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Title: QCD spectrum with three quark flavors

Abstract

We present results from a lattice hadron spectrum calculation using three flavors of dynamical quarks -- two light and one strange -- and quenched simulations for comparison. These simulations were done using a one-loop Symanzik improved gauge action and an improved Kogut-Susskind quark action. The lattice spacings, and hence also the physical volumes, were tuned to be the same in all the runs to better expose differences due to flavor number. Lattice spacings were tuned using the static quark potential, so as a by-product we obtain updated results for the effect of sea quarks on the static quark potential. We find indications that the full QCD meson spectrum is in better agreement with experiment than the quenched spectrum. For the 0{sup ++} (a{sub 0}) meson we see a coupling to two pseudoscalar mesons, or a meson decay on the lattice.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40277266
DOE Contract Number:  
NDE-FG02-91ER-40661; NDE-FG02-97ER-41022; NDE-FG03-95ER-40894; NDE-FG03-95ER-40906; NE-FG02-91ER-40628
Resource Type:
Journal Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 64; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.64.054506; Othernumber: PRVDAQ000064000005054506000001; 060117PRD; PBD: 1 Sep 2001; Journal ID: ISSN 0556-2821
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BY-PRODUCTS; DECAY; HADRONS; MESONS; PSEUDOSCALAR MESONS; QUANTUM CHROMODYNAMICS; QUARKS

Citation Formats

Bernard, Claude, Burch, Tom, Orginos, Kostas, Toussaint, Doug, DeGrand, Thomas A., DeTar, Carleton, Datta, Saumen, Gottlieb, Steven, Heller, Urs M., and Sugar, Robert. QCD spectrum with three quark flavors. United States: N. p., 2001. Web. doi:10.1103/PhysRevD.64.054506.
Bernard, Claude, Burch, Tom, Orginos, Kostas, Toussaint, Doug, DeGrand, Thomas A., DeTar, Carleton, Datta, Saumen, Gottlieb, Steven, Heller, Urs M., & Sugar, Robert. QCD spectrum with three quark flavors. United States. doi:10.1103/PhysRevD.64.054506.
Bernard, Claude, Burch, Tom, Orginos, Kostas, Toussaint, Doug, DeGrand, Thomas A., DeTar, Carleton, Datta, Saumen, Gottlieb, Steven, Heller, Urs M., and Sugar, Robert. Sat . "QCD spectrum with three quark flavors". United States. doi:10.1103/PhysRevD.64.054506.
@article{osti_40277266,
title = {QCD spectrum with three quark flavors},
author = {Bernard, Claude and Burch, Tom and Orginos, Kostas and Toussaint, Doug and DeGrand, Thomas A. and DeTar, Carleton and Datta, Saumen and Gottlieb, Steven and Heller, Urs M. and Sugar, Robert},
abstractNote = {We present results from a lattice hadron spectrum calculation using three flavors of dynamical quarks -- two light and one strange -- and quenched simulations for comparison. These simulations were done using a one-loop Symanzik improved gauge action and an improved Kogut-Susskind quark action. The lattice spacings, and hence also the physical volumes, were tuned to be the same in all the runs to better expose differences due to flavor number. Lattice spacings were tuned using the static quark potential, so as a by-product we obtain updated results for the effect of sea quarks on the static quark potential. We find indications that the full QCD meson spectrum is in better agreement with experiment than the quenched spectrum. For the 0{sup ++} (a{sub 0}) meson we see a coupling to two pseudoscalar mesons, or a meson decay on the lattice.},
doi = {10.1103/PhysRevD.64.054506},
journal = {Physical Review D},
issn = {0556-2821},
number = 5,
volume = 64,
place = {United States},
year = {2001},
month = {9}
}