Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-04-18
Phys.Rev.D54:6811-6829,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
44 pages, 22 eps figures, RevTex, complete postscript file available at http://csep2.phy.ornl.gov/theory_group/people/barnes/p
Scientific paper
10.1103/PhysRevD.54.6811
Open-flavor strong decays are mediated by $q\bar q$ pair production, which is known to occur dominantly with \3p0 quantum numbers. The relation of the phenomenological \3p0 model of these decays to ``microscopic" QCD decay mechanisms has never been clearly established. In this paper we investigate $q\bar q$ meson decay amplitudes assuming pair production from the scalar confining interaction (sKs) and from one gluon exchange (OGE). sKs pair production predicts decay amplitudes of approximately the correct magnitude and D/S amplitude ratios in $b_1\to\omega\pi$ and $a_1\to\rho\pi$ which are close to experiment. The OGE decay amplitude is found to be subdominant in most cases, a notable exception being $^3$P$_0\to{}^1$S$_0+{}^1$S$_0$. The full sKs~+~OGE amplitudes differ significantly from \3p0 model predictions in some channels and can be distinguished experimentally, for example through an accurate comparison of the D/S amplitude ratios in $b_1\to\omega\pi$ and $a_1\to\rho\pi$.
Ackleh E. S.
Barnes Ted
Swanson Eric S.
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