Studies of the underlying-event properties and of hard double parton scattering with the ATLAS detector

Oleg Kuprash*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


A correct modelling of the underlying event in proton-proton collisions at Large Hadron Collider is important for the proper simulation of kinematic distributions of final state objects. The ATLAS collaboration performed a study at 13 TeV, measuring the number and transverse-momentum sum of charged particles in different regions with respect to the direction of the reconstructed leading track. These measurements are sensitive to the underlying-event activity. The results are compared to predictions of several Monte Carlo generators. Inclusive four-jet events produced in proton-proton collisions at a centre-of-mass energy of 7 TeV in the ATLAS detector have been analysed for the presence of hard double parton scattering. The fraction of events originating from hard double parton scattering has been extracted, and used to measure the effective proton cross section. Distributions sensitive to the presence of double parton scattering were unfolded to the parton level and compared to various tunes of a selected Monte Carlo simulation.

Original languageEnglish
Article number035
JournalProceedings of Science
StatePublished - 2017
Event25th International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2017 - Birmingham, United Kingdom
Duration: 3 Apr 20177 Apr 2017


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