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Kl3 semileptonic form factor from (2+1)-flavor lattice QCD

Kl3 semileptonic form factor from (2+1)-flavor lattice QCD
Kl3 semileptonic form factor from (2+1)-flavor lattice QCD
We present the first results for the Kl3 form factor from simulations with 2+1 flavors of dynamical domain wall quarks. Combining our result, namely, f+(0)=0.964(5) with the latest experimental results for Kl3 decays leads to |Vus|=0.2249(14), reducing the uncertaintity in this important parameter. For the O(p6) term in the chiral expansion we obtain f=-0.013(5).
141601-[4pp]
Boyle, P.
a12661a4-a1da-4fdc-9207-db20087bfaba
Jüttner, A.
83e336df-c2b2-455d-b9d4-9abbd490e930
Kenway, R.D.
1c60cf01-7151-491f-9ab4-18cebc6da3ea
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Sasaki, S.
d56b8ebe-fb17-47fe-b19e-760aec61f9cb
Soni, A.
7a4196ff-0f6b-429e-af54-d1036e9c433b
Tweedie, R.J.
c6bfd9bb-6c20-4ce7-aac1-48f6c3cf2f08
Zanotti, J.M.
3683c637-7418-47b0-bb9d-2b704d28bd2d
Boyle, P.
a12661a4-a1da-4fdc-9207-db20087bfaba
Jüttner, A.
83e336df-c2b2-455d-b9d4-9abbd490e930
Kenway, R.D.
1c60cf01-7151-491f-9ab4-18cebc6da3ea
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Sasaki, S.
d56b8ebe-fb17-47fe-b19e-760aec61f9cb
Soni, A.
7a4196ff-0f6b-429e-af54-d1036e9c433b
Tweedie, R.J.
c6bfd9bb-6c20-4ce7-aac1-48f6c3cf2f08
Zanotti, J.M.
3683c637-7418-47b0-bb9d-2b704d28bd2d

Boyle, P., Jüttner, A., Kenway, R.D., Sachrajda, C.T., Sasaki, S., Soni, A., Tweedie, R.J. and Zanotti, J.M. (2008) Kl3 semileptonic form factor from (2+1)-flavor lattice QCD. Physical Review Letters, 100 (14), 141601-[4pp]. (doi:10.1103/PhysRevLett.100.141601).

Record type: Article

Abstract

We present the first results for the Kl3 form factor from simulations with 2+1 flavors of dynamical domain wall quarks. Combining our result, namely, f+(0)=0.964(5) with the latest experimental results for Kl3 decays leads to |Vus|=0.2249(14), reducing the uncertaintity in this important parameter. For the O(p6) term in the chiral expansion we obtain f=-0.013(5).

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More information

Submitted date: 26 October 2007
e-pub ahead of print date: 9 April 2008
Published date: 11 April 2008
Organisations: High Energy Physics

Identifiers

Local EPrints ID: 143319
URI: https://eprints.soton.ac.uk/id/eprint/143319
PURE UUID: e7053035-14a7-4f28-abb3-7f444e5a030b

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Date deposited: 26 May 2010 08:24
Last modified: 18 Jul 2017 23:10

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