Conveners
Underlying Event
- Andrzej Konrad Siodmok (CERN)
Underlying Event
- Anastasia Grebenyuk (Universite Libre de Bruxelles (BE))
Underlying Event
- Deepak Kar (University of Glasgow (GB))
- Deepak Kar (IKTP, TU Dresden)
Jesper Roy Christiansen
(L)
03/11/2014, 09:50
Underlying event
In this talk I will present a new model for the treatment of colours within the non-perturbative part of the Pythia event generation. This includes both a new treatment of colours in the beam remnant as well as a new model for colour reconnections. The aim of the model has been to include more of the SU(3) colour structure of QCD. The model has been implemented in Pythia 8, and comparisons to...
Korinna Christine Zapp
(CERN), Dr
Korinna Christine Zapp
(Institute for Particle Physics Phenomenology, Durham University),
Korinna Christine Zapp,
Korinna Zapp
(Durham University),
Korinna Zapp
(University of Heidelberg)
03/11/2014, 10:10
Underlying event
MPI in Sherpa
Dr
Tanguy Pierog
(KIT)
03/11/2014, 10:35
Underlying event
Underlying event studies are very important for the reconstruction of all jets based high energy physics measurements. For Monte Carlo generator it is a very difficult test since it is probing the soft QCD physics in correlation with hard scale events. As a consequence it is challenging for both HEP type models like PYTHIA which are optimized to reproduce mainly hard scale processes and for...
Miroslav Myska
(Czech Technical University (CZ))
03/11/2014, 11:45
Underlying event
Talk
Improving the forward rapidity gap description in Herwig++
Wei Yang Wang
(National University of Singapore (SG))
03/11/2014, 12:05
Underlying event
Talk
A measurement of the underlying event activity is performed in proton-proton collisions at sqrt(s)=2.76 GeV, using data collected by the CMS experiment at the LHC. The average multiplicity and scalar-pT sum densities of charged particles in the azimuthal region transverse to the leading charged particle jet at central pseudorapidities are studied. A steep rise of the underlying event activity...
Stefano Camarda
(Deutsches Elektronen-Synchrotron (DE))
03/11/2014, 12:30
Underlying event
Studies of the underlying event and event shapes with ATLAS
Particle distributions sensitive to the underlying event and multi-parton interactions in proton-proton collisions have been measured with the ATLAS detector at the LHC at 7 TeV centre-of-mass energy. Various complementary measurements are presented, e.g. charged particle multiplicity, charged and inclusive sum transverse momentum...
Mark Strikman
03/11/2014, 14:30
Underlying event
Experimental findings of CMS on properties of jets and underlying events at high multiplicities in proton-proton interactions at 7 TeV are interpreted as an indication of increasing role of central collisions with small impact parameters. We find an indication that the rates of different hard processes observed by CMS and ALICE universally depend on underlying event charged-particles...
Gaku Mitsuka
(Universita e INFN (IT))
03/11/2014, 14:55
Underlying event
The LHC forward (LHCf) experiment has measured neutral particles production in proton-proton and proton-lead collisions at the LHC. The main purposes of the LHCf experiment are first to measure the hadronic production cross sections of neutral particles emitted in very forward angles (pseudo-rapidity > 8.4), and then to test hadronic interaction models widely used in various cosmic-ray...
16.
Measurements of event shapes, particle production and their correlations with the ATLAS detector
Robert Astalos
(Comenius University (SK))
03/11/2014, 15:20
Underlying event
The evolution of the event shape variables, such as the transverse thrust, thrust minor and transverse sphericity have been studied for minimum bias events as a function of momentum scale. In addition the high-energy pp collisions at the LHC provide unique opportunity to study particle flow and event shapes of the hadronic final state particles.
The measurements of production properties of...
Richard D. Field,
Richard Dryden Field
(University of Florida (US))
03/11/2014, 15:40
Underlying event
Talk
We will report on recent development on underlying events and minimum bias MC tunes
Andy Buckley
(University of Glasgow (GB))
03/11/2014, 16:00
Underlying event
We present the 2014 ATLAS tunes of Pythia 8, which use the most recent and complete LHC dataset, along with data from the Tevatron and LEP. Separate new tunes are made to soft inelastic collisions, and to distributions that are sensitive to shower and underlying event models. The effect of varying both leading and next-to-leading order parton distribution functions is also considered, and...
