279 research outputs found

    Monopoles and the Chiral Phase Transition in SU(2)SU(2) Lattice Gauge Theory

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    In the quenched approximation we use the abelian and monopole fields from abelian projection in SU(2) lattice gauge theory to numerically compute the value of the chiral condensate. The condensate calculated using abelian projection is observed to vanish at the same critical temperature as the full SU(2) theory predicts.Comment: 3 pages, 3 Postscript figures, uses espcrc2.sty and psfig.sty, Talk presented at LATTICE96(topology

    Monopoles in High Temperature Phase of SU(2) QCD

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    We investigated a behavior of monopole currents in the high temperature phase of abelian projected finite temperature SU(2) QCD in maximally abelian gauge. Wrapped monopole currents which are closed by periodic boundary play an important role for the spatial string tension. And the wrapped monopole current density seems to be non-vanishing in the continuum limit. These results may be related to Polyakov's analysis of the confinement mechanism using monopole gas in 3-dimensional SU(2) gauge theory with Higgs fields.Comment: 4pages (3 figures), Latex, Contribution to Lattice 9

    Structure of flux tube in SU(2) lattice gauge theory

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    The structure of the flux tube is studied in SU(2)SU(2) QCD from the standpoint of the abelian projection theory. It is shown that the flux distributions of the orthogonal electric field and the magnetic field are produced by the effect that the abelian monopoles in the maximally abelian (MA) gauge are expelled from the string region.Comment: 3 pages, uuencoded compressed file, contribution to Lattice '9

    The second order QCD contribution to the semileptonic b -> u decay rate

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    The order alpha_s^2 contribution to the inclusive semileptonic decay width of a b quark \Gamma(b -> X_u e \bar{\nu}_e) is calculated analytically for zero mass u quarks.Comment: 10 pages, 1 figur

    Nonperturbative three-point functions of the O(N) sigma model in the 1/N expansion at NLO

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    We present a calculation of the three-point functions of the O(N)-symmetric sigma model. The calculation is done nonperturbatively by means of a higher-order 1/N expansion combined with a tachyonic regularization which we proposed in previous publications. We use the results for calculating the standard model process ff -> H -> WW nonperturbatively in the quartic coupling of the scalar sector

    Expansion of Medication Therapy Management Services to Rural Sites for Patients with an Employer-Sponsored Health Plan

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    Previous literature supports that pharmaceutical care provider in the ambulatory care setting can improve clinical, economic, and humanistic outcomes for recipients, and when utilized in employer-provided health plans can lead to reduced spending on healthcare costs by employers. A large health system in central Minnesota offers an Employee Medication Therapy Management (MTM) benefit that offers further financial incentives to meet with an MTM Pharmacist for a comprehensive review of one’s medications. Currently, this program is underutilized due to both lack of awareness of the program and geographic for employees in the wester region of the health system. This project sought to increase the utilization of the Employee MTM program and advocate for ambulatory pharmacy services across the far reaches of the health system

    The hermitian Wilson-Dirac operator in smooth SU(2) instanton backgrounds

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    We study the spectral flow of the hermitian Wilson-Dirac operator \ham(m) as a function of mm in smooth SU(2) instanton backgrounds on the lattice. For a single instanton background with Dirichlet boundary conditions on \ham(m), we find a level crossing in the spectral flow of \ham(m), and we find the shape of the crossing mode at the crossing point to be in good agreement with the zero mode associated with the single instanton background. With anti-periodic boundary conditions on \ham(m), we find that the instanton background in the singular gauge has the correct spectral flow but the one in regular gauge does not. We also investigate the spectral flows of two instanton and instanton-anti-instanton backgrounds.Comment: 18 pages, Latex file, 12 postscript figure

    Monopole Condensation and Polyakov Loop in Finite-Temperature Pure QCD

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    We study the relation between the abelian monopole condensation and the deconfinement phase transition of the finite-temperature pure QCD. The expectation value of the monopole contribution to the Polyakov loop becomes zero when a long monopole loop is distributed uniformly in the configuration of the confinement phase. On the other hand, it becomes non-zero when the long monopole loop disappears in the deconfinement phase. We also discuss the relation between the monopole behaviors and the usual interpretation of the spontaneous breaking of Z(N) symmetry in finite-temperature SU(N) QCD. It is found that the boundary condition of the space direction is important to understand the Z(N) symmetry in terms of the monopoles.Comment: 3 pages, latex, 8 figures, Talk presented at LATTICE96(topology

    Nature of the Vacuum inside the Color Flux Tube

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    The interior of the color flux tube joining a quark pair can be probed by evaluating the correlator of pair of Polyakov loops in a vacuum modified by another Polyakov pair, in order to check the dual superconductivity conjecture which predicts a deconfined, hot core. We also point out that at the critical point of any 3D gauge theories with a continuous deconfining transition the Svetitsky-Yaffe conjecture provides us with an analytic expression of the Polyakov correlator as a function of the position of the probe inside the flux tube. Both these predictions are compared with numerical results in 3D Z2 gauge model finding complete agreement.Comment: 3 pages, Talk presented at LATTICE96(topology

    Dual vortices in Abelian projected SU(2) in the Polyakov gauge

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    We study dual Abrikosov vortices in Abelian projected SU(2) gauge theory in the Polyakov gauge. We show that vortices are present in this gauge but they are suppressed with respect to the maximal Abelian gauge. We interpret this difference in terms of the shielding of the electric charge by the charged coset fields.Comment: Talk presented at LATTICE96(topology), 3 pages, latex, 4 eps figures, uses epsfig and espcrc2.sty (included
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