62,683 research outputs found

    The Accountability and Independence of the Auditors-General of Australia: A Comparison of their Enabling Legislation

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    This paper compares the enabling legislation of the nine auditors-general of Australia from perspectives of public-sector accountability and auditor independence. Following on from the Joint Committee of Public Accounts (JCPA) 1989 and 1996 reports, and in particular English and Guthrie (2000), this study finds general similarities in the enabling legislation for all auditors-general, and striking similarities between the legislation of the commonwealth and Victoria. The policy implications of this study's findings are that for all auditors-general provisions in their enabling legislation could be further strengthened

    Testing Algorithms for Finite Temperature Lattice QCD

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    We discuss recent algorithmic improvements in simulating finite temperature QCD on a lattice. In particular, the Rational Hybrid Monte Carlo(RHMC) algorithm is employed to generate lattice configurations for 2+1 flavor QCD. Unlike the Hybrid R Algorithm, RHMC is reversible, admitting a Metropolis accept/reject step that eliminates the O(δt2)\mathcal{O}(\delta t^2) errors inherent in the R Algorithm. We also employ several algorithmic speed-ups, including multiple time scales, the use of a more efficient numerical integrator, and Hasenbusch pre-conditioning of the fermion force.Comment: 4 pages, 2 figures, poster presented at International Conference on Strong and Electroweak Matter 2006 (SEWM2006), BNL, May 10-13, 200

    The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions

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    We describe an implementation of the Rational Hybrid Monte Carlo (RHMC) algorithm for dynamical computations with two flavours of staggered quarks. We discuss several variants of the method, the performance and possible sources of error for each of them, and we compare the performance and results to the inexact R algorithm.Comment: Lattice2003(machine) 3 pages, 1 figure. Added referenc

    The supercharge and superconformal symmetry for N=1 supersymmetric quantum mechanics

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    The superspace Lagrangian formulation of N=1 supersymmetric quantum mechanics is presented. The general Lagrangian constructed out of chiral and antichiral supercoordinates containing up to two derivatives and with a canonically normalized kinetic energy term describes the motion of a nonrelativistic spin 1/2 particle with Land\'e g-factor 2 moving in two spatial dimensions under the influence of a static but spatially dependent magnetic field. Noether's theorem is derived for the general case and is used to construct superspace dependent charges whose lowest components give the superconformal generators. The supercoordinate of charges containing an R symmetry charge, the supersymmetry charges and the Hamiltonian are combined to form a supercharge supercoordinate. Superconformal Ward identities for the quantum effective action are derived from the conservation equations and the source of potential symmetry breaking terms are identified.Comment: 59 pages, LaTe

    Algorithm Shootout: R versus RHMC

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    We present initial results comparing the RHMC and R algorithms on large lattices with small quark masses using chiral fermions. We also present results concerning staggered fermions near the deconfinement/chiral phase transition. We find that the RHMC algorithm not only eliminates the step-size error of the R algorithm, but is also considerably more efficient. We discuss several possibilities for further improvement to the RHMC algorithm.Comment: Proceedings from Lattice 2005 (Dublin

    On the Holomorphic Structure of a Low Energy Supersymmetric Wilson Effective Action

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    The Wilson (exact) renormalization group equations are used to determine the evolution of a general low energy N=1 supersymmetric action containing a U(1) gauge vector multiplet and a neutral chiral multiplet. The effective theory evolves towards satisfying a fixed relation where the K\"ahler potential and effective gauge coupling are obtained from a N=2 supersymmetric holomorphic prepotential.Comment: 10 pages, LaTe
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