Ratio FK/Fπ in QCD

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

doi:10.1103/PhysRevD.81.054507

Ratio FK/Fπ in QCD

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

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

Abstract

We determine the ratio FK/Fπ in QCD with Nf=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 FK/Fπ=1.192(7)stat(6)syst. This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |Vus|. The unitarity relation for the first row of this matrix is found to be well observed.

Original language	English (US)
Article number	054507
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	81
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.81.054507
State	Published - Mar 22 2010

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1103/PhysRevD.81.054507

Cite this

@article{4a822f37905840238ae126489353fcee,

title = "Ratio FK/Fπ in QCD",

abstract = "We determine the ratio FK/Fπ in QCD with Nf=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 FK/Fπ=1.192(7)stat(6)syst. This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |Vus|. The unitarity relation for the first row of this matrix is found to be well observed.",

author = "S. D{\"u}rr and Z. Fodor and C. Hoelbling and Katz, \{S. D.\} and S. Krieg and T. Kurth and L. Lellouch and T. Lippert and A. Ramos and Szab{\'o}, \{K. K.\}",

year = "2010",

month = mar,

day = "22",

doi = "10.1103/PhysRevD.81.054507",

language = "English (US)",

volume = "81",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "5",

}

TY - JOUR

T1 - Ratio FK/Fπ in QCD

AU - Dürr, S.

AU - Fodor, Z.

AU - Hoelbling, C.

AU - Katz, S. D.

AU - Krieg, S.

AU - Kurth, T.

AU - Lellouch, L.

AU - Lippert, T.

AU - Ramos, A.

AU - Szabó, K. K.

PY - 2010/3/22

Y1 - 2010/3/22

N2 - We determine the ratio FK/Fπ in QCD with Nf=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 FK/Fπ=1.192(7)stat(6)syst. This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |Vus|. The unitarity relation for the first row of this matrix is found to be well observed.

AB - We determine the ratio FK/Fπ in QCD with Nf=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 FK/Fπ=1.192(7)stat(6)syst. This result is then used to give an updated value of the Cabibbo-Kobayashi-Maskawa) matrix element |Vus|. The unitarity relation for the first row of this matrix is found to be well observed.

UR - https://www.scopus.com/pages/publications/77950556904

UR - https://www.scopus.com/pages/publications/77950556904#tab=citedBy

U2 - 10.1103/PhysRevD.81.054507

DO - 10.1103/PhysRevD.81.054507

M3 - Article

AN - SCOPUS:77950556904

SN - 1550-7998

VL - 81

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 5

M1 - 054507

ER -

Ratio FK/Fπ in QCD

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this