Abstract
We conduct a two-flavor () lattice QCD calculation of the elastic phase shifts for pion-pion scattering in the scalar, isoscalar channel (the -meson). The calculation is performed for two quark masses corresponding to pion masses of 315 and 227 MeV. The -meson parameters are extracted using various parametrizations of the scattering amplitude. The results obtained from a chiral unitary parametrization are extrapolated to the physical point and read , where the uncertainties in the parentheses denote the stochastic and systematic ones. The behavior of the -meson parameters with increasing pion mass is discussed as well.
- Received 15 March 2018
DOI:https://doi.org/10.1103/PhysRevD.98.014507
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society