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000017094 0247_ $$2DOI$$a10.1016/j.physletb.2011.10.043
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000017094 041__ $$aeng
000017094 082__ $$a530
000017094 084__ $$2WoS$$aPhysics, Multidisciplinary
000017094 1001_ $$0P:(DE-Juel1)132580$$aDürr, S.$$b0$$uFZJ
000017094 245__ $$aPrecision computation of the kaon bag parameter
000017094 260__ $$aAmsterdam$$bNorth-Holland Publ.$$c2011
000017094 300__ $$a477 - 481
000017094 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000017094 440_0 $$04934$$aPhysics Letters B$$v705$$x0370-2693$$y5
000017094 500__ $$aWe thank Jerome Charles, Robert Harlander and Steve Sharpe for helpful discussions. Computations were performed using HPC resources from FZ Julich and from GENCI-[IDRIS/CCRT] (grant 52275) and clusters at Wuppertal and CPT. This work is supported in part by EU grants I3HP, FP7/2007-2013/ERC No. 208740, MRTN-CT-2006-035482 (FLAVIAnet), DFG grants FO 502/2, SFB-TR 55, by CNRS grants GDR 2921 and PICS 4707.
000017094 520__ $$aIndirect CP violation in K -> pi pi decays plays a central role in constraining the flavor structure of the Standard Model (SM) and in the search for new physics. For many years the leading uncertainty in the SM prediction of this phenomenon was the one associated with the nonperturbative strong interaction dynamics in this process. Here we present a fully controlled lattice QCD calculation of these effects, which are described by the neutral kaon mixing parameter B-K. We use a two step HEX smeared clover-improved Wilson action, with four lattice spacings from a approximate to 0.054 fm to a approximate to 0.093 fm and pion masses at and even below the physical value. Nonperturbative renormalization is performed in the RI-MOM scheme, where we find that operator mixing induced by chiral symmetry breaking is very small. Using fully nonperturbative continuum running, we obtain our main result B-K(RI)(3.5 GeV) = 0.531(6)(stat)(2)(sys). A perturbative 2-loop conversion yields B-K((MS) over bar -NDR)(2 GeV) = 0.564(6)(stat)(3)(sys)(6)(PT) and B (B) over cap (K) = 0.773(8)(stat)(3)(sys)(8)(PT), which is in good agreement with current results from fits to experimental data. (C) 2011 Elsevier B.V. All rights reserved.
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000017094 65320 $$2Author$$aCKM physics
000017094 65320 $$2Author$$aFlavor physics
000017094 65320 $$2Author$$aKaon mixing
000017094 65320 $$2Author$$aB-K
000017094 650_7 $$2WoSType$$aJ
000017094 7001_ $$0P:(DE-HGF)0$$aFodor, Z.$$b1
000017094 7001_ $$0P:(DE-HGF)0$$aHoelbling, C.$$b2
000017094 7001_ $$0P:(DE-HGF)0$$aKatz, S.D.$$b3
000017094 7001_ $$0P:(DE-Juel1)132171$$aKrieg, S.$$b4$$uFZJ
000017094 7001_ $$0P:(DE-HGF)0$$aKurth, T.$$b5
000017094 7001_ $$0P:(DE-HGF)0$$aLellouch, L.$$b6
000017094 7001_ $$0P:(DE-Juel1)132179$$aLippert, Th.$$b7$$uFZJ
000017094 7001_ $$0P:(DE-HGF)0$$aMcNeile, C.$$b8
000017094 7001_ $$0P:(DE-HGF)0$$aPortelli, A.$$b9
000017094 7001_ $$0P:(DE-HGF)0$$aSzabó, K.K.$$b10
000017094 773__ $$0PERI:(DE-600)1466612-1$$a10.1016/j.physletb.2011.10.043$$gVol. 705, p. 477 - 481$$p477 - 481$$q705<477 - 481$$tPhysics letters / B$$v705$$x0370-2693$$y2011
000017094 8567_ $$uhttp://dx.doi.org/10.1016/j.physletb.2011.10.043
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