Kaon semileptonic decays near the physical point
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(Published version)
Date
2012
Authors
Sivalingam, K.
Boyle, P.
Flynn, J.
Juttner, A.
Sachrajda, C.
Zanotti, J.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
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Conference paper
Citation
PoS (Lattice 2012); 112
Statement of Responsibility
K. Sivalingam, P.A. Boyle, J.M. Flynn, A. Jüttner, C.T. Sachrajda, J.M. Zanotti, RBC and UKQCD Collaborations
Conference Name
International Symposium on Lattice Field Theory (30th : 2012 : Cairns, Australia)
Abstract
The CKM matrix element jVusj can be extracted from the experimental measurement of semileptonic K -φ decays. The determination depends on theory input for the corresponding vector form factor in QCD. We present a preliminary update on our efforts to compute it in Nf = 2+1 lattice QCD using domain wall fermions for several lattice spacings and with a lightest pion mass of about 170MeV. By using partially twisted boundary conditions we avoid systematic errors associated with an interpolation of the form factor in momentum-transfer, while simulated pion masses near the physical point reduce the systematic error due to the chiral extrapolation.
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Dissertation Note
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Extent: 7p.
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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence