Interpreting single jet measurements in Pb$+$Pb collisions at the LHC

Spousta, Martin; Cole, Brian

doi:10.1140/epjc/s10052-016-3896-0

Title: Interpreting single jet measurements in Pb$$+$$Pb collisions at the LHC

Abstract

Results are presented from a phenomenological analysis of recent measurements of jet suppression and modifications of jet fragmentation functions in Pb+Pb collisions at the LHC. Particular emphasis is placed on the impact of the differences between quark and gluon jet quenching on the transverse momentum (p^jet_T) dependence of the jet R_AA and on the fragmentation functions, D(z). Primordial quark and gluon parton distributions were obtained from PYTHIA8 and were parameterized using simple power-law functions and extensions to the power-law function which were found to better describe the PYTHIA8 parton spectra. A simple model for the quark energy loss based on the shift formalism is used to model R_AA and D(z) using both analytic results and using direct Monte-Carlo sampling of the PYTHIA parton spectra. The model is capable of describing the full p^jet_T, rapidity, and centrality dependence of the measured jet R_AA using three effective parameters. A key result from the analysis is that the D(z) modifications observed in the data, excluding the enhancement at low-z, may result primarily from the different quenching of the quarks and gluons. Furthermore, the model is also capable of reproducing the charged hadron R_AA at high transverse momentum. Predictions are made for the jetmore »« less

Authors:

^[1]; Cole, Brian ^[2]

Charles Univ., Prague (Czech Republic)
Columbia Univ., New York, NY (United States)

Publication Date:: Wed Jan 27 00:00:00 EST 2016

Research Org.:: Columbia Univ., New York, NY (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1361701

Grant/Contract Number:: FG02-86ER40281

Resource Type:: Accepted Manuscript

Journal Name:: European Physical Journal. C, Particles and Fields

Additional Journal Information:: Journal Volume: 76; Journal Issue: 2; Journal ID: ISSN 1434-6044

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Spousta, Martin, and Cole, Brian. Interpreting single jet measurements in Pb$+$Pb collisions at the LHC.  United States: N. p., 2016. 
Web.  doi:10.1140/epjc/s10052-016-3896-0.

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                    Spousta, Martin, & Cole, Brian. Interpreting single jet measurements in Pb$+$Pb collisions at the LHC.  United States.  https://doi.org/10.1140/epjc/s10052-016-3896-0

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                    Spousta, Martin, and Cole, Brian. Wed .  
"Interpreting single jet measurements in Pb$+$Pb collisions at the LHC".  United States.  https://doi.org/10.1140/epjc/s10052-016-3896-0.  https://www.osti.gov/servlets/purl/1361701.

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@article{osti_1361701,

  title        = {Interpreting single jet measurements in Pb$+$Pb collisions at the LHC},

  author       = {Spousta, Martin and Cole, Brian},

  abstractNote = {Results are presented from a phenomenological analysis of recent measurements of jet suppression and modifications of jet fragmentation functions in Pb+Pb collisions at the LHC. Particular emphasis is placed on the impact of the differences between quark and gluon jet quenching on the transverse momentum (pjetT) dependence of the jet RAA and on the fragmentation functions, D(z). Primordial quark and gluon parton distributions were obtained from PYTHIA8 and were parameterized using simple power-law functions and extensions to the power-law function which were found to better describe the PYTHIA8 parton spectra. A simple model for the quark energy loss based on the shift formalism is used to model RAA and D(z) using both analytic results and using direct Monte-Carlo sampling of the PYTHIA parton spectra. The model is capable of describing the full pjetT, rapidity, and centrality dependence of the measured jet RAA using three effective parameters. A key result from the analysis is that the D(z) modifications observed in the data, excluding the enhancement at low-z, may result primarily from the different quenching of the quarks and gluons. Furthermore, the model is also capable of reproducing the charged hadron RAA at high transverse momentum. Predictions are made for the jet RAA at large rapidities where it has not yet been measured and for the rapidity dependence of D(z).},

  doi          = {10.1140/epjc/s10052-016-3896-0},

  journal      = {European Physical Journal. C, Particles and Fields},

  number       = 2,

  volume       = 76,

  place        = {United States},

  year         = {Wed Jan 27 00:00:00 EST 2016},

  month        = {Wed Jan 27 00:00:00 EST 2016}

}

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Title: Interpreting single jet measurements in Pb$$+$$Pb collisions at the LHC

Abstract

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Jet quenching in thin quark–gluon plasmas I: formalism journal, April 2000

Jet quenching at intermediate RHIC energies journal, January 2005

Measurement of the underlying event in jet events from 7 $$\text {TeV}$$ TeV proton–proton collisions with the ATLAS detector journal, August 2014

New parton distributions for collider physics journal, October 2010

The anti- k t jet clustering algorithm journal, April 2008

Global analysis of fragmentation functions for pions and kaons and their uncertainties journal, June 2007

Quenching of hadron spectra in media journal, September 2001

Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration journal, August 2005

Medium-induced gluon branching journal, January 2013

Probabilistic picture for medium-induced jet evolution journal, June 2014

Angular distribution of medium-induced QCD cascades journal, August 2015

Jet quenching within a hybrid strong/weak coupling approach journal, November 2014

A Farey tale for 𝒩 = 4 dyons journal, September 2009

Sonic Booms and Diffusion Wakes Generated by a Heavy Quark in Thermal Gauge-String Duality journal, January 2008

Medium modification of the shape of small-radius jets in central Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV journal, October 2018

Measurement of angular and momentum distributions of charged particles within and around jets in Pb + Pb and p p collisions at s N N = 5.02 TeV with the ATLAS detector journal, December 2019

Measurement of jet fragmentation in Pb+Pb and p p collisions at s N N = 5.02 TeV with the ATLAS detector journal, August 2018

Subtracted cumulants: Mitigating large background in jet substructure journal, October 2019

Factorization of Jet Cross Sections in Heavy-Ion Collisions journal, June 2019

Bayesian Extraction of Jet Energy Loss Distributions in Heavy-Ion Collisions journal, June 2019

Comparison of Fragmentation Functions for Jets Dominated by Light Quarks and Gluons from p p and Pb + Pb Collisions in ATLAS journal, July 2019

Measurement of jet fragmentation in Pb+Pb and pp collisions at $$\sqrt{{s_\mathrm{NN}}} = 2.76$$ s NN = 2.76 TeV with the ATLAS detector at the LHC journal, June 2017

Comparison of Fragmentation Functions for Jets Dominated by Light Quarks and Gluons from $pp$ and Pb+Pb Collisions in ATLAS text, January 2019

Measurement of jet fragmentation in Pb+Pb and pp collisions at √sNN = 5.02 TeV with the ATLAS detector text, January 2018

Factorization of Jet Cross Sections in Heavy-Ion Collisions text, January 2019

Deep learning jet modifications in heavy-ion collisions journal, March 2021

Medium-induced cascade in expanding media journal, July 2020

Jet suppression and jet substructure in Pb+Pb and Xe+Xe collisions with the ATLAS detector journal, February 2019

Flavor aspects of parton energy loss journal, August 2017

On similarity of jet quenching and charmonia suppression text, January 2016

High $p_{\rm T}$ spectra and anisotropy of light and heavy hadrons preprint, January 2017

Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ TeV with the ATLAS detector text, January 2017

The Role of QCD Monopoles in Jet Quenching text, January 2017

Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV with the ATLAS detector text, January 2018

Measurement of the nuclear modification factor for inclusive jets in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV with the ATLAS detector text, January 2018

Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS text, January 2019

Measurement of jet radial profiles in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV text, January 2019

Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with the ATLAS detector text, January 2019

Jet evolution in a dense QCD medium preprint, January 2020

Quenching effects in the cumulative jet spectrum text, January 2021

Comparison of jet quenching formalisms for a quark-gluon plasma “brick”
journal, December 2012

Jet Physics in Heavy-Ion Collisions
journal, April 2013

Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at $\sqrt{s_{NN}} = 2.76 TeV$ with the ATLAS Detector at the LHC
journal, December 2010

Transverse-Momentum and Collision-Energy Dependence of High- $p_{T}$ Hadron Suppression in $A u + A u$ Collisions at Ultrarelativistic Energies
journal, October 2003

Suppression Pattern of Neutral Pions at High Transverse Momentum in $Au + Au$ Collisions at $\sqrt{s_{N N}} = 200 GeV$ and Constraints on Medium Transport Coefficients
journal, December 2008

High- p_{T} charged hadron suppression in Au+Au collisions at sqrt[s_{NN}]=200GeV
journal, March 2004

Study of high-p T charged particle suppression in PbPb compared to pp collisions at $\sqrt{s_{\mathrm{NN}}}=2.76~\mathrm{TeV}$
journal, March 2012

Extracting the jet transport coefficient from jet quenching in high-energy heavy-ion collisions
journal, July 2014

Measurements of the Nuclear Modification Factor for Jets in $Pb + Pb$ Collisions at $\sqrt{s_{NN}} = 2.76 TeV$ with the ATLAS Detector
journal, February 2015

Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76 TeV$ with the ATLAS detector
journal, December 2014

Measurement of jet fragmentation in PbPb and $p p$ collisions at $\sqrt{s_{NN}} = 2.76$ TeV
journal, August 2014

An introduction to PYTHIA 8.2
journal, June 2015

Observation and studies of jet quenching in PbPb collisions at $\sqrt{s_{N N}} = 2.76$ TeV
journal, August 2011

Medium-Induced QCD Cascade: Democratic Branching and Wave Turbulence
journal, July 2013

New picture of jet quenching dictated by color coherence
journal, October 2013

A hybrid strong/weak coupling approach to jet quenching
journal, October 2014

Jet quenching in thin quark–gluon plasmas I: formalism
journal, April 2000

Jet quenching at intermediate RHIC energies
journal, January 2005

Measurement of the underlying event in jet events from 7 $$\text {TeV}$$ TeV proton–proton collisions with the ATLAS detector
journal, August 2014

New parton distributions for collider physics
journal, October 2010

The anti- k _t jet clustering algorithm
journal, April 2008

Global analysis of fragmentation functions for pions and kaons and their uncertainties
journal, June 2007

Quenching of hadron spectra in media
journal, September 2001

Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration
journal, August 2005

Medium-induced gluon branching
journal, January 2013

Probabilistic picture for medium-induced jet evolution
journal, June 2014

Angular distribution of medium-induced QCD cascades
journal, August 2015

Jet quenching within a hybrid strong/weak coupling approach
journal, November 2014

A Farey tale for 𝒩 = 4 dyons
journal, September 2009

Sonic Booms and Diffusion Wakes Generated by a Heavy Quark in Thermal Gauge-String Duality
journal, January 2008

Medium modification of the shape of small-radius jets in central Pb-Pb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{NN}}}=2.76 $$ TeV
journal, October 2018

Measurement of angular and momentum distributions of charged particles within and around jets in $Pb + Pb$ and $p p$ collisions at $\sqrt{s_{N N}} = 5.02$ TeV with the ATLAS detector
journal, December 2019

Measurement of jet fragmentation in Pb+Pb and $p p$ collisions at $\sqrt{s_{N N}} = 5.02$ TeV with the ATLAS detector
journal, August 2018

Subtracted cumulants: Mitigating large background in jet substructure
journal, October 2019

Factorization of Jet Cross Sections in Heavy-Ion Collisions
journal, June 2019

Bayesian Extraction of Jet Energy Loss Distributions in Heavy-Ion Collisions
journal, June 2019

Comparison of Fragmentation Functions for Jets Dominated by Light Quarks and Gluons from $p p$ and $Pb + Pb$ Collisions in ATLAS
journal, July 2019

Measurement of jet fragmentation in Pb+Pb and pp collisions at $$\sqrt{{s_\mathrm{NN}}} = 2.76$$ s NN = 2.76 TeV with the ATLAS detector at the LHC
journal, June 2017

Comparison of Fragmentation Functions for Jets Dominated by Light Quarks and Gluons from $pp$ and Pb+Pb Collisions in ATLAS
text, January 2019

Measurement of jet fragmentation in Pb+Pb and pp collisions at √sNN = 5.02 TeV with the ATLAS detector
text, January 2018

Factorization of Jet Cross Sections in Heavy-Ion Collisions
text, January 2019

Deep learning jet modifications in heavy-ion collisions
journal, March 2021

Medium-induced cascade in expanding media
journal, July 2020

Jet suppression and jet substructure in Pb+Pb and Xe+Xe collisions with the ATLAS detector
journal, February 2019

Flavor aspects of parton energy loss
journal, August 2017

On similarity of jet quenching and charmonia suppression
text, January 2016

High $p_{\rm T}$ spectra and anisotropy of light and heavy hadrons
preprint, January 2017

Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ TeV with the ATLAS detector
text, January 2017

The Role of QCD Monopoles in Jet Quenching
text, January 2017

Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV with the ATLAS detector
text, January 2018

Measurement of the nuclear modification factor for inclusive jets in Pb+Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02$ TeV with the ATLAS detector
text, January 2018

Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS
text, January 2019

Measurement of jet radial profiles in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV
text, January 2019

Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with the ATLAS detector
text, January 2019

Jet evolution in a dense QCD medium
preprint, January 2020

Quenching effects in the cumulative jet spectrum
text, January 2021