Quantifying the underlying event: investigating angular dependence of multiplicity classes and transverse-momentum spectra in high-energy pp collisions at LHC energies

Abstract

Abstract We present a study of the transverse momentum spectra of charged hadrons and their evolution as a function of their azimuthal position with respect to the leading particle in proton–proton collisions at s = 13 TeV using the PYTHIA8 Monte Carlo event generator with the Monash 2013 tune. The spherocity distribution in the same azimuthal bins is reported. The Multiplicity and midrapidity transverse momentum spectra of charged hadrons have been analysed in the non-extensive statistical framework. The results corresponding to the Underlying Event are reported. This work provides a possible understanding of the interplay between hard scatterings and the Underlying Event in proton–proton collisions.