Publications
Publication Information
| Title | Extraction of isoscalar pi-pi phase-shifts from lattice QCD |
| Authors | Dehua Guo, Andrei Alexandru, Raquel Molina Peralta, Maxim Mai |
| JLAB number | JLAB-THY-18-2662 |
| LANL number | 1803.02897 |
| Other number | DOE/OR/23177-4367 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | NSF PHY-1151648 NSF PHY-1452055 DOE DE-FG02-95ER40907 |
|
Journal Compiled for Physical Review D Volume 98 Issue 01 Page(s) 014507 Refereed | |
| Publication Abstract: | We conduct a two-flavor (N_f = 2) lattice QCD calculation of the elastic phase-shifts for pion-pion scattering in the scalar, isoscalar channel (the sigma-meson). The calculation is performed for two quark masses corresponding to a pion mass of 315 MeV and 227 MeV. The sigma-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 M_sigma = (440 (+10 ?16) (50) ? i 240(20)(25)) MeV, where the uncertainties in the parentheses denote the stochastic and systematic ones. The behavior of the sigma-meson parameters with increasing pion mass is discussed as well. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.98.014507 |
| Accepted Manuscript: | PhysRevD.98.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |