Ratio F[subscript K]/F[subscript pi] in QCD
Name
Durr-2010-Ratio F-K_F-pi in QC.pdf
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244.42 KB
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Author(s)
Krieg, Stefan F.
Dürr, S.
Fodor, Z.
Hoelbling, C.
Katz, S. D.
Kurth, T.
Lellouch, L.
Lippert, T.
Ramos, A.
Szabó, K. K.
Alternative Title
Ratio FK/Fπ in QCD
Date Issued
March 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
Dürr, S. et al. “Ratio F[subscript K]/F[subscript pi] in QCD.” Physical Review D 81.5 (2010): 054507. © 2010 The American Physical Society.
Version
Final published version
Abstract
We determine the ratio F[subscript K]/F[subscript pi] in QCD with N[subscript f]=2+1 flavors of sea quarks, based on a series of lattice calculations with three different lattice spacings, large volumes, and a simulated pion mass reaching down to about 190 MeV. We obtain F[subscript K]/F[subscript pi]=1.192(7)[subscript stat](6)[subscript syst]. This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |V[subscript us]|. The unitarity relation for the first row of this matrix is found to be well observed.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.054507
