Near-side azimuthal and pseudorapidity correlations using neutral strange baryons and mesons in d+ Au, Cu + Cu, and Au + Au collisions at sNN =200 GeV

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3 Scopus citations

Abstract

We present measurements of the near side of triggered di-hadron correlations using neutral strange baryons (Λ,Λ) and mesons (KS0) at intermediate transverse momentum (3 < pT <6 GeV/c) to look for possible flavor and baryon-meson dependence. This study is performed in d+Au, Cu+Cu, and Au+Au collisions at sNN=200 GeV measured by the STAR experiment at RHIC. The near-side di-hadron correlation contains two structures, a peak which is narrow in azimuth and pseudorapidity consistent with correlations from jet fragmentation, and a correlation in azimuth which is broad in pseudorapidity. The particle composition of the jet-like correlation is determined using identified associated particles. The dependence of the conditional yield of the jet-like correlation on the trigger particle momentum, associated particle momentum, and centrality for correlations with unidentified trigger particles are presented. The neutral strange particle composition in jet-like correlations with unidentified charged particle triggers is not well described by PYTHIA. However, the yield of unidentified particles in jet-like correlations with neutral strange particle triggers is described reasonably well by the same model.

Original languageEnglish
Article number014910
JournalPhysical Review C
Volume94
Issue number1
DOIs
StatePublished - Jul 28 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

Funding

We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, the KISTI Center in Korea, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. NSF, the Ministry of Education and Science of the Russian Federation, NSFC, CAS, MoST, and MoE of China, the National Research Foundation of Korea, NCKU (Taiwan), GA and MSMT of the Czech Republic, FIAS of Germany, DAE, DST, and UGC of India, the National Science Centre of Poland, National Research Foundation, the Ministry of Science, Education and Sports of the Republic of Croatia, and RosAtom of Russia.

FundersFunder number
KISTI Center in Korea
MoE of China
RHIC Operations Group
RosAtom of Russia
National Science Foundation Arctic Social Science Program1352081, 1206009, 1505716
National Science Foundation Arctic Social Science Program
Office of Science Programs
Institute for Nuclear Physics
National Research Foundation South African Research Chair
Department of Science and Technology, Ministry of Science and Technology, India
University Grants Commission
Government of India, Department of Atomic Energy
National Natural Science Foundation of P.R. China
Ministerstvo Školství, Mládeže a Tělovýchovy
Chinese Academy of Sciences
Ministarstvo Obrazovanja, Znanosti i Sporta
Ministry for Education and Science of the Russian Federation
National Research Foundation of Korea
Narodowe Centrum Nauki
Ministry of Science and Technology, Taiwan
National Cheng Kung University Hospital
Raincoast Conservation Foundation

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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