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Pattern of Light Scalar Mesons

Abstract

Combining the recent lattice calculation of a0(1450)a_0(1450) and Οƒ(600)\sigma(600) mesons with the overlap fermion in the chiral regime with the pion mass less than 300MeV300 {\rm MeV}, the quenched lattice calculation of the scalar glueball, and the phenomenological study of the mixing of isoscalar scalar mesons f0(1710)f_0(1710), f0(1500)f_0(1500), f0(1370)f_0(1370) through their decays, a simple pattern for the light scalar mesons begins to emerge. Below 1 GeV, the scalar mesons form a nonet of tetraquark mesoniums. Above 1 GeV, the nonent qqΛ‰q\bar{q} mesons are made of an octet with largely unbroken SU(3) symmetry and a fairly good singlet which is f0(1370)f_0(1370). f0(1710)f_0(1710) is identified as an almost pure scalar glueball with a ∼10\sim 10% mixture of qqΛ‰q\bar{q}.Comment: 8 pages, 4 figure

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    Last time updated on 01/04/2019