Collectivity without plasma in hadronic collisions

Christian Bierlich; Gösta Gustafson; Leif Lönnblad

doi:10.1016/j.physletb.2018.01.069

Collectivity without plasma in hadronic collisions

Christian Bierlich, Gösta Gustafson, Leif Lönnblad

Research output: Contribution to journal › Article › peer-review

Abstract

We present a microscopic model for collective effects in high multiplicity proton–proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. From lattice calculations we know that QCD strings are transversely extended, and we argue that this should result in a transverse pressure and expansion, similar to the flow in a deconfined plasma. The model is implemented in the PYTHIA8 Monte Carlo event generator, and we find that it can qualitatively reproduce the long range azimuthal correlations forming a near-side ridge in high multiplicity proton–proton events at LHC energies.

Original language	English
Pages (from-to)	58-63
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	779
DOIs	https://doi.org/10.1016/j.physletb.2018.01.069
Publication status	Published - 2018 Apr 10

Subject classification (UKÄ)

Subatomic Physics

Free keywords

Collectivity
Confinement
Hadronisation
Monte Carlo generators
Quark–gluon plasma

Access to Document

10.1016/j.physletb.2018.01.069

Innovative Network for Monte Carlo Event Generators for LHC Physics
Lönnblad, L. (Researcher), Sjostrand, T. (Researcher), Bierlich, C. (Researcher), Rasmussen, C. (Researcher), Sjödahl, M. (Researcher), Bellm, J. (Researcher), Chakraborty, S. (Researcher), Gellersen, L. (Researcher), Lifson, A. (Researcher), Plumberg, C. (Researcher), Prestel, S. (Researcher), Reuschle, C. (Researcher), Shah, H. R. (Researcher), Törnkvist, R. (Researcher), Utheim, M. (Researcher) & Zapp, K. (Researcher)
2017/04/01 → 2021/03/31
Project: Network
QCD Phenomenology and Event Generator Development
Lönnblad, L. (Researcher) & Gustafson, G. (Researcher)
2017/01/01 → 2020/12/31
Project: Commissioned research

Cite this

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title = "Collectivity without plasma in hadronic collisions",

abstract = "We present a microscopic model for collective effects in high multiplicity proton–proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. From lattice calculations we know that QCD strings are transversely extended, and we argue that this should result in a transverse pressure and expansion, similar to the flow in a deconfined plasma. The model is implemented in the PYTHIA8 Monte Carlo event generator, and we find that it can qualitatively reproduce the long range azimuthal correlations forming a near-side ridge in high multiplicity proton–proton events at LHC energies.",

keywords = "Collectivity, Confinement, Hadronisation, Monte Carlo generators, Quark–gluon plasma",

author = "Christian Bierlich and G{\"o}sta Gustafson and Leif L{\"o}nnblad",

year = "2018",

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doi = "10.1016/j.physletb.2018.01.069",

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T1 - Collectivity without plasma in hadronic collisions

AU - Bierlich, Christian

AU - Gustafson, Gösta

AU - Lönnblad, Leif

PY - 2018/4/10

Y1 - 2018/4/10

N2 - We present a microscopic model for collective effects in high multiplicity proton–proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. From lattice calculations we know that QCD strings are transversely extended, and we argue that this should result in a transverse pressure and expansion, similar to the flow in a deconfined plasma. The model is implemented in the PYTHIA8 Monte Carlo event generator, and we find that it can qualitatively reproduce the long range azimuthal correlations forming a near-side ridge in high multiplicity proton–proton events at LHC energies.

AB - We present a microscopic model for collective effects in high multiplicity proton–proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. From lattice calculations we know that QCD strings are transversely extended, and we argue that this should result in a transverse pressure and expansion, similar to the flow in a deconfined plasma. The model is implemented in the PYTHIA8 Monte Carlo event generator, and we find that it can qualitatively reproduce the long range azimuthal correlations forming a near-side ridge in high multiplicity proton–proton events at LHC energies.

KW - Collectivity

KW - Confinement

KW - Hadronisation

KW - Monte Carlo generators

KW - Quark–gluon plasma

U2 - 10.1016/j.physletb.2018.01.069

DO - 10.1016/j.physletb.2018.01.069

M3 - Article

AN - SCOPUS:85044669235

SN - 0370-2693

VL - 779

SP - 58

EP - 63

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Collectivity without plasma in hadronic collisions

Abstract

Subject classification (UKÄ)

Free keywords

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Projects

Innovative Network for Monte Carlo Event Generators for LHC Physics

QCD Phenomenology and Event Generator Development

Cite this