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Project: STRONGNET
(CSV)
  • Funder (7)
  • Project (42)
  • Publication Date (7)
  • Access Mode (1)
  • Type (6)
  • Language (2)
  • Community (1)
  • Content Provider (30)
275 publications, page 1 of 28
  • Stability of complex Langevin dynamics in effective models

    Article, Preprint English OPEN
    Aarts, Gert; James, Frank A.; Pawlowski, Jan M.; Seiler, Erhard; Sexty, Denes; Stamatescu, Ion-Olimpiu; (2012)
    The sign problem at nonzero chemical potential prohibits the use of importance sampling in lattice simulations. Since complex Langevin dynamics does not rely on importance sampling, it provides a potential solution. Recently it was shown that complex Langevin dynamics f...
  • Local CP-violation and electric charge separation by magnetic fields from lattice QCD

    Article, Preprint English OPEN
    Bali, G. S.; Bruckmann, F.; Endrődi, G.; Fodor, Z.; Katz, S. D.; Schäfer, A.; (2014)
    We study local CP-violation on the lattice by measuring the local correlation between the topological charge density and the electric dipole moment of quarks, induced by a constant external magnetic field. This correlator is found to increase linearly with the external ...
  • Electrical conductivity and charge diffusion in thermal QCD from the lattice

    Article, Preprint English OPEN
    Aarts, Gert; Allton, Chris; Amato, Alessandro; Giudice, Pietro; Hands, Simon; Skullerud, Jon-Ivar; (2014)
    We present a lattice QCD calculation of the charge diffusion coefficient, the electrical conductivity and various susceptibilities of conserved charges, for a range of temperatures below and above the deconfinement crossover. The calculations include the contributions f...
  • Determination of low-energy constants of Wilson chiral perturbation theory

    Article, Preprint English OPEN
    Herdoíza, Gregorio; Jansen, Karl; Michael, Chris; Ottnad, Konstantin; Urbach, Carsten; (2013)
    By matching Wilson twisted mass lattice QCD determinations of pseudoscalar meson masses to Wilson Chiral Perturbation Theory we determine the low-energy constants $W'_6$, $W'_8$ and their linear combination $c_2$. We explore the dependence of these low-energy constants ...
  • Charge Symmetry Breaking in Parton Distribution Functions from Lattice QCD

    Article, Preprint English OPEN
    Horsley, R.; Nakamura, Y.; Pleiter, D.; Rakow, P. E. L.; Schierholz, G.; Stüben, H.; Thomas, A. W.; Winter, F.; Young, R. D.; Zanotti, J. M.; (2010)
    By determining the quark momentum fractions of the octet baryons from N_f=2+1 lattice simulations, we are able to predict the degree of charge symmetry violation in the parton distribution functions of the nucleon. This is of importance, not only as a probe of our under...
  • S wave bottomonium states moving in a quark-gluon plasma from lattice NRQCD

    Article, Preprint English OPEN
    Aarts, Gert; Allton, Chris; Kim, Seyong; Lombardo, Maria Paola; Oktay, Mehmet B.; Ryan, Sinead M.; Sinclair, D. K.; Skullerud, Jon-Ivar; (2012)
    We extend our study of bottomonium spectral functions in the quark-gluon plasma to nonzero momentum. We use lattice QCD simulations with two flavours of light quark on highly anisotropic lattices and treat the bottom quark with nonrelativistic QCD (NRQCD). We focus on S...
  • The QCD equation of state in background magnetic fields

    Article, Preprint English OPEN
    Bali, G. S.; Bruckmann, F.; Endrodi, G.; Katz, S. D.; Schafer, A.; (2014)
    We determine the equation of state of 2+1-flavor QCD with physical quark masses, in the presence of a constant (electro)magnetic background field on the lattice. To determine the free energy at nonzero magnetic fields we develop a new method, which is based on an integr...
  • Nucleon structure from lattice QCD - recent achievements and perspectives

    Article, Preprint English OPEN
    Alexandrou, Constantia; (2014)
    We present recent developments in lattice QCD simulations as applied in the study of hadron structure. We discuss the challenges and perspectives in the evaluation of benchmark quantities such as the nucleon axial charge and the isovector parton momentum fraction, as we...
  • Topological index theorem on the lattice through the spectral flow of staggered fermions

    Article, Preprint English OPEN
    Azcoiti, V.Departamento de Física Teórica, Universidad de Zaragoza, Calle Pedro Cerbuna 12, Zaragoza, E-50009, Spain; Follana, E.(Departamento de Física Teórica, Universidad de Zaragoza, Calle Pedro Cerbuna 12, Zaragoza, E-50009, Spain); Vaquero, A.(Departamento de Física Teórica, Universidad de Zaragoza, Calle Pedro Cerbuna 12, Zaragoza, E-50009, Spain); Di Carlo, G.(Laboratori Nazionali del Gran Sasso, Via G. Acitelli, 22, Assergi, L'Aquila, 67100, Italy); (2015)
    We investigate numerically the spectral flow introduced by Adams for the staggered Dirac operator on realistic (quenched) gauge configurations. We obtain clear numerical evidence that the definition works as expected: there is a clear separation between crossings near a...
  • Computation of disconnected contributions to nucleon observables

    Conference object, Preprint English OPEN
    Alexandrou, Constantia; Drach, Vincent; Jansen, Karl; Koutsou, Giannis; Vaquero, Alejandro; (2014)
    We compare several methods for computing disconnected fermion loops contributing to nucleon three-point functions. The comparison is carried out using one ensemble of $N_f=2+1+1$ twisted mass fermions with pion mass of 373 MeV. The complete set of operators up to one-de...
275 publications, page 1 of 28
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