UScholar Works
 
Filters: Collection: "ir_uspace" Subject: "Chiral symmetry"
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CreatorTitleDescriptionSubjectDate
1 DeTar, CarletonQuenched hadron spectroscopy with improved staggered quark actionWe investigate light hadron spectroscopy with an improved quenched staggered quark action. We compare the results obtained with an improved gauge plus an improved quark action, an improved gauge plus standard quark action, and the standard gauge plus standard quark action. Most of the improvement ...Staggered quarks; Chiral symmetry; Flavor symmetry1998-07
2 DeTar, CarletonQCD thermodynamics with two flavors at Nt=6The first results of numerical simulations of quantum chromodynamics on the Intel iPSC/860 parallel processor are presented. We performed calculations with two flavors of Kogut-Susskind quarks at Nt = 6 with masses of 0.15T and 0.075T (0.025 and 0.0125 in lattice units) in order to locate the crosso...Kogut-Susskind quarks; Crossover temperature; Chiral symmetry; Polyakov loop; Phase transitions1992-05
3 DeTar, CarletonQuark-bag model with low-energy pion interactions. II. ApplicationThe hybrid pion-quark-bag model discussed in I is applied to a calculation of masses, pion couplings, and other parameters of various light hadrons in an effort to determine the extent to which the bag parameters must be modified in the presence of pion interactions. Corrections for the finite spr...Bag models; Quark bag; Chiral symmetry; Pion field; Nucleons1981-08
4 DeTar, CarletonQCD thermodynamics with an improved lattice actionWe have investigated QCD with two flavors of degenerate fermions using the Symanzik-improvement program for both the gauge and fermion actions. Our study focuses on the deconfinement transition on an Nt=4 lattice. Having located the thermal transition, we performed zero temperature simulations nea...Wilson fermions; Polyakov loop; Chiral symmetry; Phase transitions1997-11
5 DeTar, CarletonEquation of state for two flavor QCD at Nt=6We calculate the two flavor equation of state for QCD on lattices with lattice spacing a=(6T)21 and find that cutoff effects are substantially reduced compared to an earlier study using a=(4T)21. However, it is likely that significant cutoff effects remain. We fit the lattice data to expected forms ...Phase transitions; Quark-gluon plasma; Chiral symmetry1997-06
6 DeTar, CarletonEquation of state and QCD transition at finite temperatureWe calculate the equation of state in 2 + 1 flavor QCD at finite temperature with physical strange quark mass and almost physical light quark masses using lattices with temporal extent Nr = 8. Calculations have been performed with two different improved staggered fermion actions, the asqtad and p4 a...Deconfinement; Chiral symmetry; Staggered fermions; Phase transitions; Polyakov loop2009-07
7 DeTar, CarletonHadronic spectrum of the quark plasmaWe have carried out a numerical simulation in SU(3) lattice gauge theory with four flavors of low-mass staggered fermions at zero baryon-number density in the vicinity of the high-temperature phase transition on 6x 103 and 6x 102x20 lattices. Static screening masses (static susceptibilities) were m...Hadronic matter; Quark plasma; Chiral symmetry; Phase transitions1987-07
8 DeTar, CarletonMeasuring the hadronic spectrum of the quark plasmaIn an effort to characterize the large-scale structure and composition of the Q C D plasma at zero baryon-number density in the vicinity of the high-temperature phase transition, we have carried out a numerical simulation in SU(3) lattice gauge theory with four flavors of low-mass staggered fermions...Quark plasma; Gluon plasma; Hadronic matter; Deconfinement; Chiral symmetry; Phase transitions1987-11
9 DeTar, CarletonQCD thermodynamics with two flavors of Wilson quarks at Nt=6We report on a study of hadron thermodynamics with two flavors of Wilson quarks on 123 X6 lattices. We have studied the crossover between the high- and low-temperature regimes for three values of the hopping parameter, K=0. 16, 0.17, and 0.18. At each of these values of K we have carried out spect...Wilson quarks; Staggered quarks; Chiral symmetry; Phase transitions1992-11
10 DeTar, CarletonQuark-bag model with low-energy pion interactions. I. TheoryA standard method for restoring chiral symmetry in the bag model is to introduce an explicit external pion field. Questions of the consistency and compatibility of this method with the assumptions of the static-cavity approximation of the bag model are discussed. An approximate version of the mode...Bag models; Quark bag; Chiral symmetry; Pion bag; Pion field1981-08
11 DeTar, CarletonRole of baryons in chiral-symmetry restoration at high temperatureTo help provide insight into the apparent remarkable rise in baryon susceptibility at the high-temperature phase transition in QCD, we study the three-dimensional lattice SU(2) chiral model at finite temperature. The purpose of this study is to determine the extent to which a rising susceptibility i...Chiral model; Chiral symmetry; Quark plasma; Skyrmions; Phase transitions1990-07
12 DeTar, CarletonThermodynamics for two flavor QCD*We conclude our analysis of the Nt = 6 equation of state (EOS) for two flavor QCD, first described at last year's conference. We have obtained new runs at amq = 0.025 and improved runs at amq = 0.0125. The results are extrapolated to mq = 0, and we extract the speed of sound as well. We also present...Phase transitions; Quark-gluon plasma; Chiral symmetry1997-02
13 DeTar, CarletonToward an effective chiral model of high-temperature QCDIn an effort to expose the mechanism for chiral-symmetry restoration in high-temperature QCD, we use numerical simulations of lattice QCD with staggered fermions to obtain information about possible effective chiral models. We propose the strategy of comparing expressions built from expectation val...Chiral model; Meson fields; Chiral symmetry; Phase transitions1992-06
14 DeTar, CarletonLight pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCDAs part of our program of lattice simulations of three-flavor QCD with improved staggered quarks, we have calculated pseudoscalar meson masses and decay constants for a range of valence quark masses and sea-quark masses on lattices with lattice spacings of about 0.125 and 0.09 fm. We fit the lattic...Staggered quarks; Chiral symmetry; Perturbation theory2004-12
15 DeTar, CarletonWhich chiral symmetry is restored in high temperature quantum chromodynamics?Sigma models for the high temperature phase transition in quantum chromodynamics suggest that at high temperature the SU(Nf) X 3 SU(Nf) chiral symmetry becomes exact, but the anomalous axial U(1) symmetry need not be restored. In numerical lattice simulations, traditional methods for detecting symme...Chiral symmetry; Staggered fermions; Phase transitions1997-01
16 DeTar, CarletonPhenomenological lattice model of the high-temperature phase transition in quantum chromodynamicsWe propose a simple phenomenological lattice model for the high-temperature phase transition in a quark-gluon plasma, in which the elementary dynamical variables are Wilson lines and SU(iV) chiral spins. A mean-field analysis of the model shows a second-order chiral phase transition for N=2 and a fi...Quark plasma; Gluon plasma; Chiral symmetry; Phase transitions1987-06
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