Altas Energías
THE proton-proton collisions in all their splendor at high multiplicity
by Dr. Aditya Mishra (ICN-UNAM)
Wednesday, 26 February 2020
from
to
(Mexico/General)
at ICN-UNAM ( Salon de Seminarios de Gravitacion y Altas Energias, A225, 2o nivel, edificio A )
at ICN-UNAM ( Salon de Seminarios de Gravitacion y Altas Energias, A225, 2o nivel, edificio A )
Instituto de Ciencias Nucleares,
Universidad Nacional Autónoma de México,
Avenida Universidad No. 3000, Col. UNAM-C.U. Distrito Federal, C.P. 04510, México
Description |
We will review the recent work done in the investigation of pp collisions in ICN. We have opted to investigate the behavior of the basic parameters in function of multiplicity going to extremely high multiplicities not yet covered neither in experiments nor in simulations. we will present our study of the transverse momentum spectra at high multiplicity giving importance to the detail shapes of the spectra in what is usually called "the power law " tail which, as we will show, is not the case We treated PbPb data in a similar way and compare its power-law exponent with the pp ones to find out the similarities. The second part of the talk will deal with the possible observation of energy loss in pp collisions. This was done observing 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 (|η| < 0.8) using PYTHIA8 event generator. I show some results which indicate that the behavior of both the underlying and hard components are affected by the multiplicity of the events i.e. the energy density. The behavior of the spectra at very high multiplicities suggests that the partons suffer energy loss compensated by an increase in the multiplicity of events. The results tend to suggest a change of paradigm in our reasoning about the energy loss and reinforce the similarities of the pp collisions with PbPb ones as strange as this might look! |
Material: | |
Support | Email: alexis@nucleares.unam.mx |