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Getting into the Swing of things in Heavy Ion Collisions
<!--HTML-->In proton-proton collisions the underlying event is rather well reproduced by general purpose event generators such as Herwig, Pythia and Sherpa. The key to this success has been the modelling of multi-parton interactions (MPI). Since long it has been recognised that the (semi-) sof...
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Lenguaje: | eng |
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2020
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Acceso en línea: | http://cds.cern.ch/record/2722003 |
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author | Lönnblad, Leif |
author_facet | Lönnblad, Leif |
author_sort | Lönnblad, Leif |
collection | CERN |
description | <!--HTML-->In proton-proton collisions the underlying event is rather well
reproduced by general purpose event generators such as Herwig, Pythia
and Sherpa. The key to this success has been the modelling of
multi-parton interactions (MPI). Since long it has been recognised
that the (semi-) soft partonic sub-scatterings in such a scenario
cannot be treated completely independent and the concept of "colour
reconnections" was introduced, where the hadronising strings in an
event may be spanning partons from several different sub scatterings.
The Anganty model for generating fully hadronic exclusive final states
in heavy ion collisions in Pythia8 originally did not include any
collective effects. Rather it simply stacked a number nucleon-nucleon
collisions from Pythia on top of each other, without allowing any
crosstalk. Nevertheless Angantyr is able to reproduce fairly well
general features of events in pA and AA, such as multiplicity and
transverse momentum distributions of charged particles.
In this talk I will present the so-called Swing model for colour
reconnectsions, which originally was developed for the Ariadne/DIPSY
program. Contrary to the standard reconnection models (eg. the ones
implemented for pp in Pythia), the swing is applied already on the
perturbative level and will also affect jet evolution. This model is
now being implemented in the Pythia8/Angantyr program where it allows
for colour reconnections between partons from different
nucleon-nucleon sub-collisions in pA and AA. This requires a proper
treatment of the space-time structure of heavy ion collisions in
general, and in particular of the jet evolution in such events. I will
present preliminary preliminary results from this model with emphasis
on jet-related observables. |
id | cern-2722003 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27220032022-11-02T22:22:10Zhttp://cds.cern.ch/record/2722003engLönnblad, LeifGetting into the Swing of things in Heavy Ion Collisions10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear CollisionsConferences<!--HTML-->In proton-proton collisions the underlying event is rather well reproduced by general purpose event generators such as Herwig, Pythia and Sherpa. The key to this success has been the modelling of multi-parton interactions (MPI). Since long it has been recognised that the (semi-) soft partonic sub-scatterings in such a scenario cannot be treated completely independent and the concept of "colour reconnections" was introduced, where the hadronising strings in an event may be spanning partons from several different sub scatterings. The Anganty model for generating fully hadronic exclusive final states in heavy ion collisions in Pythia8 originally did not include any collective effects. Rather it simply stacked a number nucleon-nucleon collisions from Pythia on top of each other, without allowing any crosstalk. Nevertheless Angantyr is able to reproduce fairly well general features of events in pA and AA, such as multiplicity and transverse momentum distributions of charged particles. In this talk I will present the so-called Swing model for colour reconnectsions, which originally was developed for the Ariadne/DIPSY program. Contrary to the standard reconnection models (eg. the ones implemented for pp in Pythia), the swing is applied already on the perturbative level and will also affect jet evolution. This model is now being implemented in the Pythia8/Angantyr program where it allows for colour reconnections between partons from different nucleon-nucleon sub-collisions in pA and AA. This requires a proper treatment of the space-time structure of heavy ion collisions in general, and in particular of the jet evolution in such events. I will present preliminary preliminary results from this model with emphasis on jet-related observables.oai:cds.cern.ch:27220032020 |
spellingShingle | Conferences Lönnblad, Leif Getting into the Swing of things in Heavy Ion Collisions |
title | Getting into the Swing of things in Heavy Ion Collisions |
title_full | Getting into the Swing of things in Heavy Ion Collisions |
title_fullStr | Getting into the Swing of things in Heavy Ion Collisions |
title_full_unstemmed | Getting into the Swing of things in Heavy Ion Collisions |
title_short | Getting into the Swing of things in Heavy Ion Collisions |
title_sort | getting into the swing of things in heavy ion collisions |
topic | Conferences |
url | http://cds.cern.ch/record/2722003 |
work_keys_str_mv | AT lonnbladleif gettingintotheswingofthingsinheavyioncollisions AT lonnbladleif 10thinternationalconferenceonhardandelectromagneticprobesofhighenergynuclearcollisions |