Quarkonium Spectroscopy: Beyond One-Gluon Exchange
Abstract
In this work an improved potential model for quarkonium spectra (charmonium, bottomonium) is constructed. Beside the one-gluon exchange and a linear confinement potential, the model includes systematically effects from two-gluon exchange and the induced interaction (i.e. t-channel exchanges of quark-antiquark bound states). These turn out to be important in order to reproduce correctly the fine- and hyperfine structure of the charmonium and bottomonium states. It is demonstrated that such a satisfactory description of the quarkonium spectra can be obtained with parameters (quark masses, strong coupling constant and string tension) consistent with values of lattice simulations and QCD determinations.
Cite
@article{arxiv.0707.1269,
title = {Quarkonium Spectroscopy: Beyond One-Gluon Exchange},
author = {Johannes Eiglsperger},
journal= {arXiv preprint arXiv:0707.1269},
year = {2007}
}
Comments
94 pages, 38 figures, diploma thesis, TU Muenchen, Germany, Jan. 2007