arXiv subjects

C. N. Azevedo

Publications and source records attributed to C. N. Azevedo.

2 recordsLinked to original sources

arXiv2026

Effects of the magnetic field on $π^0$ production in ultraperipheral Pb-Pb collisions

In this work, we study the effect of the magnetic field on the production of neutral pions in photon-photon interactions in ultraperipheral Pb-Pb collisions at the LHC. The calculation is performed within the equivalent photon approximation, including a magnetic-field dependence in the decay width $Γ(π^0\toγγ)$, from which the corresponding production cross section is computed. We find that the reduction of the two-photon decay width in the presence of a strong magnetic field leads to a substantial reduction (by a factor of about 2-3) of the $π^0$ production cross section at LHC energies.

hep-ph↗

arXiv2024

Production of $η_b$ in ultra-peripheral $Pb Pb$ collisions

Very recently, the two-photon decay width of the $η_b$ meson was computed with lattice QCD methods. This decay has not yet been measured. The knowledge of this width allows for the calculation of the $η_b$ production cross section through photon-photon interactions in ultra-peripheral $PbPb$ collisions. In this work we present this calculation, which is the first application of the lattice result. Since UPCs are gaining an increasing attention of the heavy ion community, we take the opportunity to perform a comprehensive study of the different ways of defining ultra-peripheral collisions and of the different ways to treat the equivalent photon flux.

hep-ph↗