Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions

Collectivity, as interpreted to mean flow of a dense medium in high-energy A-A collisions described by hydrodynamics, has been attributed to smaller collision systems – p-A and even p-p collisions – based on recent analysis of LHC data. However, alternative methods reveal that some data features att...

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Main Author: A. Trainor Thomas
Format: Article
Language:English
Published: EDP Sciences 2018-01-01
Series:EPJ Web of Conferences
Online Access:https://doi.org/10.1051/epjconf/201817205004
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author A. Trainor Thomas
author_facet A. Trainor Thomas
author_sort A. Trainor Thomas
collection DOAJ
description Collectivity, as interpreted to mean flow of a dense medium in high-energy A-A collisions described by hydrodynamics, has been attributed to smaller collision systems – p-A and even p-p collisions – based on recent analysis of LHC data. However, alternative methods reveal that some data features attributed to flows are actually manifestations of minimum-bias (MB) jets. In this presentation I review the differential structure of single-particle pt spectra from SPS to LHC energies in the context of a two-component (soft + hard) model (TCM) of hadron production. I relate the spectrum hard component to measured properties of isolated jets. I use the spectrum TCM to predict accurately the systematics of ensemble-mean p̅t in p-p, p-A and A-A collision systems over a large energy interval. Detailed comparisons of the TCM with spectrum and correlation data suggest that MB jets play a dominant role in hadron production near midrapidity. Claimed flow phenomena are better explained as jet manifestations agreeing quantitatively with measured jet properties.
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spelling doaj.art-6986785b7ecc44f2892b7dee2a5a451d2022-12-21T22:06:05ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011720500410.1051/epjconf/201817205004epjconf_ismd2018_05004Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisionsA. Trainor ThomasCollectivity, as interpreted to mean flow of a dense medium in high-energy A-A collisions described by hydrodynamics, has been attributed to smaller collision systems – p-A and even p-p collisions – based on recent analysis of LHC data. However, alternative methods reveal that some data features attributed to flows are actually manifestations of minimum-bias (MB) jets. In this presentation I review the differential structure of single-particle pt spectra from SPS to LHC energies in the context of a two-component (soft + hard) model (TCM) of hadron production. I relate the spectrum hard component to measured properties of isolated jets. I use the spectrum TCM to predict accurately the systematics of ensemble-mean p̅t in p-p, p-A and A-A collision systems over a large energy interval. Detailed comparisons of the TCM with spectrum and correlation data suggest that MB jets play a dominant role in hadron production near midrapidity. Claimed flow phenomena are better explained as jet manifestations agreeing quantitatively with measured jet properties.https://doi.org/10.1051/epjconf/201817205004
spellingShingle A. Trainor Thomas
Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
EPJ Web of Conferences
title Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
title_full Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
title_fullStr Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
title_full_unstemmed Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
title_short Collectivity and manifestations of minimum-bias jets in high-energy nuclear collisions
title_sort collectivity and manifestations of minimum bias jets in high energy nuclear collisions
url https://doi.org/10.1051/epjconf/201817205004
work_keys_str_mv AT atrainorthomas collectivityandmanifestationsofminimumbiasjetsinhighenergynuclearcollisions