The covalent bond in Particle Spectroscopy
High Energy Physics - Experiment
2014-11-20 v1
Abstract
It is proposed that meson resonances are linear combinations of q-qbar and meson-meson (MM); baryon resonances are combinations of qqq and meson-baryon (MB). Mixing between these combinations arises via decays of confined states to meson-meson or meson-baryon. There is a precise analogy with the covalent bond in molecular physics; it helps to visualise what is happening physically. One eigenstate is lowered by the mixing; the other moves up and normally increases in width. Cusps arise at thresholds. At sharp thresholds due to S-wave 2-particle decays, these cusps play a conspicuous role in many sets of data.
Keywords
Cite
@article{arxiv.1001.1712,
title = {The covalent bond in Particle Spectroscopy},
author = {D. V. Bugg},
journal= {arXiv preprint arXiv:1001.1712},
year = {2014}
}
Comments
11 pages, 2 figures; extended version of a talk at the Hadron09 conference