2000 character limit reached
$θ$-dependence of the lightest meson resonances in QCD
Published 30 Jul 2015 in hep-ph, hep-lat, hep-th, and nucl-th | (1507.08570v1)
Abstract: We derive the pion mass and the elastic pion-pion scattering amplitude in the QCD theta-vacuum up to next-to-leading order in chiral perturbation theory. Using the modified inverse amplitude method, we study the theta-dependence of the mass and width of the light scalar meson sigma(500) and the vector meson rho(770).
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