Improving flavor symmetry in the Kogut-Susskind hadron spectrum

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.R1133· OSTI ID:450572

Blum, T ^[1]; DeTar, C ^[2]; Gottlieb, S; Rummukainen, K ^[3]; Heller, U M ^[4]; Hetrick, J E; Toussaint, D ^[5]; Sugar, R L ^[6]; Wingate, M ^[7]

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1. Department of Physics, Brookhaven National Lab, Upton, New York 11973 (United States)
2. Physics Department, University of Utah, Salt Lake City, Utah 84112 (United States)
3. Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
4. SCRI, Florida State University, Tallahassee, Florida 32306-4052 (United States)
5. Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
6. Department of Physics, University of California, Santa Barbara, California 93106 (United States)
7. Physics Department, University of Colorado, Boulder, Colorado 80309 (United States)

We study the effect of modifying the coupling of Kogut-Susskind quarks to the gauge field by replacing the link matrix in the quark action by a {open_quotes}fat link,{close_quotes} or sum of link plus three-link paths. Flavor symmetry breaking, determined by the mass difference between the Goldstone and non-Goldstone local pions, is reduced by approximately a factor of 2 by this modification. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: AC02-86ER40253; FG02-91ER40628; FG02-91ER40661; FG03-95ER40906; FG05-85ER25000; FG05-92ER40742
• OSTI ID: 450572
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYON NUMBER
COUPLING
FLAVOR
GOLDSTONE BOSONS
HADRONS
MASS DIFFERENCE
MASS SPECTRA
QUANTUM CHROMODYNAMICS
QUARKS
RENORMALIZATION
SYMMETRY BREAKING