Direct observation of dijets in central Au+Au collisions with STAR

STAR Collaboration

doi:10.1016/j.nuclphysa.2006.06.090

Direct observation of dijets in central Au+Au collisions with STAR

STAR Collaboration

Physics and Astronomy

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

14 Citations (Scopus)

Abstract

We present first results of azimuthal (Δϕ) correlations of high transverse momentum (pT) hadrons from the high-statistics Au+Au dataset collected at RHIC in 2004. Previous correlations measurements observed the disappearance of back-to-back (Δϕ∼π) correlations in central Au+Au collisions, supporting the emerging picture of parton energy loss in dense QCD matter. In the present analysis, increasing the pT thresholds reveals a narrow back-to-back dijet peak which emerges above the decreasing combinatoric background. We study the possible medium modification of the dijet fragmentation function and compare to models, to place constraints on the nature and magnitude of in-medium energy loss.

Original language	English
Pages (from-to)	573-576
Number of pages	4
Journal	Nuclear Physics A
Volume	774
DOIs	https://doi.org/10.1016/j.nuclphysa.2006.06.090
Publication status	Published - 7 Aug 2006
Event	Quark Matter 2005: International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, 18th - Budapest, Hungary Duration: 4 Aug 2005 → 9 Aug 2005

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10.1016/j.nuclphysa.2006.06.090

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@article{dba2eecbf0d047548f14c3d36d15781b,

title = "Direct observation of dijets in central Au+Au collisions with STAR",

abstract = "We present first results of azimuthal (Δϕ) correlations of high transverse momentum (pT) hadrons from the high-statistics Au+Au dataset collected at RHIC in 2004. Previous correlations measurements observed the disappearance of back-to-back (Δϕ∼π) correlations in central Au+Au collisions, supporting the emerging picture of parton energy loss in dense QCD matter. In the present analysis, increasing the pT thresholds reveals a narrow back-to-back dijet peak which emerges above the decreasing combinatoric background. We study the possible medium modification of the dijet fragmentation function and compare to models, to place constraints on the nature and magnitude of in-medium energy loss.",

author = "D Magestro and John Adams and Lee Barnby and Leon Gaillard and Peter Jones and John Nelson and Anthony Timmins and {STAR Collaboration}",

year = "2006",

month = aug,

day = "7",

doi = "10.1016/j.nuclphysa.2006.06.090",

language = "English",

volume = "774",

pages = "573--576",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

note = "Quark Matter 2005: International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, 18th ; Conference date: 04-08-2005 Through 09-08-2005",

}

TY - JOUR

T1 - Direct observation of dijets in central Au+Au collisions with STAR

AU - Magestro, D

AU - Adams, John

AU - Barnby, Lee

AU - Gaillard, Leon

AU - Jones, Peter

AU - Nelson, John

AU - Timmins, Anthony

AU - STAR Collaboration

PY - 2006/8/7

Y1 - 2006/8/7

N2 - We present first results of azimuthal (Δϕ) correlations of high transverse momentum (pT) hadrons from the high-statistics Au+Au dataset collected at RHIC in 2004. Previous correlations measurements observed the disappearance of back-to-back (Δϕ∼π) correlations in central Au+Au collisions, supporting the emerging picture of parton energy loss in dense QCD matter. In the present analysis, increasing the pT thresholds reveals a narrow back-to-back dijet peak which emerges above the decreasing combinatoric background. We study the possible medium modification of the dijet fragmentation function and compare to models, to place constraints on the nature and magnitude of in-medium energy loss.

AB - We present first results of azimuthal (Δϕ) correlations of high transverse momentum (pT) hadrons from the high-statistics Au+Au dataset collected at RHIC in 2004. Previous correlations measurements observed the disappearance of back-to-back (Δϕ∼π) correlations in central Au+Au collisions, supporting the emerging picture of parton energy loss in dense QCD matter. In the present analysis, increasing the pT thresholds reveals a narrow back-to-back dijet peak which emerges above the decreasing combinatoric background. We study the possible medium modification of the dijet fragmentation function and compare to models, to place constraints on the nature and magnitude of in-medium energy loss.

U2 - 10.1016/j.nuclphysa.2006.06.090

DO - 10.1016/j.nuclphysa.2006.06.090

M3 - Article

SN - 0375-9474

VL - 774

SP - 573

EP - 576

JO - Nuclear Physics A

JF - Nuclear Physics A

T2 - Quark Matter 2005: International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, 18th

Y2 - 4 August 2005 through 9 August 2005

ER -

Direct observation of dijets in central Au+Au collisions with STAR

Abstract

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