Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector

doi:https://doi.org/10.1103/PhysRevC.82.024912

Title: Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector

Full Record
Other Related Research

Abstract

Yields, correlation shapes, and mean transverse momenta p{sub T} of charged particles associated with intermediate- to high-p{sub T} trigger particles (2.5 < p{sub T} < 10 GeV/c) in d+ Au and Au + Au collisions at {radical}s{sub NN} = 200 GeV are presented. For associated particles at higher p{sub T} {approx}> 2.5 GeV/c, narrow correlation peaks are seen in d + Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle p{sub T} < 2 GeV/c, a large enhancement of the near-({Delta}{phi}{approx}0) and away-side ({Delta}{phi}{approx}{pi}) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au + Au collisions compared to d + Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at {Delta}{phi}{approx}{pi} in central Au + Au collisions.

Authors:: Aggarwal, M M; Dunlop, J

Publication Date:: 2010-08-30

Research Org.:: Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider

Sponsoring Org.:: DOE - Office Of Science

OSTI Identifier:: 993059

Report Number(s):: BNL-94216-2010-JA
Journal ID: ISSN 0556-2813; PRVCAN; R&D Project: PO-003; KB020212; TRN: US1007911

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: Physical Review, C (Nuclear Physics)

Additional Journal Information:: Journal Volume: 82; Journal Issue: 2; Journal ID: ISSN 0556-2813

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHARGED PARTICLES; DISTRIBUTION; FRAGMENTATION; PARTICLE PRODUCTION; TRANSVERSE MOMENTUM; DEUTERIUM; GOLD; COLLISIONS; relativistic heavy ion collider

Citation Formats


                    Aggarwal, M M, Dunlop, J, and et al. Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector.  United States: N. p., 2010. 
        Web.  doi:10.1103/PhysRevC.82.024912.

Copy to clipboard


                    Aggarwal, M M, Dunlop, J, & et al. Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector.  United States.  https://doi.org/10.1103/PhysRevC.82.024912

Copy to clipboard


                    Aggarwal, M M, Dunlop, J, and et al. Mon .  
        "Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector".  United States.  https://doi.org/10.1103/PhysRevC.82.024912.

Copy to clipboard


                    
@article{osti_993059,

  title        = {Azimuthal di-hadron correlations in d + Au and Au+Au collisions at √sNN = 200 GeV measured at the STAR detector},

  author       = {Aggarwal, M M and Dunlop, J and et al.},

  abstractNote = {Yields, correlation shapes, and mean transverse momenta p{sub T} of charged particles associated with intermediate- to high-p{sub T} trigger particles (2.5 < p{sub T} < 10 GeV/c) in d+ Au and Au + Au collisions at {radical}s{sub NN} = 200 GeV are presented. For associated particles at higher p{sub T} {approx}> 2.5 GeV/c, narrow correlation peaks are seen in d + Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle p{sub T} < 2 GeV/c, a large enhancement of the near-({Delta}{phi}{approx}0) and away-side ({Delta}{phi}{approx}{pi}) associated yields is found, together with a strong broadening of the away-side azimuthal distributions in Au + Au collisions compared to d + Au measurements, suggesting that other particle production mechanisms play a role. This is further supported by the observed significant softening of the away-side associated particle yield distribution at {Delta}{phi}{approx}{pi} in central Au + Au collisions.},

  doi          = {10.1103/PhysRevC.82.024912},

  url          = {https://www.osti.gov/biblio/993059},
  journal      = {Physical Review, C (Nuclear Physics)},

  issn         = {0556-2813},

  number       = 2,

  volume       = 82,

  place        = {United States},

  year         = {2010},

  month        = {8}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1103/PhysRevC.82.024912

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=200 GeV measured at the STAR detector

Journal Article Aggarwal, M M ; Bhati, A K ; Pruthi, N K ; ... - Physical Review. C, Nuclear Physics

Yields, correlation shapes, and mean transverse momenta p{sub T} of charged particles associated with intermediate- to high-p{sub T} trigger particles (2.5<p{sub T}<10 GeV/c) in d+ Au and Au + Au collisions at {radical}(s{sub N{sub N}})=200 GeV are presented. For associated particles at higher p{sub T} > or approx. 2.5 GeV/c, narrow correlation peaks are seen in d+ Au and Au + Au, indicating that the main production mechanism is jet fragmentation. At lower associated particle p{sub T}<2 GeV/c, a large enhancement of the near- ({Delta}{phi}{approx}0) and away-side ({Delta}{phi}{approx}{pi}) associated yields is found, together with a strong broadening of the away-sidemore »« less
https://doi.org/10.1103/PHYSREVC.82.024912
Dihadron azimuthal correlations in Au+Au collisions at {radical}(s{sub NN})=200 GeV

Journal Article Adare, A ; Bickley, A A ; Ellinghaus, F ; ... - Physical Review. C, Nuclear Physics

Azimuthal angle ({delta}{phi}) correlations are presented for a broad range of transverse momentum (0.4<p{sub T}<10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at {radical}(s{sub NN})=200 GeV. With increasing p{sub T}, the away-side {delta}{phi} distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons with p+p data suggest that the away-side distribution can be divided into a partially suppressed 'head' region centered at {delta}{phi}{approx}{pi}, and an enhanced 'shoulder' region centered at {delta}{phi}{approx}{pi}{+-}1.1. The p{sub T} spectrum for the associated hadrons in the head region softens towardmore »« less
https://doi.org/10.1103/PHYSREVC.78.014901
Dihadron Azimuthal Correlations in Au+Au Collisions at s_NN = 200 GeV

Journal Article Adare, A. ; Awes, Terry C ; Cianciolo, Vince ; ... - Physical Review C

Azimuthal angle ({Delta}{sup {phi}}) correlations are presented for a broad range of transverse momentum (0.4 < p{sub T} < 10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at {radical} s{sub NN} = 200 GeV. With increasing p{sub T}, the away-side {Delta}{sup {phi}} distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons with p+p data suggest that the away-side distribution can be divided into a partially suppressed 'head' region centered at {Delta}{sup {phi}} {approx} {pi}, and an enhanced 'shoulder' region centered at {Delta}{sup {phi}} {approx}more »« less
https://doi.org/10.1103/PhysRevC.78.014901
PHENIX study of dihadron correlations in Au plus Au collisions at root s(NN)=200 GeV: jet quenching and medium response

Journal Article Jia, J ; PHENIX Collaboration - Indian Journal of Physics

We provide a detailed survey study of dihadron azimuthal angle ({Delta}{phi}) correlations in a broad range of transverse momentum (0.4 < p{sub T} < 10 GeV/c) and centrality (0-92%) in Au+Au collisions at {radical}s{sub NN} = 200 GeV. The evolution of the jet shape and yield with p{sub T} seems to suggest two distinct components at the away-side pairs: a suppressed jet fragmentation component around {Delta}{phi} {approx} {pi}, and a medium-induced components around |{Delta}{phi}-{pi}| {approx} 1.1. The former dominates p{sub T} > 5 GeV/c and the later dominates at p{sub T} < 4 GeV/c.
https://doi.org/10.1007/s12648-011-0033-7
Azimuthal Anisotropy of π0 Production in Au+Au Collisions at √sNN=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

Journal Article Adare, A ; PHENIX Collaboration - Physical Review Letters

We have measured the azimuthal anisotropy of {pi}{sup 0} production for 1 < p{sub T} < 18 GeV/c for Au+Au collisions at {radical} s{sub NN} = 200 GeV. The observed anisotropy shows a gradual decrease for 3 {approx}< p{sub T} {approx}< 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least {approx}10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-lengthmore »« less
https://doi.org/10.1103/PhysRevLett.105.142301

Similar Records