Beam-energy dependence of the directed flow of protons, antiprotons, and pions in Au+Au collisions

Rapidity-odd directed flow (v1) measurements for charged pions, protons, and antiprotons near midrapidity (y=0) are reported in sNN=7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV Au+Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider. At intermediate impact parameters,...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Physical review letters 2014-04, Vol.112 (16), p.162301-162301, Article 162301
Hauptverfasser:	Adamczyk, L, Adkins, J K, Agakishiev, G, Aggarwal, M M, Ahammed, Z, Alekseev, I, Alford, J, Anson, C D, Aparin, A, Arkhipkin, D, Aschenauer, E C, Averichev, G S, Banerjee, A, Beavis, D R, Bellwied, R, Bhasin, A, Bhati, A K, Bhattarai, P, Bichsel, H, Bielcik, J, Bielcikova, J, Bland, L C, Bordyuzhin, I G, Borowski, W, Bouchet, J, Brandin, A V, Brovko, S G, Bültmann, S, Bunzarov, I, Burton, T P, Butterworth, J, Caines, H, Calderón de la Barca Sánchez, M, Cebra, D, Cendejas, R, Cervantes, M C, Chaloupka, P, Chang, Z, Chattopadhyay, S, Chen, H F, Chen, J H, Chen, L, Cheng, J, Cherney, M, Chikanian, A, Christie, W, Chwastowski, J, Codrington, M J M, Contin, G, Cramer, J G, Crawford, H J, Cui, X, Das, S, Davila Leyva, A, De Silva, L C, Debbe, R R, Dedovich, T G, Deng, J, Derevschikov, A A, Derradi de Souza, R, Dhamija, S, di Ruzza, B, Didenko, L, Dilks, C, Ding, F, Djawotho, P, Dong, X, Drachenberg, J L, Draper, J E, Du, C M, Dunkelberger, L E, Dunlop, J C, Efimov, L G, Engelage, J, Engle, K S, Eppley, G, Eun, L, Evdokimov, O, Eyser, O, Fatemi, R, Fazio, S, Fedorisin, J, Filip, P, Finch, E, Fisyak, Y, Flores, C E, Gagliardi, C A, Gangadharan, D R, Garand, D, Geurts, F, Gibson, A, Girard, M, Gliske, S, Greiner, L, Grosnick, D, Gunarathne, D S, Guo, Y, Gupta, A, Gupta, S, Guryn, W
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Nuclear Experiment NUCLEAR PHYSICS AND RADIATION PHYSICS Physics
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Rapidity-odd directed flow (v1) measurements for charged pions, protons, and antiprotons near midrapidity (y=0) are reported in sNN=7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV Au+Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider. At intermediate impact parameters, the proton and net-proton slope parameter dv1/dy\|y=0 shows a minimum between 11.5 and 19.6 GeV. In addition, the net-proton dv1/dy\|y=0 changes sign twice between 7.7 and 39 GeV. The proton and net-proton results qualitatively resemble predictions of a hydrodynamic model with a first-order phase transition from hadronic matter to deconfined matter, and differ from hadronic transport calculations.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.112.162301