Parton energy loss in pp collisions at very high multiplicity

Understand

We present the results for the evolution of transverse momentum spectra for the jetty and underlying parts of events as a function of multiplicity in pp collisions at 13 TeV measured at midrapidity ($\left|\eta\right|<0.8$) using PYTHIA8 event generator.

• The main characteristic of the approach is that it reaches to extreme multiplicities not yet explored by the experiments.
• We demonstrate that the behavior of both the underlying and hard components are affected by the multiplicity of the events i.e.
• the energy density.