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The kaon semileptonic form factor in N f = 2 + 1 domain wall lattice QCD with physical light quark masses

The kaon semileptonic form factor in N f = 2 + 1 domain wall lattice QCD with physical light quark masses
The kaon semileptonic form factor in N f = 2 + 1 domain wall lattice QCD with physical light quark masses
We present the first calculation of the kaon semileptonic form factor with sea and valence quark masses tuned to their physical values in the continuum limit of 2+1 flavour domain wall lattice QCD. We analyse a comprehensive set of simulations at the phenomenologically convenient point of zero momentum transfer in large physical volumes and for two different values of the lattice spacing. Our prediction for the form factor is f+(0)=0.9685(34)(14) where the first error is statistical and the second error systematic. This result can be combined with experimental measurements of K->pi decays for a determination of the CKM-matrix element for which we predict |Vus|=0.2233(5)(9) where the first error is from experiment and the second error from the lattice computation.
1-22
Boyle, P.A.
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Christ, N.H.
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Flynn, J.M.
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Garron, N.
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Jung, C.
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Juttner, A.
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Mawhinney, R.D.
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Murphy, D.
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Sachrajda, C.T.
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Sanfilippo, F.
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Yin, H.
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Boyle, P.A.
deafc6c3-3d18-4199-84f5-6f20cd03e311
Christ, N.H.
bca5b070-bac5-4160-b12c-826a608a12b4
Flynn, J.M.
d8e90963-ba56-415c-bbd4-496b7d91d343
Garron, N.
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Jung, C.
c6d7a1c1-b894-4c10-b12f-437062bf40bd
Juttner, A.
a90ff7c5-ae8f-4c8e-9679-b5a95b2a6247
Mawhinney, R.D.
5d329cb4-fdf2-442c-a089-567aab306b60
Murphy, D.
15c4d757-a997-4e8a-ad28-b148256e7355
Sachrajda, C.T.
0ed6568b-f52f-4314-8677-4aeeb925d6f7
Sanfilippo, F.
14276d98-365a-4c37-a808-f4e9aff31fdc
Yin, H.
04f9aabf-323a-4a34-a432-66511811790a

Boyle, P.A., Christ, N.H., Flynn, J.M., Garron, N., Jung, C., Juttner, A., Mawhinney, R.D., Murphy, D., Sachrajda, C.T., Sanfilippo, F. and Yin, H. (2015) The kaon semileptonic form factor in N f = 2 + 1 domain wall lattice QCD with physical light quark masses. Journal of High Energy Physics, 2015 (164), 1-22. (doi:10.1007/JHEP06(2015)164).

Record type: Article

Abstract

We present the first calculation of the kaon semileptonic form factor with sea and valence quark masses tuned to their physical values in the continuum limit of 2+1 flavour domain wall lattice QCD. We analyse a comprehensive set of simulations at the phenomenologically convenient point of zero momentum transfer in large physical volumes and for two different values of the lattice spacing. Our prediction for the form factor is f+(0)=0.9685(34)(14) where the first error is statistical and the second error systematic. This result can be combined with experimental measurements of K->pi decays for a determination of the CKM-matrix element for which we predict |Vus|=0.2233(5)(9) where the first error is from experiment and the second error from the lattice computation.

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More information

Accepted/In Press date: 28 May 2015
e-pub ahead of print date: 24 June 2015
Published date: 24 June 2015
Organisations: Theoretical Partical Physics Group

Identifiers

Local EPrints ID: 393644
URI: https://eprints.soton.ac.uk/id/eprint/393644
PURE UUID: 2a09b99e-c8c2-4a63-9724-1017dd2dcce7
ORCID for J.M. Flynn: ORCID iD orcid.org/0000-0002-6280-1677

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Date deposited: 29 Apr 2016 09:10
Last modified: 07 Jul 2018 00:35

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