Extraction of isoscalar phase shifts from lattice QCD
Abstract
Here, we conduct a two-flavor (Nf = 2) lattice QCD calculation of the elastic phase shifts for pion-pion scattering in the scalar, isoscalar channel (the σ-meson). The calculation is performed for two quark masses corresponding to pion masses of 315 and 227 MeV. The σ-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 Mσ = (440+10–16(50) – i240(20)(25)) MeV, where the uncertainties in the parentheses denote the stochastic and systematic ones. The behavior of the σ-meson parameters with increasing pion mass is discussed as well.
- Authors:
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1460031
- Alternate Identifier(s):
- OSTI ID: 1460363
- Report Number(s):
- JLAB-THY-18-2662; DOE/OR/23177-4367; arXiv:1803.02897
Journal ID: ISSN 2470-0010; PRVDAQ; 014507
- Grant/Contract Number:
- FG02-95ER40907; AC05-06OR23177; PHY-1151648; PHY-1452055
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Guo, D., Alexandru, A., Molina, R., Mai, M., and Döring, M. Extraction of isoscalar π π phase shifts from lattice QCD. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.014507.
Guo, D., Alexandru, A., Molina, R., Mai, M., & Döring, M. Extraction of isoscalar π π phase shifts from lattice QCD. United States. https://doi.org/10.1103/PhysRevD.98.014507
Guo, D., Alexandru, A., Molina, R., Mai, M., and Döring, M. Thu .
"Extraction of isoscalar π π phase shifts from lattice QCD". United States. https://doi.org/10.1103/PhysRevD.98.014507.
@article{osti_1460031,
title = {Extraction of isoscalar π π phase shifts from lattice QCD},
author = {Guo, D. and Alexandru, A. and Molina, R. and Mai, M. and Döring, M.},
abstractNote = {Here, we conduct a two-flavor (Nf = 2) lattice QCD calculation of the elastic phase shifts for pion-pion scattering in the scalar, isoscalar channel (the σ-meson). The calculation is performed for two quark masses corresponding to pion masses of 315 and 227 MeV. The σ-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 Mσ = (440+10–16(50) – i240(20)(25)) MeV, where the uncertainties in the parentheses denote the stochastic and systematic ones. The behavior of the σ-meson parameters with increasing pion mass is discussed as well.},
doi = {10.1103/PhysRevD.98.014507},
journal = {Physical Review D},
number = 1,
volume = 98,
place = {United States},
year = {Thu Jul 12 00:00:00 EDT 2018},
month = {Thu Jul 12 00:00:00 EDT 2018}
}
https://doi.org/10.1103/PhysRevD.98.014507
Web of Science
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