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

Scientific paper - Original scientific paper

• Author: M. M. Aggarwal
• Author: ...
• Author: Mirko Planinić
• Author: ...
• Author: Nikola Poljak
• Author: ...
• Author: Y. Zoulkarneeva
• Collaboration: STAR Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Yields, correlation shapes, and mean transverse momenta pT of charged particles associated with intermediate- to high-pT trigger particles (2.5<pT<10 GeV/c) in d+ Au and Au + Au collisions at √sNN=200 GeV are presented. For associated particles at higher pT≳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 pT<2 GeV/c, a large enhancement of the near- (Δϕ~0) and away-side (Δϕ~π) 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 Δϕ~π in central Au + Au collisions.

• Keywords (english): particle; yield particle; production hadron hadron; correlation jet; fragmentation STAR hadron; angular distribution charged particle; transverse momentum interaction; (deuteron nucleus) nucleus nucleus; interaction heavy ion; scattering charged particle; multiplicity Brookhaven RHIC Coll 200 GeV-cms/nucleon
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review C - Nuclear Physics
• Numbering: vol. 82, no. 2, 024912
• p-ISSN: 0556-2813
• e-ISSN: 1089-490X
• DOI: https://doi.org/10.1103/PhysRevC.82.024912
• URN:NBN: urn:nbn:hr:217:233590
• Publication: 2010
• Project: Number: 119-0982887-1006; Title (croatian): Istraživanje hadronskih sustava upotrebom relativističkih projektila; Leader: Mirko Planinić; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: http://link.aps.org/doi/10.1103/PhysRevC.82.024912
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2010) by the American Physical Society. Received 14 April 2010; published 30 August 2010.
• Created on: 2019-11-02 19:07:43