# The Underlying Event in Hard Interactions at the Tevatron pbarp Collider

@inproceedings{Collaboration2004TheUE,
title={The Underlying Event in Hard Interactions at the Tevatron pbarp Collider},
author={Cdf II Collaboration},
year={2004}
}
For comparison of inclusive jet cross sections measured at hadron-hadron colliders to next-to-leading order (NLO) parton-level calculations, the energy deposited in the jet cone by spectator parton interactions must first be subtracted. The assumption made at the Tevatron is that the spectator parton interaction energy is similar to the ambient level measured in minimum bias events. In this paper, we test this assumption by measuring the ambient charged track momentum in events containing large… Expand
11 Citations
First measurement of the underlying event activity at the LHC with $\sqrt{s} = 0.9$ TeV
A measurement of the underlying activity in scattering processes with pT scale in the GeV region is performed in proton–proton collisions at $\sqrt{s} = 0.9$ TeV, using data collected by the CMSExpand
Study of double parton scattering using four-jet scenarios in proton-proton collisions at $\sqrt{s}$ = 7 TeV with the CMS experiment at the Large Hadron Collider
Measurements of the dierential cross sections for multijet scenarios in proton-proton collisions are presented as a function of the transverse momentum p T and pseudorapi- dity , together with theExpand
Measurement of the underlying event activity in pp collisions at $\sqrt {s} = 0.9$ and 7 TeV with the novel jet-area/median approach
A bstractThe first measurement of the charged component of the underlying event using the novel “jet-area/median” approach is presented for proton-proton collisions at centre-of-mass energies of 0.9Expand
Charged-particle multiplicities in pp interactions measured with the ATLAS detector at the LHC
Measurements are presented from proton–proton collisions at centre-of-mass energies of √ s = 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the LHC. Events were collected using a single-armExpand
Measurement of energy flow at large pseudorapidities in pp collisions at $\sqrt {s} = 0.{9}$ and 7 TeV
A bstractThe energy flow, dE/dη, is studied at large pseudorapidities in proton-proton collisions at the LHC, for centre-of-mass energies of 0.9 and 7 TeV. The measurements are made using the CMSExpand
Probing collective effects in hadronisation with the extremes of the underlying event
• Physics
• 2016
We define a new set of observables to probe the structure of the underlying event in hadron collisions. We use the conventional definition of the “transverse region” in jet events and, for a fixedExpand
Measurement of the underlying event in jet events from 7 $$\text {TeV}$$TeV proton–proton collisions with the ATLAS detector
Distributions sensitive to the underlying event in QCD jet events have been measured with the ATLAS detector at the LHC, based on $$37~\text {pb}^{-1}$$37pb-1 of proton–proton collision dataExpand
STUDYING TRANSVERSE MOMENTUM DEPENDENT DISTRIBUTIONS IN POLARIZED PROTON COLLISIONS VIA AZIMUTHAL SINGLE SPIN ASYMMETRIES OF CHARGED PIONS IN JETS
A complete, fundamental understanding of the proton must include knowledge of the underlying spin structure. The transversity distribution, $h_1\left(x\right)$, which describes the transverse spinExpand
The ATLAS Simulation Infrastructure
The simulation software for the ATLAS Experiment at the Large Hadron Collider is being used for large-scale production of events on the LHC Computing Grid. This simulation requires many components,Expand
Simulation of multiple partonic interactions in Herwig
• Physics
• 2008
In this paper we describe a model of multiple partonic interactions that has been implemented in Herwig++. Tuning its two free parameters we find a good description of CDF underlying event data. WeExpand