12,831 research outputs found

    On Charmonia Survival Above Deconfinement

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    We study charmonium correlators and spectral functions at zero and finite temperature using anisotropic lattices at several different lattice spacings. We find evidence for survival of 1S charmonia states at leas till 1.5Tc1.5T_c and dissolution of 1P states at 1.16Tc1.16T_c.Comment: contribution to the 29th Johns Hopkins Workshop in Theoretical Physics, Budapest, Hungary, 1-3 August 200

    Z(3) Symmetric Dimensional Reduction of (2+1)D QCD

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    Here we present a candidate for a Z(3)-symmetric reduced action for the description of the (2+1)D SU(3) gauge theoryComment: 2 pages, Statistical QCD pro

    The VLBA Calibrator Search for the BeSSeL Survey

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    We present the results of a survey of radio continuum sources near the Galactic plane using the Very Long Baseline Array (VLBA). Our observations are designed to identify compact extragalactic sources of milliarcsecond size that can be used for parallax measurements in the Bar and Spiral Structure Legacy Survey. We selected point sources from the NVSS and CORNISH catalogs with flux densities above 30 mJy and within 1.5\degr of known maser targets. Of the 1529 sources observed, 199 were detected. For sources detected on 3 or more baselines, we determined accurate positions and evaluated their quality as potential calibrators. Most of the 1330 sources that were not detected with the VLBA are probably of extragalactic origin.Comment: 27 pages, 3 figures, 3 tables. Table 3 is available on the homepage of the BeSSeL survey: http://www.mpifr-bonn.mpg.de/staff/abrunthaler/BeSSeL/index.shtm

    Gauge model at finite temperature with massive quarks and at finite density on anisotropic lattice

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    Critical properties of QCD and the chiral condensate at finite density are analytically studied on an anisotropic lattice in the approximation SU(N) \simeq Z(N). Asymptotic behavior of the partition function and its continuum limit are discussed.Comment: talk given by L.A.Averchenkova at LATTICE'98, Boulder, CO, USA, 13-18 July 1998, 3 pages, LaTex, no figure
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