Near-Side Azimuthal and Pseudorapidity Correlations Using Neutral Strange Baryons and Mesons in d+Au, Cu+Cu, and Au+Au Collisions at √^s_NN = 200 GeV

Authors

• B. Abelev, Yale University
• L. Adamczyk, AGH University of Science and Technology, Poland
• James K. Adkins, University of KentuckyFollow
• G. Agakishiev, Joint Institute for Nuclear Research, Russia
• M. M. Aggarwal, Panjab University, India
• Z. Ahammed, Variable Energy Cyclotron Centre, India
• I. Alekseev, Alikhanov Institute for Theoretical and Experimental Physics, Russia
• A. Aparin, Joint Institute for Nuclear Research, Russia
• D. Arkhipkin, Brookhaven National Laboratory
• E. C. Aschenauer, Brookhaven National Laboratory
• M. U. Ashraf, Tsinghua University, China
• A. Attri, Panjab University, India
• G. S. Averichev, Joint Institute for Nuclear Research, Russia
• X. Bai, Central China Normal University, China
• V. Bairathi, National Institute of Science Education and Research, India
• L. S. Barnby, University of Birmingham, UK
• R. Bellwied, University of Houston
• A. Bhasin, University of Jammu, India
• A. K. Bhati, Panjab University, India
• P. Bhattarai, University of Texas at Austin
• J. Bielcik, Czech Technical University in Prague, Czech Republic
• J. Bielcikova, Nuclear Physics Institute AS CR, Czech Republic
• L. C. Bland, Brookhaven National Laboratory
• M. Bombara, University of Birmingham, UK
• I. G. Bordyuzhin, Alikhanov Institute for Theoretical and Experimental Physics, Russia
• J. Bouchet, Kent State University
• J. D. Brandenburg, Rice University
• A. V. Brandin, National Research Nuclear Univeristy MEPhI, Russia
• I. Bunzarov, Joint Institute for Nuclear Research, Russia
• J. Butterworth, Rice University
• Renee H. Fatemi, University of KentuckyFollow
• Suvarna Ramachandran, University of KentuckyFollow

Abstract

We present measurements of the near side of triggered di-hadron correlations using neutral strange baryons (Λ, Λ⁻) and mesons (K⁰_S) at intermediate transverse momentum (3 < p_T < 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 √^S_NN = 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.

Document Type

Article

Publication Date

7-28-2016

Notes/Citation Information

Published in Physical Review C, v. 94, issue 1, 014910, p. 1-9.

©2016 American Physical Society

The copyright holder has granted permission for posting the article here.

Due to the large number of authors, only the first 30 and the authors affiliated with the University of Kentucky are listed in the author section above. For the complete list of authors, please download this article.

The authors of this article are collectively known as STAR Collaboration.

Digital Object Identifier (DOI)

https://doi.org/10.1103/PhysRevC.94.014910

Funding Information

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.

Repository Citation

Abelev, B.; Adamczyk, L.; Adkins, James K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Ashraf, M. U.; Attri, A.; Averichev, G. S.; Bai, X.; Bairathi, V.; Barnby, L. S.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bombara, M.; Bordyuzhin, I. G.; Bouchet, J.; Brandenburg, J. D.; Brandin, A. V.; Bunzarov, I.; Butterworth, J.; Fatemi, Renee H.; and Ramachandran, Suvarna, "Near-Side Azimuthal and Pseudorapidity Correlations Using Neutral Strange Baryons and Mesons in d+Au, Cu+Cu, and Au+Au Collisions at √^s_NN = 200 GeV" (2016). Physics and Astronomy Faculty Publications. 408.
https://uknowledge.uky.edu/physastron_facpub/408