J. C. Lopez | Searcharxiv

arXiv2022

One flavour adjoint QCD with overlap fermions

The infrared effective theory of adjoint QCD with one Dirac flavour is still under debate. The theory could be confining, conformal, or with a massless fermion in the infrared. The study of chiral symmetry seems to be important to answer this question. While previous investigations have considered Wilson fermions, we present here the first results for this theory based on overlap fermions to avoid explicit chiral symmetry breaking. These indicate spontaneous chiral symmetry breaking by the formation of a fermion condensate. We have also investigated the running coupling of the theory, which indicates no infrared conformality in the energy region we have explored.

hep-lat↗

arXiv1997

H2+ ion in strong magnetic field: a variational study

Using a single trial function we perform an accurate calculation of the ground state $1σ_g$ of the hydrogenic molecular ion $H^+_2$ in a constant uniform magnetic field ranging $0-10^{13}$ G. We show that this trial function also makes it possible to study the negative parity ground state $1σ_u$. We obtain that over the whole range of magnetic fields studied, the calculated binding energies are in most cases larger than binding energies obtained previously by other authors using different methods.

astro-ph↗