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Chiral Suppression of Scalar Glueball Decay

Michael Chanowitz
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Abstract

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.

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Michael Chanowitz. 2005-10-21. Chiral Suppression of Scalar Glueball Decay. https://doi.org/10.1103/physrevlett.95.172001

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