Chiral Suppression of Scalar Glueball Decay

Details Chiral Suppression of Scalar Glueball Decay Chiral Suppression of Scalar Glueball Decay

2005-06-13

arxiv.org/abs/hep-ph/0506125v2

Phys.Rev.Lett.95:172001,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages; This revision reconciles posting (approximately) with published version. Posting contains figures that are omitted in

Scientific paper

10.1103/PhysRevLett.95.172001

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 \pi^+\pi^- 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 \pi^+\pi^-. Together with evidence from lattice calculations and from experiment, this supports the hypothesis that f_0(1710) is the ground state scalar glueball.

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