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Now showing items 226-245 of 317

  • QCD Coupling from a Nonperturbative Determination of the Three-Flavor ?? Parameter 

    Sint, Stefan; Fritzsch, Patrick (2017)
    We present a lattice determination of the Λ parameter in three-flavor QCD and the strong coupling at the Z pole mass. Computing the nonperturbative running of the coupling in the range from 0.2 to 70 GeV, and using ...
  • QCD on 2 + 2 anisotropic lattices 

    PEARDON, MICHAEL JAMES; RYAN, SINEAD MARIE (Elsevier, 2003)
    We discuss the implementation of QCD on 2 + 2 anisotropic lattices. Technical details regarding the choice of the action as well as perturbative and non-perturbative improvement are analyzed. The physical applications ...
  • 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 ...
  • Quantization of Integrable Systems and Four Dimensional Gauge Theories 

    SHATASHVILI, SAMSON (2010)
    We study four dimensional N = 2 supersymmetric gauge theory in the ?- background with the two dimensional N = 2 super-Poincare invariance. We explain how this gauge theory provides the quantization of the class ical ...
  • Quantizing three-spin string solution in AdS(5) xS**5 

    FROLOV, SERGEY (Institute of Physics, 2003)
    As was recently found in [3], there exists a simple classical solution describing a closed string rotating in S 5 and located at the center of AdS 5 . It is parametrized by the angular momentum J of the center of mass and ...
  • 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 ...
  • Quantum geometry and quiver gauge theories 

    SHATASHVILI, SAMSON (2013)
    We study macroscopically two dimensional N = (2 , 2) supersymmetric gauge theories constructed by compactifying the quiver gau ge theories with eight su- percharges on a product T d ? R 2 ? of a d -dimensional ...
  • Quantum integrability and supersymmetric vacua 

    SHATASHVILI, SAMSON (2009)
    Supersymmetric vacua of two dimensional N = 4 gauge theories with matter, softly broken by the twisted masses down to N = 2, are shown to be in one-to-one correspondence with the eig enstates of integrable spin chain ...
  • Quantum spectral curve as a tool for a perturbative quantum field theory 

    VOLIN, DMYTRO (2015)
    An iterative procedure perturbatively solving the quantum spectral curve of planar N=4N=4 SYM for any operator in the slsl(2) sector is presented. A Mathematica notebook executing this procedure is enclosed. The obtained ...
  • Quark-gluon plasma phenomenology from anisotropic lattice QCD 

    RYAN, SINEAD (2016)
    The FASTSUM collaboration has been carrying out simulations of N f = 2 + 1 QCD at nonzero temperature in the fixed-scale approach using anisotropic lattices. Here we present the status of these studies, including ...
  • Quark-gluon plasma phenomenology from the lattice 

    RYAN, SINEAD (2014)
    The FASTSUM Collaboration has calculated several quantities relevant for QCD studies at non-zero temperature using the lattice technique. We report here our results for the (i) interquark potential in charmonium; (ii) ...
  • Quark-Gluon Plasma: From lattice simulations to experimental results 

    RYAN, SINEAD (2014)
    Theoretical studies of quarkonia can elucidate some of the important properties of the quark–gluon plasma, the state of matter realised when the temperature exceeds O (150) MeV, currently probed by heavy-ion collisions ...
  • Quenched QCD with O(a) improvement: The spectrum of light hadrons 

    RYAN, SINEAD MARIE (American Physical Society, 2000)
    We present a comprehensive study of the masses of pseudoscalar and vector mesons, as well as octet and decuplet baryons computed in O(a)-improved quenched lattice QCD. Results have been obtained using the nonperturbative ...
  • Quillen homology for operads via Gr?bner bases 

    Dotsenko, Vladimir (2013)
    The main goal of this paper is to present a way to compute Quillen homology of operads. The key idea is to use the notion of a shuffle operad we introduced earlier; this allows to compute, for a symmetric operad, the ...
  • R**4 corrections to conifolds and G(2)-holonomy spaces 

    FROLOV, SERGEY (Elsevier, 2002)
    Motivated by examples that appeared in the context of string theory?gauge theory duality, we consider corrections to supergravity backgrounds induced by higher derivative (R4+cdots, three dots, centered) terms in superstring ...
  • 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 ...
  • Radial and orbital excitations of static-light mesons 

    Ryan, Sinead; Peardon, Michael (2007)
    We present results for the spectrum of static-light mesons from Nf = 2 lattice QCD. These results were obtained using all-to-all light quark propagators on an anisotropic lattice, yielding an improved signal resolution ...