String breaking with dynamical Wilson fermions
摘要
We present results of our ongoing determination of string breaking in full QCD with N_f=2 Wilson fermions. Our investigation of the fission of the static quark-antiquark string into a static-light meson-antimeson system is based on dynamical configurations of size 24^3 x 40 produced by the TxL collaboration. Combining various optimization methods we determine the matrix elements of the two-by-two system with so far unprecedented accuracy. The all-to-all light quark propagators occurring in the transition element are computed from eigenmodes of the Hermitian Wilson-Dirac matrix complemented by stochastic estimates in the orthogonal subspace. We observe a clear signature for level-splitting between ground state and excited potential. Thus, for the first time, string breaking induced by sea quarks is observed in a simulation of 4-dimensional lattice-QCD.
引用
@article{arxiv.hep-lat/0409137,
title = {String breaking with dynamical Wilson fermions},
author = {G. S. Bali and Th. Duessel and Th. Lippert and H. Neff and Z. Prkacin and K. Schilling},
journal= {arXiv preprint arXiv:hep-lat/0409137},
year = {2009}
}
备注
3 pages, 3 figures, contribution to Lattice 2004