B-meson mixing from full lattice QCD with physical u, d, s and c quarks

R. J. Dowdall; C. T. H. Davies; R. R. Horgan; G. P. Lepage; C. J. Monahan; J. Shigemitsu

B-meson mixing from full lattice QCD with physical u, d, s and c quarks

High Energy Physics - Lattice 2014-11-26 v1

Authors: R. J. Dowdall , C. T. H. Davies , R. R. Horgan , G. P. Lepage , C. J. Monahan , J. Shigemitsu

Abstract

We present the first lattice QCD calculation of the $B_s$ and $B_d$ mixing parameters with physical light quark masses. We use MILC gluon field configurations that include $u$ , $d$ , $s$ and $c$ sea quarks at 3 values of the lattice spacing and with 3 values of the $u/d$ quark mass going down to the physical value. We use improved NRQCD for the valence $b$ quarks. Preliminary results show significant improvements over earlier values.

Keywords

B-meson mixing lattice QCD physical quark masses NRQCD MILC configurations mixing parameters

Cite

@article{arxiv.1411.6989,
  title  = {B-meson mixing from full lattice QCD with physical u, d, s and c quarks},
  author = {R. J. Dowdall and C. T. H. Davies and R. R. Horgan and G. P. Lepage and C. J. Monahan and J. Shigemitsu},
  journal= {arXiv preprint arXiv:1411.6989},
  year   = {2014}
}

Comments

6 pages, 6 figures, Proceedings of Lattice2014

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