Journal Article

PreJuSER-9794

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ratio FK/F Pi in QCD

Dürr, S. ; Fodor, Z. ; Hoelbling, C. ; Katz, S. D. ; Krieg, S. ; Kurth, T. ; Lellouch, L. ; Lippert, T.FZJ* ; Ramos, A. ; Szabó, K.

2010
Soc. [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/11144  doi:10.1103/PhysRevD.81.054507

Abstract: We determine the ratio F-K/ F-pi in QCD with N-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-K / F-pi = 1.192(7)(stat)(6)(syst). This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element vertical bar V-us vertical bar. The unitarity relation for the first row of this matrix is found to be well observed.

Keyword(s): J

Note: Computations were performed on Blue Gene supercomputers at F. Z. Julich and IDRIS (GENCI), as well as on clusters at Wuppertal and CPT. This work is supported in part by the U.S. Department of Energy under Grant No. DE-FG02-05ER25681, EU grant I3HP, OTKA grant AT049652, DFG grant FO 502/ 1-2, SFB/ TR-55, EU RTN contract MRTN-CT-2006-035482 (FLAVIAnet) and by the CNRS's GDR Grant No. 2921 and PICS Grant No. 4707.

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Contributing Institute(s):

1. Jülich Supercomputing Centre (JSC)
2. Jülich Aachen Research Alliance - High-Performance Computing (JARA-HPC)

Research Program(s):

1. Scientific Computing (FUEK411) (FUEK411)
2. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)

Appears in the scientific report 2010

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