Scaling behavior of $f_{B}$ with NRQCD

JLQCD Collaboration; K-I. Ishikawa; N. Yamada; S. Aoki; M. Fukugita; S. Hashimoto; N. Ishizuka; Y. Iwasaki; K. Kanaya; T. Kaneda; S. Kaya; Y. Kuramashi; H. Matsufuru; M. Okawa; T. Onogi; S. Tominaga; N. Tsutsui; A. Ukawa; T. Yoshié

doi:10.1016/S0920-5632(99)85074-9

Scaling behavior of $f_{B}$ with NRQCD

High Energy Physics - Lattice 2009-10-31 v1

Authors: JLQCD Collaboration , K-I. Ishikawa , N. Yamada , S. Aoki , M. Fukugita , S. Hashimoto , N. Ishizuka , Y. Iwasaki , K. Kanaya , T. Kaneda , S. Kaya , Y. Kuramashi , H. Matsufuru , M. Okawa , T. Onogi , S. Tominaga , N. Tsutsui , A. Ukawa , T. Yoshié

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Abstract

We investigate the scaling behavior of the $B$ meson decay constant $f_B$ and $f_{B_{s}}$ at $\beta$ $=$ $5.7, 5.9, 6.1$ , employing the NRQCD heavy quark action and the clover light quark action. Mixing effect from dimension-4 operator in the heavy-light axial-vector current is studied, and we find that the $a$ dependence of $f_B$ is significantly reduced. Our preliminary result for the decay constants in the quenched approximation is $f_{B}$ $=$ $162(^{+35}_{-18})$ MeV, $f_{B_{s}}$ $=$ $190(^{+40}_{-19})$ MeV, and $f_{B_{s}}/f_{B}$ $=$ $1.18(^{+6}_{-6})$ .

Keywords

B meson decay constant NRQCD scaling behavior quenched approximation lattice QCD

Cite

@article{arxiv.hep-lat/9809152,
  title  = {Scaling behavior of $f_{B}$ with NRQCD},
  author = {JLQCD Collaboration and K-I. Ishikawa and N. Yamada and S. Aoki and M. Fukugita and S. Hashimoto and N. Ishizuka and Y. Iwasaki and K. Kanaya and T. Kaneda and S. Kaya and Y. Kuramashi and H. Matsufuru and M. Okawa and T. Onogi and S. Tominaga and N. Tsutsui and A. Ukawa and T. Yoshié},
  journal= {arXiv preprint arXiv:hep-lat/9809152},
  year   = {2009}
}

Comments

LATTICE98(matrixelement), 3 pages, 3 eps figures

Scaling behavior of $f_{B}$ with NRQCD

Abstract

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