skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

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:
;
Publication Date:
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.
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
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.
@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}
}