The nature of $σ$, $κ$, $a_0(980)$ and $f_0(980)$

Simple item page
dc.creatorvan Beveren, E.
dc.creatorBugg, D. V.
dc.creatorKleefeld, F.
dc.creatorRupp, G.
dc.date2006-06-01
dc.date2006-09-26
dc.date.accessioned2026-07-07T10:24:57Z
dc.date.available2026-07-07T10:24:57Z
dc.descriptionMasses and widths of the four light scalar mesons $σ$, $κ$, $a_0$(980) and $f_0$(980) may be reproduced in a model where mesons scatter via a $q\bar{q}$ loop. A transition potential is used to couple mesons to $q\bar{q}$ at a radius of $\sim 0.57$ fm. Inside this radius, there is an infinite bare spectrum of confined $q\bar{q}$ states, for which a harmonic oscillator is chosen here. The coupled-channel system approximately reproduces the features of both light and heavy meson spectroscopy. The generation of $σ$, $κ$, $a_0(980)$ and $f_0(980)$ is a balance between attraction due to the $q\bar q$ loop and suppression of the amplitudes at the Adler zeros. Phase shifts increase more rapidly as the coupling constant to the mesons increases. This leads to resonant widths which decrease with increasing coupling constant - a characteristically non-perturbative effect.
dc.descriptionPlain LaTeX, 10 pages, 3 EPS figures; v2: 11 pages, better-quality figures, extra references, version accepted for publication in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-ph/0606022
dc.identifierhttp://arxiv.org/abs/hep-ph/0606022
dc.identifierPhys.Lett.B641:265-271,2006
dc.identifierdoi:10.1016/j.physletb.2006.08.051
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176377
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe nature of $σ$, $κ$, $a_0(980)$ and $f_0(980)$
dc.typetext

Files

Collections

arXiv