Abstract
We report on the measurement of J/ψ production in the dielectron channel at midrapidity (|y| < 1) in p + p and d + Au collisions at √sNN = 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider. The transverse momentum pTspectra in p + p for pT < 4 GeV/c and d + Au collisions for pT < 3 GeV/c are presented. These measurements extend the STAR coverage for J/ψ production in p + p collisions to low pT. The ⟨p2T⟩ from the measured J/ψ invariant cross section in p + p and d + Au collisions are evaluated and compared to similar measurements at other collision energies. The nuclear modification factor for J/ψ is extracted as a function of pT and collision centrality in d + Au and compared to model calculations using the modified nuclear parton distribution function and a final-state J/ψ nuclear absorption cross section.
Document Type
Article
Publication Date
6-10-2016
Digital Object Identifier (DOI)
https://doi.org/10.1103/PhysRevC.93.064904
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
Adamczyk, L.; Adkins, James K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Attri, A.; Averichev, G. S.; Bai, X.; Bairathi, V.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Bouchet, J.; Brandenburg, J. D.; Brandin, A. V.; Bunzarov, I.; Butterworth, J.; Caines, H.; Calderón de la Barca Sánchez, M.; Campbell, J. M.; Cebra, D.; Fatemi, Renee H.; and Ramachandran, Suvarna, "J/ψ Production at Low Transverse Momentum in p + p and d + Au Collisions at √sNN = 200 GeV" (2016). Physics and Astronomy Faculty Publications. 412.
https://uknowledge.uky.edu/physastron_facpub/412
Notes/Citation Information
Published in Physical Review C, v. 93, issue 6, 064904, p. 1-11.
©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.