Abstract
Rapidity-odd directed-flow measurements at midrapidity are presented for Λ, Λ¯, K±, K0s, and ϕ at √sNN = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV in Au + Au collisions recorded by the Solenoidal Tracker detector at the Relativistic Heavy Ion Collider. These measurements greatly expand the scope of data available to constrain models with differing prescriptions for the equation of state of quantum chromodynamics. Results show good sensitivity for testing a picture where flow is assumed to be imposed before hadron formation and the observed particles are assumed to form via coalescence of constituent quarks. The pattern of departure from a coalescence-inspired sum rule can be a valuable new tool for probing the collision dynamics.
Document Type
Article
Publication Date
2-6-2018
Digital Object Identifier (DOI)
https://doi.org/10.1103/PhysRevLett.120.062301
Funding Information
Funded by SCOAP3.
This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, the Ministry of Education and Science of the Russian Federation, the National Natural Science Foundation of China, the Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the National Research Foundation of Korea, GA and MSMT of the Czech Republic, the Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre of Poland, the National Research Foundation and the Ministry of Science, Education and Sports of the Republic of Croatia, RosAtom of Russia, and the German Bundesministerium für Bildung, Wissenschaft, Forschung and Technologie (BMBF), and the Helmholtz Association.
Repository Citation
Adamczyk, L.; Adams, J. R.; Adkins, James K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Ajitanand, N. N.; Alekseev, I.; Anderson, D. M.; Aoyama, R.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Ashraf, M. U.; Attri, A.; Averichev, G. S.; Bai, X.; Bairathi, V.; Barish, K.; Behera, A.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Bouchet, J.; Brandenburg, J. D.; Fatemi, Renee H.; and Ramachandran, Suvarna, "Beam-Energy Dependence of Directed Flow of Λ, Λ¯, K±, K0s, and ϕ in Au + Au Collisions" (2018). Physics and Astronomy Faculty Publications. 583.
https://uknowledge.uky.edu/physastron_facpub/583
Notes/Citation Information
Published in Physical Review Letters, v. 120, issue 6, 062301, p. 1-7.
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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 or visit: https://doi.org/10.1103/PhysRevLett.120.062301
This group of authors is collectively known as the STAR Collaboration.