Dynamical determination of B_K from improved staggered quarks

E. Gamiz; S. Collins; C. T. H. Davies; J. Shigemitsu; M. Wingate

Dynamical determination of B_K from improved staggered quarks

High Energy Physics - Lattice 2010-01-18 v1

Authors: E. Gamiz , S. Collins , C. T. H. Davies , J. Shigemitsu , M. Wingate

Abstract

The scaling corrections that affected previous staggered calculations of B_K have been proved to be reduced by using improved actions (HYP, Asqtad) in the quenched approximation. This improved behaviour allows us to perform a reliable dynamical calculation of B_K including quark vacuum polarization effects using the MILC (2+1) flavour dynamical configurations. We report here on the results from such dynamical calculation. We also discuss the renormalization effects with the Asqtad action.

Keywords

B_K parameter staggered quarks improved actions dynamical fermions quark vacuum polarization MILC configurations renormalization

Cite

@article{arxiv.hep-lat/0509188,
  title  = {Dynamical determination of B_K from improved staggered quarks},
  author = {E. Gamiz and S. Collins and C. T. H. Davies and J. Shigemitsu and M. Wingate},
  journal= {arXiv preprint arXiv:hep-lat/0509188},
  year   = {2010}
}

Comments

6 pages, 2 figures. Talk presented at Lattice 2005 (Dublin). To appear in Proceedings of Science

Dynamical determination of B_K from improved staggered quarks

Abstract

Keywords

Cite

Comments

Related papers