Hadronic and electromagnetic interactions of quarkonia
Journal
Physical Review
Journal Volume
D57
Pages
2837-2846
Date Issued
1997-10
Author(s)
Abstract
We examine the hadronic interactions of quarkonia, focusing on the decays (Formula presented) and (Formula presented). The leading gluonic operators in the multipole expansion are matched onto the chiral Lagrangian with the coefficients fit to available data, both at tree level and loop level in the chiral expansion. A comparison is made with naive expectations loosely based on the large-(Formula presented) limit of QCD in an effort to determine the reliability of this limit for other observables, such as the binding of (Formula presented) to nuclei. Crossing symmetry is used to estimate the cross section for inelastic (Formula presented) scattering, potentially relevant for heavy ion collisions. The radiative decays (Formula presented) and (Formula presented) are determined at tree level in the chiral Lagrangian. Measurement of such decays will provide a test of the multipole and chiral expansions. We briefly discuss decays from the (Formula presented) and also the contribution from (Formula presented)’s to the electromagnetic polarizability of quarkonia. © 1998 The American Physical Society.
Type
journal article