$\theta$-dependence of the lightest meson resonances in QCD
High Energy Physics - Phenomenology
2015-09-30 v1 High Energy Physics - Lattice
High Energy Physics - Theory
Nuclear Theory
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).
Keywords
Cite
@article{arxiv.1507.08570,
title = {$\theta$-dependence of the lightest meson resonances in QCD},
author = {Neramballi Ripunjay Acharya and Feng-Kun Guo and Maxim Mai and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:1507.08570},
year = {2015}
}
Comments
11 pages, 3 figures