Results 21 to 30 of about 487,040 (231)

On the role of isospin violation in the pion–nucleon σ-term

Physics Letters B, 2023
In recent years, a persistent tension between phenomenological and lattice QCD determinations of the pion–nucleon σ-term σπN has developed. In particular, lattice-QCD calculations have matured to the point that isospin-violating effects need to be ...
Martin Hoferichter, Jacobo Ruiz de Elvira, Bastian Kubis, Ulf-G. Meißner   +3 more
doaj   +1 more source

Excited bottomonia in quark-gluon plasma from lattice QCD

Physics Letters B, 2020
We present the first lattice QCD study of up to 3S and 2P bottomonia at non-zero temperatures. Correlation functions of bottomonia were computed using novel bottomonium operators and a variational technique, within the lattice non-relativistic QCD ...
Rasmus Larsen, Stefan Meinel, Swagato Mukherjee, Peter Petreczky   +3 more
doaj   +1 more source

Localization in lattice QCD [PDF]

Physical Review D, 2003
In this paper, we examine the phase diagram of quenched QCD with two flavors of Wilson fermions, proposing the following microscopic picture. The super-critical regions inside and outside the Aoki phase are characterized by the existence of a density of near-zero modes of the (hermitian) Wilson-Dirac operator, and thus by a non-vanishing pion ...
Golterman, Maarten, Shamir, Yigal
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Logarithmic corrections in Symanzik’s effective theory of lattice QCD [PDF]

, 2021
Einer der finalen Schritte in Simulationen von Gitter Quantenchromodynamik (QCD) oder Gittereichtheorie ist die Kontinuumsextrapolation, um die eigentliche Kontinuumsphysik zu extrahieren.
Husung, Nikolai
core   +1 more source

PREDICTIVE LATTICE QCD [PDF]

International Journal of Modern Physics A, 2006
In the past year, we calculated with lattice QCD three quantities that were unknown or poorly known. They are the q2 dependence of the form factor in semileptonic D → Klν decay, the decay constant of the D meson, and the mass of the Bc meson. In this talk, we summarize these calculations, with emphasis on their (subsequent) confirmation by experiments.
S. Kronfeld, Andreas, F. Allison, I., Aubin, C., Bernard, C., T. H. Davies, C., DeTar, C., Di Pierro, M., D. Freeland, E., Gottlieb, Steven, Gray, A., Gregory, E., M. Heller, U., E. Hetrick, J., X. El-Khadra, A., Levkova, L., B. Mackenzie, P., Maresca, F., Menscher, D., Nobes, M., Okamoto, M., B. Oktay, M., Osborn, J., Renner, D., N. Simone, J., Sugar, R., Toussaint, D., D. Trottier, H.   +26 more
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Aspects of chiral transition in a Hadron Resonance Gas model [PDF]

EPJ Web of Conferences, 2022
We study the chiral condensate for 2 + 1 flavor QCD with physical quarks within a non-interacting Hadron Resonance Gas (HRG) model. By including the latest information on the mass variation of the hadrons concerning the light quark mass, from lattice QCD
Biswas Deeptak, Petrezcky Peter, Sharma Sayantan   +2 more
doaj   +1 more source

Datagrids for lattice QCD [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006
Abstract As the need for computing resources to carry out numerical simulations of Quantum Chromodynamics (QCD) formulated on a lattice has increased significantly, efficient use of the generated data has become a major concern. To improve on this, groups plan to share their configurations on a worldwide level within the International Lattice ...
Büchner, O., Ernst, M., Jansen, K., Lippert, Th., Melkumyan, D., Orth, B., Pleiter, D., Stüben, H., Wegner, P., Wollny, S.   +9 more
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Lattice QCD thermodynamics on the Grid [PDF]

Computer Physics Communications, 2010
We describe how we have used simultaneously ${\cal O}(10^3)$ nodes of the EGEE Grid, accumulating ca. 300 CPU-years in 2-3 months, to determine an important property of Quantum Chromodynamics. We explain how Grid resources were exploited efficiently and with ease, using user-level overlay based on Ganga and DIANE tools above standard Grid software ...
Jakub T. Moscicki, Maciej Wos, Massimo Lamanna, Philippe de Forcrand, Owe Philipsen   +4 more
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Low-energy constants in the chiral Lagrangian with baryon octet and decuplet fields from Lattice QCD data on CLS ensembles

European Physical Journal C: Particles and Fields, 2023
We perform an analysis of Lattice QCD data on baryon octet and decuplet masses based on the chiral SU(3) Lagrangian. Low-energy constants (LEC) are adjusted to describe baryon masses from a large set of CLS ensembles, where finite-box and discretization ...
Matthias F. M. Lutz, Yonggoo Heo, Xiao-Yu Guo   +2 more
doaj   +1 more source

Hot QCD on the Lattice [PDF]

Progress of Theoretical Physics Supplement, 2007
We review lattice results that probe properties of high temperature QCD at different length scales and can help to elucidate its non-perturbative structure. We examine the flavor and chemical potential dependence of electric and magnetic screening lengths as well as the QCD equation of state.
openaire   +1 more source