Continuum limit of proton decay matrix elements in quenched lattice QCD
High Energy Physics - Lattice
2015-06-25 v1
Abstract
We present a lattice QCD calculation of the parameters \alpha and \beta which are necessary in the theoretical estimation of the proton lifetime in grand unified theories (GUTs) using chiral lagrangian approach. The simulation is carried out using the Wilson quark action at three gauge coupling constants in the quenched approximation. We obtain |\alpha(2GeV)|=0.0091(08)(^{+10}_{-19})GeV^3 and |\beta(2GeV)|=0.0098(08)(^{+10}_{-20})GeV^3 in the continuum limit where the first error is statistical and the second one is due to scale setting.
Cite
@article{arxiv.hep-lat/0309139,
title = {Continuum limit of proton decay matrix elements in quenched lattice QCD},
author = {CP-PACS and JLQCD Collaborations and : and N. Tsutsui and S. Aoki and M. Fukugita and S. Hashimoto and K-I. Ishikawa and T. Ishikawa and N. Ishizuka and Y. Iwasaki and K. Kanaya and T. Kaneko and Y. Kuramashi and M. Okawa and T. Onogi and N. Taniguchi and A. Ukawa and T. Yoshié},
journal= {arXiv preprint arXiv:hep-lat/0309139},
year = {2015}
}
Comments
3 pages, 2 figures, talk presented at Lattice2003(matrix)