Phys. Rev. Lett. 87, 072001 (2001) [4 pages]Chiral Extrapolation, Renormalization, and the Viability of the Quark Model |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
Adam P. Szczepaniak1 and Eric S. Swanson2,2b
1Physics Department and Nuclear Theory Center, Indiana University, Bloomington, Indiana 47405-4202
2aDepartment of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
2b and Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606
Received 28 June 2000; published 31 July 2001
The relationship of the quark model to the known chiral properties of QCD is a long-standing problem in the interpretation of low-energy QCD. In particular, how can the pion be viewed as both a collective Goldstone-boson quasiparticle and as a valence-quark-antiquark bound state? A comparison of the many-body solution of a simplified model of QCD to the constituent-quark model demonstrates that the quark model is sufficiently flexible to describe meson hyperfine splitting provided proper renormalization conditions and correct degrees of freedom are employed consistently.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v87/e072001
DOI: 10.1103/PhysRevLett.87.072001
PACS: 12.39.-x, 11.30.Rd, 12.38.-t
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