Exploring the Spectrum of Heavy Quarkonium Hybrids with QCD Sum Rules
Abstract
QCD Laplace sum rules are used to calculate heavy quarkonium (charmonium and bottomonium) hybrid masses in several distinct channels. Previous studies of heavy quarkonium hybrids did not include the effects of dimension-six condensates, leading to unstable sum rules and unreliable mass predictions in some channels. We have updated these sum rules to include dimension-six condensates, providing new mass predictions for the spectra of heavy quarkonium hybrids. We confirm the finding of other approaches that the negative-parity states form the lightest hybrid supermultiplet and the positive-parity states are members of a heavier supermultiplet. Our results disfavor a pure charmonium hybrid interpretation of the , in agreement with previous work.
Keywords
Cite
@article{arxiv.1410.6259,
title = {Exploring the Spectrum of Heavy Quarkonium Hybrids with QCD Sum Rules},
author = {R. T. Kleiv and B. Bulthuis and D. Harnett and T. Richards and Wei Chen and J. Ho and T. G. Steele and Shi-Lin Zhu},
journal= {arXiv preprint arXiv:1410.6259},
year = {2015}
}
Comments
Presented by RTK at the Theory Canada 9 Conference, held at Wilfrid Laurier University in June 2014. Submitted for the conference proceedings to be published in the Canadian Journal of Physics. 5 pages, 1 figure. Version 2: reference added, typo corrected