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Title: Chiral extrapolations of the ρ ( 770 ) meson in N f =2+1 lattice QCD simulations

Journal Article · · Physical Review D
 [1];  [1];  [2];  [1];  [3]
  1. George Washington Univ., Washington, DC (United States)
  2. George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. George Washington Univ., Washington, DC (United States); Univ. of Bern (Switzerland). Albert Einstein Center for Fundamental Physics

Recent $$N_f=2+1$$ lattice data for meson-meson scattering in $$p$$-wave and isospin $I=1$ are analyzed using a unitarized model inspired by Chiral Perturbation Theory in the inverse-amplitude formulation for two and three flavors. We perform chiral extrapolations that postdict phase shifts extracted from experiment quite well. Additionally, the low-energy constants are compared to the ones from a recent analysis of $$N_f=2$$ lattice QCD simulations to check for the consistency of the hadronic model used here. Some inconsistencies are detected in the fits to $$N_f=2+1$$ data, in contrast to the previous analysis of $$N_f=2$$ data.

Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF)
Grant/Contract Number:
AC05-06OR23177; SC0016582; FG02-95ER40907
OSTI ID:
1377015
Alternate ID(s):
OSTI ID: 1376956
Report Number(s):
JLAB-THY--17-2445; DOE/OR/23177--4126; arXiv:1704.06248
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 96; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Three-body Unitarity in the Finite Volume text January 2017
Variational approach to N -body interactions in finite volume journal November 2018