Regular Article - Theoretical Physics
Angular correlations in pA collisions from CGC: multiplicity and mean transverse momentum dependence of
National Centre for Nuclear Research, 02-093, Warsaw, Poland
2 Departamento de Física de Partículas and IGFAE, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Galicia, Spain
3 Physics Department, University of Connecticut, 2152 Hillside Road, 06269, Storrs, CT, USA
4 Physics Department, Ben-Gurion University of the Negev, 84105, Beer Sheva, Israel
5 North Carolina State University, 27695, Raleigh, NC, USA
6 RIKEN-BNL Research Center, Brookhaven National Laboratory, 11973, Upton, NY, USA
Accepted: 24 June 2021
Published online: 6 July 2021
Within the dense-dilute Color Glass Condensate approach, and using the Golec–Biernat–Wuesthoff model for the dipole scattering amplitude, we calculate as well as the correlations between and both the total multiplicity and the mean transverse momentum of produced particles. We find that the correlations are generally very small consistent with the observations. We note an interesting sharp change in the value of as well as of its correlations as a function of the width of the transverse momentum bin. This crossover is associated with the change from Bose enhancement dominance of the correlation for narrow bin to HBT dominated correlations for larger bin width.
© The Author(s) 2021
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