CGC for Ultra-Peripheral Pb+Pb Collisions at the Large Hadron Collider: a more realistic calculation
arXiv:2208.05000 · doi:10.1007/JHEP12(2022)077
Abstract
We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of the nearly real photon, we consider two diametrically different models: the dilute quark-antiquark dipole approximation and a vector meson, in which color charge density is approximated by McLerran-Venugopalan model. In the experimentally relevant range, the target nucleus can be faithfully approximated by a highly saturated state. This simplification enables us to perform efficient numerical simulations and extract the two-gluon correlation functions and the associated azimuthal harmonics.
35 pages,8 figures
References in corpus (9)
- The Physics of Ultraperipheral Collisions at the LHC
- Angular Correlations in Gluon Production at High Energy
- The smallest fluid on earth
- Two-particle azimuthal correlations in photonuclear ultraperipheral Pb+Pb collisions at 5.02 TeV with ATLAS
- DPS in CGC: Double Quark Production and Effects of Quantum Statistics
- Exploring the Collective Phenomenon at the Electron-Ion Collider
- Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of
- First saturation correction in high energy proton-nucleus collisions: Part III. Ensemble averaging
- Asymmetric longitudinal flow decorrelations in proton-nucleus collisions