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This content will become publicly available on September 15, 2017

Title: Two-flavor simulations of ρ(770) and the role of the KK¯ channel

Here, the ρ(770) meson is the most extensively studied resonance in lattice QCD simulations in two (Nf = 2) and three (Nf = 2 + 1) flavor formulations. We analyze Nf = 2 lattice scattering data using unitarized chiral perturbation theory, allowing not only for the extrapolation in mass but also in flavor, Nf = 2 → Nf = 2 + 1. The flavor extrapolation requires information from a global fit to ππ and πK phase shifts from experiment. While the chiral extrapolation of Nf = 2 lattice data leads to masses of the ρ(770) meson far below the experimental one, we find that the missing KK¯ channel is able to explain this discrepancy.
Authors:
 [1] ;  [1] ;  [2] ;  [1]
  1. The George Washington Univ., Washington, D.C. (United States)
  2. The George Washington Univ., Washington, D.C. (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
OSTI Identifier:
1325513
Report Number(s):
JLAB-THY--16-2316; DOE/OR/23177--3907; arXiv:1605.04823
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
PHY1452055; PHY1151648; 1415459; AC05-06OR23177; FG02-95ER40907
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS