Please use this identifier to cite or link to this item:
Title: The Deuteron and Exotic Two-Body Bound States from Lattice QCD
Author: Beane, Silas R.
Chang, Emmanuel
Detmold, William
Lin, H. W.
Luu, Thomas C.
Orginos, Kostas
Parreño García, Assumpta
Savage, Martin J.
Torok, Aaron
Walker-Loud, André
NPLQCD Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 1-Mar-2012
Publisher: American Physical Society
Abstract: Results of a high-statistics, multivolume lattice QCD exploration of the deuteron, the dineutron, the H-dibaryon, and the Ξ − Ξ − system at a pion mass of m π ∼ 390     MeV are presented. Calculations were performed with an anisotropic n f = 2 + 1 clover discretization in four lattice volumes of spatial extent L ∼ 2.0 , 2.5, 2.9, and 3.9 fm, with a lattice spacing of b s ∼ 0.123     fm in the spatial direction and b t ∼ b s / 3.5 in the time direction. Using the results obtained in the largest two volumes, the Ξ − Ξ − is found to be bound by B Ξ − Ξ − 0 = 14.0 ( 1.4 ) ( 6.7 )     MeV , consistent with expectations based upon phenomenological models and low-energy effective field theories constrained by nucleon-nucleon and hyperon-nucleon scattering data at the physical light-quark masses. Further, we find that the deuteron and the dineutron have binding energies of B d = 11 ( 05 ) ( 12 )     MeV and B n n = 7.1 ( 5.2 ) ( 7.3 )     MeV , respectively. With an increased number of measurements and a refined analysis, the binding energy of the H-dibaryon is B H = 13.2 ( 1.8 ) ( 4.0 )     MeV at this pion mass, updating our previous result.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2012, vol. 85, num. 5, p. 054511
Related resource:
ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

Files in This Item:
File Description SizeFormat 
606131.pdf1.55 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.