Browsing Pure & Applied Mathematics by Date of Publication

Now showing items 41-60 of 390

    • Spectroscopy of Bs and Ds mesons 

      RYAN, SINEAD MARIE (Elsevier, 1998)
      We study Bs and Ds spectroscopy in quenched lattice QCD using the Fermilab approach to heavy quarks. We obtain results at four lattice spacings, a, using O(a)-improved Wilson quarks. We compare and contrast the various ...

    • Glueball matrix elements on anisotropic lattices 

      PEARDON, MICHAEL JAMES (Elsevier, 1998)
      We describe a lattice calculation of the matrix elements relevant for glueball production in J/ radiative decays. The techniques for such a calculation on anisotropic lattices with an improved action are outlined. We ...

    • Coarse lattice results for glueballs and hybrids 

      PEARDON, MICHAEL JAMES (Elsevier, 1998)
      A review of new results from lattice simulations of glueballs and heavy-quark hybrid mesons is presented.

    • Quantum Dynamical R-matrices and Quantum Frobenius Group 

      FROLOV, SERGEY (Springer Verlag, 1998)
      We propose an algebraic scheme for quantizing the rational Ruijsenaars-Schneider model in the R-matrix formalism. We introduce a special parameterization of the cotangent bundle over GL(N,C). In new variables the standard ...

    • 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 ...

    • R-matrix quantization of the elliptic Ruijsenaars-Schneider model 

      FROLOV, SERGEY (Springer Verlag, 1998)
      It is shown that the classical L-operator algebra of the elliptic Ruijsenaars-Schneider model can be realized as a subalgebra of the algebra of functions on the cotangent bundle over the centrally extended current group ...

    • On Lorentz invariance and supersymmetry of four particle scattering amplitudes in S(N) R**8 orbifold sigma model 

      FROLOV, SERGEY (American Physical Society, 1999)
      The SNR8 supersymmetric orbifold sigma model is expected to describe the Infrared limit of the matrix string theory. In the framework of the model the type IIA string interaction is governed by a vertex which was recently ...

    • Progress in leptonic and semileptonic decays in lattice QCD 

      RYAN, SINEAD MARIE (American Physical Society, 1999)
      The status of lattice calculations of heavy quark phenomenology is reviewed. Particular emphasis is placed on the understanding and control of the calculational uncertainties. The ensuing implications for constraining ...

    • The centre of the graph and moduli algebras at roots of 1 

      FROLOV, SERGEY (Springer Verlag, 1999)
      The structure of the centres Z(Lg) and Z(Mg) of the graph algebra Lg(sl2) and the moduli algebraMg(sl2) is studied at roots of 1. It it shown that Z(Lg) can be endowed with the structure of the Poisson graph algebra. The ...

    • Glueball spectrum from an anisotropic lattice study 

      PEARDON, MICHAEL JAMES (American Physical Society, 1999)
      The spectrum of glueballs below 4 GeV in the SU~3! pure-gauge theory is investigated using Monte Carlo simulations of gluons on several anisotropic lattices with spatial grid separations ranging from 0.1 to 0.4 fm. Systematic ...

    • 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.

    • On the origin of supergravity boundary terms in the AdS/CFT correspondence 

      FROLOV, SERGEY (Elsevier, 1999)
      The standard formulation of the AdS/CFT correspondence is incomplete since it requires adding to a supergravity action some a priori unknown boundary terms. We suggest a modification of the correspondence principle based ...

    • Scalar Quartic Effective Action on AdS5 

      FROLOV, SERGEY (1999)
      We review the recent results concerning the computation of cubic and quartic couplings of scalar fields in type IIB supergravity on AdS5 ? S5 background that are dual to (extended) chiral primary operators in N = 4 SYM4. ...

    • Three-point Green function of the stress-energy tensor in the AdS/CFT correspondence 

      FROLOV, SERGEY (Institute of Physics, 1999)
      We compute the three-point function of the stress-energy tensor in d-dimensional conformal field theory CFT from AdSd11 gravity. For d54 the coefficients of the three linearly independent conformally covariant forms ...

    • In search of a scaling scalar glueball 

      PEARDON, MICHAEL JAMES (Elsevier, 1999)
      Anisotropic lattices are an efficient means of studying the glueballs of QCD, however problems arise with simulations of the lightest, scalar state. The mass is strongly dependent on the lattice spacing, even when ...

    • Instanton vibrations of the 3-Skyrmion 

      HOUGHTON, CONOR JAMES (American Physical Society, 1999)
      The Atiyah-Drinfeld-Hitchin-Manin matrix corresponding to a tetrahedrally symmetric 3-instanton is calculated. Some small variations of the matrix correspond to vibrations of the instanton-generated 3-Skyrmion. These ...

    • Quadratic action for type IIB supergravity on AdS(5) x S(5) 

      FROLOV, SERGEY (Institute of Physics, 1999)
      The quadratic action for physical fields of type IIB supergravity model on AdS5?S5 is derived starting from the recently found covariant action. All boundary terms that have to be added to the action to be used in the ...