Neutral B meson mixing with static heavy and domain-wall light quarks
Abstract
Neutral B meson mixing matrix elements and B meson decay constants are calculated. Static approximation is used for b quark and domain-wall fermion formalism is employed for light quarks. The calculations are done on 2+1 flavor dynamical ensembles, whose lattice spacings are 0.086 fm and 0.11 fm with a fixed physical spatial volume of about (2.7 fm)^3. In the static quark action, link-smearings are used to improve the signal-to-noise ratio. We employ two kinds of link-smearings and their results are combined in taking a continuum limit. For the matching between the lattice and the continuum theory, one-loop perturbative calculations are used including O(a) improvements to reduce discretization errors. We obtain SU(3) braking ratio \xi=1.222(60) in the static limit of b quark.
Keywords
Cite
@article{arxiv.1312.1010,
title = {Neutral B meson mixing with static heavy and domain-wall light quarks},
author = {Tomomi Ishikawa and Yasumichi Aoki and Taku Izubuchi and Christoph Lehner and Amarjit Soni},
journal= {arXiv preprint arXiv:1312.1010},
year = {2013}
}
Comments
7 pages, 3 figures, talk presented at 31st International Symposium on Lattice Field Theory (LATTICE 2013), July 29 - August 3, 2013, Mainz, Germany