Two-photon couplings of quarkonia with arbitrary angular momenta.

摘要

The observation of a large (gamma)(gamma) width for the (sup 1)D(sub 2) q(bar q) state (pi)(sub 2)(1670) suggests that the (gamma)(gamma) couplings of many orbitally-excited light q(bar q) states may be experimentally accessible. In this talk we present ( ...