Header

UZH-Logo

Maintenance Infos

Correlations between jets and charged particles in PbPb andppcollisionsat $\sqrt{^{s}NN}$ = 2.76TeV - Zurich Open Repository and Archive


CMS Collaboration; Canelli, F; Chiochia, V; Kilminster, B; Robmann, P; et al (2016). Correlations between jets and charged particles in PbPb andppcollisionsat $\sqrt{^{s}NN}$ = 2.76TeV. Journal of High Energy Physics, 1602:1-38.

Abstract

CThe quark-gluon plasma is studied via medium-induced changes to correlations between jets and charged particles in PbPb collisions compared to pp reference data. This analysis uses data sets from PbPb and pp collisions with integrated luminosi- ties of 166 μb$^{−1}$ and 5.3 pb$^{−1}$, respectively, collected at $\sqrt{^{s}NN}$ = 2.76 TeV. The angular distributions of charged particles are studied as a function of relative pseudorapidity (∆η) and relative azimuthal angle (∆φ) with respect to reconstructed jet directions. Charged particles are correlated with all jets with transverse momentum ($p_{T}$) above 120 GeV, and with the leading and subleading jets (the highest and second-highest in $p_{T}$, respectively) in a selection of back-to-back dijet events. Modifications in PbPb data relative to pp reference data are characterized as a function of PbPb collision centrality and charged particle $p_{T}$. A centrality-dependent excess of low-$p_{T}$ particles is present for all jets studied, and is most pronounced in the most central events. This excess of low-$p_{T}$ particles follows a Gaussian-like distribution around the jet axis, and extends to large relative angles of ∆η ≈ 1 and ∆φ ≈ 1.

Abstract

CThe quark-gluon plasma is studied via medium-induced changes to correlations between jets and charged particles in PbPb collisions compared to pp reference data. This analysis uses data sets from PbPb and pp collisions with integrated luminosi- ties of 166 μb$^{−1}$ and 5.3 pb$^{−1}$, respectively, collected at $\sqrt{^{s}NN}$ = 2.76 TeV. The angular distributions of charged particles are studied as a function of relative pseudorapidity (∆η) and relative azimuthal angle (∆φ) with respect to reconstructed jet directions. Charged particles are correlated with all jets with transverse momentum ($p_{T}$) above 120 GeV, and with the leading and subleading jets (the highest and second-highest in $p_{T}$, respectively) in a selection of back-to-back dijet events. Modifications in PbPb data relative to pp reference data are characterized as a function of PbPb collision centrality and charged particle $p_{T}$. A centrality-dependent excess of low-$p_{T}$ particles is present for all jets studied, and is most pronounced in the most central events. This excess of low-$p_{T}$ particles follows a Gaussian-like distribution around the jet axis, and extends to large relative angles of ∆η ≈ 1 and ∆φ ≈ 1.

Statistics

Citations

Altmetrics

Downloads

6 downloads since deposited on 10 Jan 2017
6 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2016
Deposited On:10 Jan 2017 10:30
Last Modified:10 Jan 2017 10:30
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP02(2016)156

Download

Preview Icon on Download
Preview
Content: Accepted Version
Filetype: PDF
Size: 1MB
View at publisher
Preview Icon on Download
Preview
Content: Published Version
Filetype: PDF
Size: 1MB
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations