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