Spectroscopy, Equation Of State And Monopole Percolation In Lattice Qed With 2 Flavors

    Authors

    S. J. Hands; A. Kocic; J. B. Kogut; R. L. Renken; D. K. Sinclair;K. C. Wang

    Comments

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    Abbreviated Journal Title

    Nucl. Phys. B

    Keywords

    CRITICAL EXPONENTS; GAUGE-THEORIES; FERMIONS; LIMIT; Physics, Particles & Fields

    Abstract

    Non-compact lattice QED with two flavors of light dynamical quarks is simulated on 16(4) lattices, and the chiral condensate, monopole density and susceptibility and the meson masses are measured. Data from relatively high statistics runs at relatively small bare fermion masses of 0.005, 0.01, 0.02 and 0.03 (lattice units) are presented. Three independent methods of data analysis indicate that the critical point occurs at beta = 0.225(5) and that the monopole condensation and chiral symmetry breaking transitions are coincident. The monopole condensation data satisfies finite-size scaling hypotheses with critical indices compatible with four-dimensional percolation. The best chiral equation of state fit produces critical exponents (delta = 2.31, beta(mag) = 0.763) which deviate significantly from mean field expectations. Data for the ratio of the sigma to pion masses produces an estimate of the critical index delta in good agreement with chiral condensate measurements. In the strong coupling phase the ratio of the meson masses are M(sigma)2/M(rho)2 almost-equal-to 0.35, M(A)1(2)/M(rho)2 almost-equal-to 1.4 and M(pi)2/M(rho)2 almost-equal-to 0.0, while on the weak coupling side of the transition M(pi)2/M(rho)2 almost-equal-to 1.0, M(A)1(2)/M(rho)2 almost-equal-to 1.0, indicating the restoration of chiral symmetry.

    Journal Title

    Nuclear Physics B

    Volume

    413

    Issue/Number

    1-2

    Publication Date

    1-1-1994

    Document Type

    Article

    Language

    English

    First Page

    503

    Last Page

    534

    WOS Identifier

    WOS:A1994MZ28300020

    ISSN

    0550-3213

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