Hybrid Quarkonia with Dynamical Sea Quarks
High Energy Physics - Lattice
2012-08-27 v2 High Energy Physics - Phenomenology
Abstract
We present a dynamical lattice calculation with 2 flavours for bottomonium states with an additional gluonic excitation. Using improved actions for the quarks and gauge fields at a lattice spacing of fm, we find 10.977(61)(62) GeV for the energy of the lowest lying -hybrid, where the first error is statistical and the second denotes the systematic uncertainty due to the determination of scale. In a parallel quenched simulation we demonstrate explicitly that vacuum polarisation effects are less than 10% of the splitting with the ground state.
Keywords
Cite
@article{arxiv.hep-lat/0103015,
title = {Hybrid Quarkonia with Dynamical Sea Quarks},
author = {PACS Collaboration and T. Manke and A. Ali Khan and S. Aoki and R. Burkhalter and S. Ejiri and M. Fukugita and S. Hashimoto and N. Ishizuka and Y. Iwasaki and K. Kanaya and T. Kaneko and Y. Kuramashi and K. Nagai and M. Okawa and H. P. Shanahan and A. Ukawa and T. Yoshie},
journal= {arXiv preprint arXiv:hep-lat/0103015},
year = {2012}
}
Comments
4 pages, 2 figures, minor corrections and added references