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@ARTICLE{Drr:828743,
      author       = {Dürr, Stephan and Fodor, Zoltán and Hoelbling, Christian
                      and Krieg, Stefan and Lellouch, Laurent and Lippert, Thomas
                      and Rae, Thomas and Schäfer, Andreas and Scholz, Enno E.
                      and Szabo, Kalman and Varnhorst, Lukas},
      title        = {{L}eptonic decay-constant ratio $f_{K}/f_\pi$ from lattice
                      {QCD} using 2+1 clover-improved fermion flavors with 2-{HEX}
                      smearing},
      journal      = {Physical review / D},
      volume       = {95},
      number       = {5},
      issn         = {2470-0010},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-02609},
      pages        = {054513},
      year         = {2017},
      abstract     = {We present a calculation of the leptonic decay-constant
                      ratio $f_K/f_\pi$ in 2+1 flavor QCD, performed via a series
                      of lattice studies, which allows us to quantify all sources
                      of systematic uncertainty. Our final result is
                      $f_K/f_\pi=1.182(28)$, and with isospin breaking corrections
                      from ChPT the charged decay-constant ratio reads
                      $f_{K^\pm}/f_{\pi^\pm}=1.178(28)$. With $V_\mathrm{ud}$ from
                      super-allowed nuclear beta decays, the CKM matrix element
                      $V_\mathrm{us}=0.2282(54)$ is perfectly compatible with the
                      first-row unitarity constraint of the Standard Model.},
      cin          = {JSC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511)},
      pid          = {G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {1601.05998},
      howpublished = {arXiv:1601.05998},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1601.05998;\%\%$},
      UT           = {WOS:000399145800003},
      doi          = {10.1103/PhysRevD.95.054513},
      url          = {https://juser.fz-juelich.de/record/828743},
}