Search results for "Green functions"

showing 2 items of 2 documents

Three-gluon Green functions: low-momentum instanton dominance and zero-crossing

2016

International audience; We will report on a some efforts recently made in order to gain a better understanding of some IR properties of the 3-point gluon Green function by following both lattice and continuum QCD approaches.

Low-momentumParticle physicsInstantonQC1-999High Energy Physics::Lattice01 natural sciencesGluonTheoretical physicsLattice (order)quantum chromodynamics0103 physical sciencesddc:530010306 general physicsGreen functionslatticePhysicsQuantum chromodynamics010308 nuclear & particles physicsPhysicsHigh Energy Physics::PhenomenologygluonZero crossingGluonZero-crossing[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]instantonHigh Energy Physics::Experimentmomentum: lowEPJ Web of Conferences
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Model nuclear energy density functionals derived from ab initio calculations

2020

We present the first application of a new approach, proposed in [Journal of Physics G: Nuclear and Particle Physics, 43, 04LT01 (2016)] to derive coupling constants of the Skyrme energy density functional (EDF) from ab initio Hamiltonian. By perturbing the ab initio Hamiltonian with several functional generators defining the Skyrme EDF, we create a set of metadata that is then used to constrain the coupling constants of the functional. We use statistical analysis to obtain such an ab initio-equivalent Skyrme EDF. We find that the resulting functional describes properties of atomic nuclei and infinite nuclear matter quite poorly. This may point out to the necessity of building up the ab init…

Nuclear and High Energy PhysicsNuclear Theoryab initio methodstilastomenetelmätNuclear TheoryAb initioFOS: Physical sciences114 Physical sciences01 natural sciences7. Clean energyNuclear Theory (nucl-th)symbols.namesakeAb initio quantum chemistry methodsQuantum mechanics0103 physical sciences010306 general physicsGreen functionsPhysicsCoupling constantEnergy density functionalnuclear density functional theory010308 nuclear & particles physicstiheysfunktionaaliteoriaNuclear matterAtomic nucleusEnergy densitysymbolsstatistical methodsHamiltonian (quantum mechanics)ydinfysiikka
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