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  • The 2 + 2 anisotropic Wilson gluon action with applications 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2004)
    A generalization of anisotropic lattices to include a 2+2 discretization is discussed. As a part of this program, we determine the one-loop correction to the gluon self-energy and analyse the restoration of Lorentz ...
  • B and D meson decay constants in lattice QCD 

    RYAN, SINEAD MARIE (American Physical Society, 1998)
    We have calculated the decay constants of B and D mesons with lattice QCD. We use an O(a)-improved action that takes light quark actions as a starting point, tuned so that it can be directly applied at the physical masses ...
  • B and D semileptonic decays to light mesons 

    RYAN, SINEAD MARIE (2008-10-09)
    We present an update of our calculation of the form factors and partial widths of semileptonic heavy-to-light meson decays, in the quenched approximation. Our complete data set has now been analysed and our results include ...
  • Bottomonium above deconfinement in lattice nonrelativistic QCD 

    RYAN, SINEAD MARIE (American Physical Society, 2011)
    We study the temperature dependence of bottomonium for temperatures in the range 0.4Tc<T<2.1Tc, using nonrelativistic dynamics for the bottom quark and full relativistic lattice QCD simulations for Nf=2 light flavors on a ...
  • Bottomonium at Non-zero Temperature from Lattice Non-relativistic QCD 

    RYAN, SINEAD MARIE (2011)
    The temperature dependence of bottomonium states at temperatures above and below $T_c$ is presented, using non-relativistic dynamics for the bottom quark and full relativistic lattice QCD simulations for two light flavors ...
  • Charmonium spectroscopy from an anisotropic lattice study 

    LIU, LIUMING; VILASECA MAINAR, POL; PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2011)
    We present a progress report on our study of the charmonium spectrum in full QCD on anisotropic lattices generated by the Hadron Spectrum Collaboration. We adopt a large basis of interpolating operators to extract the ...
  • Charmonium spectroscopy on dynamical anisotropic lattices 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE; SKULLERUD, JONIVAR (Elsevier, 2006)
    We present a first study of the charmonium spectrum on Nf = 2 dynamical, anisotropic lattices. We take advantage of all-to-all quark propagators to build spatially extended interpolating operators to increase the overlap ...
  • Dynamical QCD simulations on anisotropic lattices 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2006)
    The simulation of QCD on dynamical ( N f 2 ) anisotropic lattices is described. A method for nonperturbative renormalisation of the parameters in the anisotropic gauge and quark actions is presented. The precision ...
  • Effect of tree-level and mean-field improvement on the light-hadron spectrum in quenched QCD 

    RYAN, SINEAD MARIE (American Physical Society, 1997)
    We compute the light-hadron mass spectrum at b55.7 using the O(a)-improved Sheikholeslami-Wohlert fermion action with two choices of the clover coefficient: the classical value c51 and a mean-field or tadpole-improved ...
  • Estimated errors in |Vcd|/|Vcs| from semileptonic D decays 

    RYAN, SINEAD MARIE (Elsevier, 1999)
    We estimate statistical and systematic errors in the extraction of the CKM ratio |Vcd|/|Vcs| from exclusive D-meson semileptonic decays using lattice QCD and anticipated new experimental results.
  • Excited-Nucleon Spectroscopy with 2+1 Flavour Fermions 

    RYAN, SINEAD MARIE (2009)
    We present progressmade by the Hadron SpectrumCollaboration (HSC) in determining the tower of excited nucleon states using 2+1-flavor anisotropic clover lattices. The HSC has been investigating interpolating operators ...
  • First results from 2+1 dynamical quark flavors on an anisotropic lattice: Light-hadron spectroscopy and setting the strange-quark mass 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (2009)
    We present the first light-hadron spectroscopy on a set of N f ? 2 ? 1 dynamical, anisotropic lattices. A convenient set of coordinates that parameterize the two-dimensional plane of light and strange-quark masses ...
  • Gauge theories on a 2+2 anisotropic lattice 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (American Physical Society, 2003)
    The implementation of gauge theories on a four-dimensional anisotropic lattice with two distinct lattice spacings is discussed, with special attention to the case where two axes are finely and two axes are coarsely discretized. ...
  • Heavy hadrons on an anisotropic lattice 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (Elsevier, 2004)
    Results from simulations of quarkonia and heavy-light mesons on an anisotropic lattice are presented. The improved quark action and action-parameter tuning used in this study are discussed.
  • Heavy quark physics from lattice QCD 

    RYAN, SINEAD MARIE (Elsevier, 2002)
    I review the current status of lattice calculations of heavy quark quantities. Particular emphasis is placed on leptonic and semileptonic decay matrix elements.
  • Improving Algorithms to Compute All Elements of the Lattice Quark Propagator 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE; SKULLERUD, JONIVAR (Elsevier, 2005)
    We present a new exact algorithm for estimating all elements of the quark propagator. The advantage of the method is that the exact all-to-all propagator is reproduced in a large but finite number of inversions. The ...