# 11th International Workshop on Multiple Partonic Interactions at the LHC

18-22 November 2019
Europe/Zurich timezone

## Diffractive excitation in pp and pA scattering at high energies

19 Nov 2019, 15:55
25m
MPI & Small-x & diffraction

### Speaker

Dr P.V.R.G. Silva (Universidade Federal de Pelotas)

### Description

We present an update of the Miettinen-Pumplim (MP) model for diffractive excitation for proton-proton ($pp$) and antiproton-proton ($\bar{p}p$) scattering considering recent LHC data. The energy dependence of the total, elastic, and diffractive cross sections are analyzed and compared to data. The implications of the diffractive excitation in proton-nucleus ($pA$) collisions are also discussed for different nuclei. We used the MP model to derive the main quantities present in the treatment of the diffractive excitation in $pA$ collisions. We demonstrate that the effect of fluctuations decreases at larger energies and heavier nuclei. We also compare our results with the predictions for the proton dissociation induced by photon interactions.

### Primary authors

Prof. V.P. Gonçalves (Universidade Federal de Pelotas) Mr R. Palota da Silva (Universidade Federal de Pelotas) Dr P.V.R.G. Silva (Universidade Federal de Pelotas)