a_0(980) -> gamma gamma and f_0(980) -> gamma gamma: a consistent description

Abstract

We work out the Linear Sigma Model (LSM) predictions for the 2 gamma decay rates of the a_0(980),f_0(980) mesons under the assumption that they are respectively the I=1 and I=0 members of the bar q q scalar nonet. Agreement with experimental data is achieved provided we include the contribution of a κmeson with mass approx. 900 MeV, and a scalar mixing angle (sigma -f_0 mixing in the {|NS>,|S>} basis) varphi_s approx. -14^\circ, as predicted by the model.

9 pages, 1 figure

References in corpus (3)

• Chiral Symmetry Amplitudes in the S-Wave Isoscalar and Isovector Channels and the σ, f_0(980), a_0(980) Scalar Mesons
• A low-lying scalar meson nonet in a unitarized meson model
• First Observation of PHI(1020)--->PI0+PI0+GAMMA Decay

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