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Title: Extraction of isoscalar π π phase shifts from lattice QCD

Journal Article · · Physical Review D

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.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-95ER40907; AC05-06OR23177; PHY-1151648; PHY-1452055
OSTI ID:
1460031
Alternate ID(s):
OSTI ID: 1460363
Report Number(s):
JLAB-THY-18-2662; DOE/OR/23177-4367; arXiv:1803.02897; PRVDAQ; 014507
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 98 Journal Issue: 1; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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