Strange hadron production in Au+Au collisions at sNN =7.7, 11.5, 19.6, 27, and 39 GeV
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Pre-printDate
2020-09-01Author
Adam, JAdamczyk, L
Adams, JR
Adkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alekseev, I
Anderson, DM
Aoyama, R
Aparin, A
Arkhipkin, D
Aschenauer, EC
Ashraf, MU
Atetalla, F
Attri, A
Averichev, GS
Bairathi, V
Barish, K
Bassill, AJ
Behera, A
Bellwied, R
Bhasin, A
Bhati, AK
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Brandenburg, JD
Brandin, AV
Bryslawskyj, J
Bunzarov, I
Butterworth, J
Caines, H
Calderón De La Barca Sánchez, M
Cebra, D
Chakaberia, I
Chaloupka, P
Chan, BK
Chang, FH
Chang, Z
Chankova-Bunzarova, N
Chatterjee, A
Chattopadhyay, S
Chen, JH
Chen, X
Cheng, J
Cherney, M
Christie, W
Crawford, HJ
Csanád, M
Das, S
Dedovich, TG
Deppner, IM
Derevschikov, AA
Didenko, L
Dilks, C
Dong, X
Drachenberg, JL
Dunlop, JC
Edmonds, T
Elsey, N
Engelage, J
Eppley, G
Esha, R
Esumi, S
Evdokimov, O
Ewigleben, J
Eyser, O
Fatemi, R
Fazio, S
Federic, P
Fedorisin, J
Feng, Y
Filip, P
Finch, E
Fisyak, Y
Fulek, L
Gagliardi, CA
Galatyuk, T
Geurts, F
Gibson, A
Gopal, K
Grosnick, D
Gupta, A
Guryn, W
Hamad, AI
Hamed, A
Harris, JW
He, L
Heppelmann, S
Heppelmann, S
Herrmann, N
Holub, L
Hong, Y
Horvat, S
Huang, B
Huang, HZ
Huang, SL
Huang, T
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http://hdl.handle.net/20.500.12613/4238
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10.1103/PhysRevC.102.034909Abstract
© 2020 American Physical Society. We present STAR measurements of strange hadron (KS0, Λ, Λ, Ξ-, Ξ+, ω-, ω+, and φ) production at midrapidity (|y|<0.5) in Au+Au collisions at sNN = 7.7-39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse-momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (Λ/Λ, Ξ+/Ξ-, ω+/ω-) are presented as well and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (μB/Tch and μS/Tch) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (RCP) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The KS0 RCP shows no suppression for pT up to 3.5 GeV/c at energies of 7.7 and 11.5 GeV. The Λ/KS0 ratio also shows baryon-to-meson enhancement at intermediate pT (≈2.5 GeV/c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.Citation to related work
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http://dx.doi.org/10.34944/dspace/4220