Chiral Suppression of Scalar Glueball Decay
Abstract
Description
Because glueballs are SU(3)_{Flavor} singlets, they are expected to couple equally to u,d, and s quarks, so that equal coupling strengths to π^+π^- and K^+K^- are predicted. However, we show that chiral symmetry implies the scalar glueball amplitude for G_0 \to \qbq is proportional to the quark mass, so that mixing with \sbs mesons is enhanced and decays to K^+K^- are favored over π^+π^-. Together with evidence from lattice calculations and from experiment, this supports the hypothesis that f_0(1710) is the ground state scalar glueball.
9 pages; This revision reconciles posting (approximately) with published version. Posting contains figures that are omitted in the publication
9 pages; This revision reconciles posting (approximately) with published version. Posting contains figures that are omitted in the publication