Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR

Kauder, K.

doi:10.1016/j.nuclphysa.2017.07.004

Title: Measurement of the Shared Momentum Fraction z_g using Jet Reconstruction in p + p and Au + Au Collisions with STAR

Abstract

One key difference in current energy loss models lies in the treatment of the Altarelli-Parisi, AP, splitting functions. It has been shown that the shared momentum fraction, henceforth called Jet Splitting Function z_g as determined by the SoftDrop grooming process can be made a Sudakov-safe measurement of the symmetrized AP functions in p+p collisions. The STAR collaboration presents the first z_g measurements at $$ \sqrt{s}$$NN = 200 GeV in p+p and Au+Au collisions, where in Au+Au we use a set of di-jets with hard cores reconstructed with a 2 GeV/c constituent cut. For a jet resolution parameter of R = 0.4, these di-jet pairs were found to be significantly imbalanced with respect to p+p, yet regained balance when all soft constituents were included. As a result, we find that within uncertainties there are no signs of a modified Jet Splitting Function on trigger or recoil sides of this di-jet selection.

Authors:

Kauder, K. ^[1]

Wayne State Univ., Detroit, MI (United States)

Publication Date:: Mon Sep 25 00:00:00 EDT 2017

Research Org.:: Wayne State Univ., Detroit, MI (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1502368

Grant/Contract Number:: FG02-92ER40713

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Physics. A

Additional Journal Information:: Journal Volume: 967; Journal Issue: C; Journal ID: ISSN 0375-9474

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Quark-gluon plasma; jets; SoftDrop; Shared Momentum Fraction

Citation Formats


                    Kauder, K. Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR.  United States: N. p., 2017. 
Web.  doi:10.1016/j.nuclphysa.2017.07.004.

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                    Kauder, K. Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR.  United States.  https://doi.org/10.1016/j.nuclphysa.2017.07.004

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                    Kauder, K. Mon .  
"Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR".  United States.  https://doi.org/10.1016/j.nuclphysa.2017.07.004.  https://www.osti.gov/servlets/purl/1502368.

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@article{osti_1502368,

  title        = {Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR},

  author       = {Kauder, K.},

  abstractNote = {One key difference in current energy loss models lies in the treatment of the Altarelli-Parisi, AP, splitting functions. It has been shown that the shared momentum fraction, henceforth called Jet Splitting Function zg as determined by the SoftDrop grooming process can be made a Sudakov-safe measurement of the symmetrized AP functions in p+p collisions. The STAR collaboration presents the first zg measurements at $ \sqrt{s}$NN = 200 GeV in p+p and Au+Au collisions, where in Au+Au we use a set of di-jets with hard cores reconstructed with a 2 GeV/c constituent cut. For a jet resolution parameter of R = 0.4, these di-jet pairs were found to be significantly imbalanced with respect to p+p, yet regained balance when all soft constituents were included. As a result, we find that within uncertainties there are no signs of a modified Jet Splitting Function on trigger or recoil sides of this di-jet selection.},

  doi          = {10.1016/j.nuclphysa.2017.07.004},

  journal      = {Nuclear Physics. A},

  number       = C,

  volume       = 967,

  place        = {United States},

  year         = {Mon Sep 25 00:00:00 EDT 2017},

  month        = {Mon Sep 25 00:00:00 EDT 2017}

}

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Journal Article:

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https://doi.org/10.1016/j.nuclphysa.2017.07.004

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Cited by: 12 works

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Figures / Tables:

Fig. 1. : Trigger jets for p+p HT compared to detector level PYTHIA predictions in one examplemore »

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Works referenced in this record:

Sudakov safety in perturbative QCD
journal, June 2015

Larkoski, Andrew J.; Marzani, Simone; Thaler, Jesse
Physical Review D, Vol. 91, Issue 11
DOI: 10.1103/PhysRevD.91.111501

FastJet user manual: (for version 3.0.2)
journal, March 2012

Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
The European Physical Journal C, Vol. 72, Issue 3
DOI: 10.1140/epjc/s10052-012-1896-2

The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC
journal, March 2003

Anderson, M.; Berkovitz, J.; Betts, W.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 2-3
DOI: 10.1016/S0168-9002(02)01964-2

The STAR Barrel Electromagnetic Calorimeter
journal, March 2003

Beddo, M.; Bielick, E.; Fornek, T.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 2-3
DOI: 10.1016/S0168-9002(02)01970-8

Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions
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Lai, H. L.; Huston, J.; Kuhlmann, S.
The European Physical Journal C, Vol. 12, Issue 3
DOI: 10.1007/s100529900196

A brief introduction to PYTHIA 8.1
journal, June 2008

Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
Computer Physics Communications, Vol. 178, Issue 11
DOI: 10.1016/j.cpc.2008.01.036

Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in $\vec{p} + \vec{p}$ Collisions at $\sqrt{s} = 200 GeV$
journal, June 2008

Abelev, B. I.; Aggarwal, M. M.; Ahammed, Z.
Physical Review Letters, Vol. 100, Issue 23
DOI: 10.1103/PhysRevLett.100.232003

Works referencing / citing this record:

Dynamical grooming of QCD jets
journal, February 2020

Mehtar-Tani, Yacine; Soto-Ontoso, Alba; Tywoniuk, Konrad
Physical Review D, Vol. 101, Issue 3
DOI: 10.1103/physrevd.101.034004

Novel subjet observables for jet quenching in heavy-ion collisions
journal, June 2018

Apolinário, Liliana; Milhano, José Guilherme; Ploskon, Mateusz
The European Physical Journal C, Vol. 78, Issue 6
DOI: 10.1140/epjc/s10052-018-5999-2

Dynamical grooming of QCD jets
text, January 2019

Mehtar-Tani, Yacine; Soto-Ontoso, Alba; Tywoniuk, Konrad
arXiv
DOI: 10.48550/arxiv.1911.00375

Identifying groomed jet splittings in heavy-ion collisions
text, January 2020

Mulligan, James; Ploskon, Mateusz
arXiv
DOI: 10.48550/arxiv.2006.01812

Figures / Tables found in this record:

Fig. 1. (p. 2)

Fig. 2. (p. 3)

Fig. 3. (p. 4)

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.

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Similar Records

Title: Measurement of the Shared Momentum Fraction zg using Jet Reconstruction in p + p and Au + Au Collisions with STAR

Abstract

Citation Formats

Figures / Tables:

Sudakov safety in perturbative QCD journal, June 2015

FastJet user manual: (for version 3.0.2) journal, March 2012

The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC journal, March 2003

The STAR Barrel Electromagnetic Calorimeter journal, March 2003

Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions journal, February 2000

A brief introduction to PYTHIA 8.1 journal, June 2008

Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in p → + p → Collisions at s = 200 GeV journal, June 2008

Dynamical grooming of QCD jets journal, February 2020

Novel subjet observables for jet quenching in heavy-ion collisions journal, June 2018

Dynamical grooming of QCD jets text, January 2019

Identifying groomed jet splittings in heavy-ion collisions text, January 2020

Title: Measurement of the Shared Momentum Fraction z_g using Jet Reconstruction in p + p and Au + Au Collisions with STAR

Sudakov safety in perturbative QCD
journal, June 2015

FastJet user manual: (for version 3.0.2)
journal, March 2012

The STAR time projection chamber: a unique tool for studying high multiplicity events at RHIC
journal, March 2003

The STAR Barrel Electromagnetic Calorimeter
journal, March 2003

Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions
journal, February 2000

A brief introduction to PYTHIA 8.1
journal, June 2008

Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in $\vec{p} + \vec{p}$ Collisions at $\sqrt{s} = 200 GeV$
journal, June 2008

Dynamical grooming of QCD jets
journal, February 2020

Novel subjet observables for jet quenching in heavy-ion collisions
journal, June 2018

Dynamical grooming of QCD jets
text, January 2019

Identifying groomed jet splittings in heavy-ion collisions
text, January 2020