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Title: Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=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 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-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:
; ;  [1]; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [2]
  1. Panjab University, Chandigarh 160014 (India)
  2. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
21419455
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 82; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.82.024912; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOM-ATOM COLLISIONS; BARYON-BARYON INTERACTIONS; CHARGED PARTICLES; COLLISIONS; CORRELATIONS; DISTRIBUTION; FRAGMENTATION; GEV RANGE 100-1000; HADRONS; PARTICLE PRODUCTION; TRANSVERSE MOMENTUM; ATOM COLLISIONS; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRON-HADRON INTERACTIONS; INTERACTIONS; LINEAR MOMENTUM; PARTICLE INTERACTIONS

Citation Formats

Aggarwal, M M, Bhati, A K, Pruthi, N K, Ahammed, Z, Dong, X, Grebenyuk, O, Hjort, E, Horner, M J, Jacobs, P, Kikola, D P, Kiryluk, J, Klein, S R, Masui, H, Matis, H S, Odyniec, G, Olson, D, Ploskon, M A, Poskanzer, A M, Powell, C B, and Ritter, H G. Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=200 GeV measured at the STAR detector. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.82.024912.
Aggarwal, M M, Bhati, A K, Pruthi, N K, Ahammed, Z, Dong, X, Grebenyuk, O, Hjort, E, Horner, M J, Jacobs, P, Kikola, D P, Kiryluk, J, Klein, S R, Masui, H, Matis, H S, Odyniec, G, Olson, D, Ploskon, M A, Poskanzer, A M, Powell, C B, & Ritter, H G. Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=200 GeV measured at the STAR detector. United States. https://doi.org/10.1103/PHYSREVC.82.024912
Aggarwal, M M, Bhati, A K, Pruthi, N K, Ahammed, Z, Dong, X, Grebenyuk, O, Hjort, E, Horner, M J, Jacobs, P, Kikola, D P, Kiryluk, J, Klein, S R, Masui, H, Matis, H S, Odyniec, G, Olson, D, Ploskon, M A, Poskanzer, A M, Powell, C B, and Ritter, H G. Sun . "Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=200 GeV measured at the STAR detector". United States. https://doi.org/10.1103/PHYSREVC.82.024912.
@article{osti_21419455,
title = {Azimuthal di-hadron correlations in d+ Au and Au + Au collisions at {radical}(s{sub NN})=200 GeV measured at the STAR detector},
author = {Aggarwal, M M and Bhati, A K and Pruthi, N K and Ahammed, Z and Dong, X and Grebenyuk, O and Hjort, E and Horner, M J and Jacobs, P and Kikola, D P and Kiryluk, J and Klein, S R and Masui, H and Matis, H S and Odyniec, G and Olson, D and Ploskon, M A and Poskanzer, A M and Powell, C B and Ritter, H G},
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 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-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/21419455}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 82,
place = {United States},
year = {2010},
month = {8}
}