The Nc dependencies of baryon masses: Analysis with Lattice QCD and Effective Theory

Journal Article · Tue Jul 01 00:00:00 EDT 2014 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.90.014505· OSTI ID:1136853

Calle Cordon, Alvaro C. ^[1]; DeGrand, Thomas A. ^[2]; Goity, Jose L. ^[1]

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1. JLAB
2. University of Colorado

Baryon masses at varying values of Nc and light quark masses are studied with Lattice QCD and the results are analyzed in a low energy effective theory based on a combined framework of the 1/Nc and Heavy Baryon Chiral Perturbation Theory expansions. Lattice QCD results for Nc=3, 5 and 7 obtained in quenched calculations, as well as results for unquenched calculations for Nc=3, are used for the analysis. The results are consistent with a previous analysis of Nc=3 LQCD results, and in addition permit the determination of sub-leading in 1/Nc effects in the spin-flavor singlet component of the baryon masses as well as in the hyperfine splittings.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1136853
• Report Number(s): JLAB-THY-14-1866; DOE/OR/23177-3040; arXiv:1404.2301; FG02-04ER41290; NSF PHY-0855789; NSF PHY-1307413
• Journal Information: Physical Review D, Vol. 90, Issue 01
• Country of Publication: United States
• Language: English