Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Campagnari Davide"'
Publikováno v:
EPJ Web of Conferences, Vol 137, p 03004 (2017)
Dyson–Schwinger equations are an established, powerful non-perturbative tool for QCD. In the Hamiltonian formulation of a quantum field theory they can be used to perform variational calculations with non-Gaussian wave functionals. By means of the
Externí odkaz:
https://doaj.org/article/7b4f2fa3f5d744c9af9b82d506d2bf3e
We investigate the equal-time (static) quark propagator in Coulomb gauge within the Hamiltonian approach to QCD in $d=2$ spatial dimensions. Although the underlying Clifford algebra is very different from its counterpart in $d=3$, the gap equation fo
Externí odkaz:
http://arxiv.org/abs/2005.06924
Autor:
Campagnari, Davide, Reinhardt, Hugo
Publikováno v:
Phys. Rev. D 100, 114042 (2019)
We investigate the equal-time (static) quark propagator in Coulomb gauge within the Hamiltonian approach to QCD. We use a non-Gaussian vacuum wave functional which includes the coupling of the quarks to the spatial gluons. The expectation value of th
Externí odkaz:
http://arxiv.org/abs/1911.04158
A novel approach to the Hamiltonian formulation of quantum field theory at finite temperature is presented. The temperature is introduced by compactification of a spatial dimension. The whole finite-temperature theory is encoded in the ground state o
Externí odkaz:
http://arxiv.org/abs/1811.03380
Autor:
Campagnari, Davide, Reinhardt, Hugo
Publikováno v:
Phys. Rev. D 97, 054027 (2018)
The variational Hamiltonian approach to Quantum Chromodynamics in Coulomb gauge is investigated within the framework of the canonical recursive Dyson--Schwinger equations. The dressing of the quark propagator arising from the variationally determined
Externí odkaz:
http://arxiv.org/abs/1801.02045
Dyson--Schwinger equations are an established, powerful non-perturbative tool for QCD. In the Hamiltonian formulation of a quantum field theory they can be used to perform variational calculations with non-Gaussian wave functionals. By means of the D
Externí odkaz:
http://arxiv.org/abs/1610.06456
Publikováno v:
Phys. Rev. D 94, 074027 (2016)
The variational approach to QCD in Coulomb gauge is revisited. By assuming the non-Abelian Coulomb potential to be given by the sum of its infrared and ultraviolet parts, i.e.~by a linearly rising potential and an ordinary Coulomb potential, and by u
Externí odkaz:
http://arxiv.org/abs/1608.06820
Autor:
Campagnari, Davide R., Reinhardt, Hugo
Publikováno v:
Phys. Rev. D 92, 065021 (2015)
The general method for treating non-Gaussian wave functionals in the Hamiltonian formulation of a quantum field theory, which was previously proposed and developed for Yang--Mills theory in Coulomb gauge, is generalized to full QCD. For this purpose
Externí odkaz:
http://arxiv.org/abs/1507.01414
Publikováno v:
Phys. Rev. D 91, 025014 (2015)
The canonical recursive Dyson--Schwinger equations for the three-gluon and ghost-gluon vertices are solved numerically. The employed truncation includes several previously neglected diagrams and includes back-coupling effects. We find an infrared fin
Externí odkaz:
http://arxiv.org/abs/1410.4766
Autor:
Campagnari, Davide R., Reinhardt, Hugo
We study the static gluon and quark propagator of the Hamiltonian approach to Quantum Chromodynamics in Coulomb gauge in one-loop Rayleigh--Schr\"odinger perturbation theory. We show that the results agree with the equal-time limit of the four-dimens
Externí odkaz:
http://arxiv.org/abs/1404.2797