Ratio FK/Fπ in QCD

被引：60

作者：

Duerr, S. ^{[1
,2
]}

Fodor, Z. ^{[1
,2
,3
]}

Hoelbling, C. ^{[1
]}

Katz, S. D. ^{[1
,3
]}

Krieg, S. ^{[4
]}

Kurth, T. ^{[1
]}

Lellouch, L. ^{[5
]}

Lippert, T. ^{[1
,2
]}

Ramos, A. ^{[5
]}

Szabo, K. K. ^{[1
]}

机构：

[1] Berg Univ Wuppertal, D-42119 Wuppertal, Germany

[2] Forschungszentrum Julich, Julich Supercomp Ctr, D-52425 Julich, Germany

[3] Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary

[4] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[5] Univ Aix Marseille 2, CNRS, Ctr Phys Theor, UMR 6207,CNRS Luminy, F-13288 Marseille 9, France

来源：

PHYSICAL REVIEW D | 2010年 / 81卷 / 05期

关键词：

CHIRAL PERTURBATION-THEORY; MASS;

D O I：

10.1103/PhysRevD.81.054507

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：8

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