Bulk properties of the medium produced in relativistic heavy-ion collisions from the beam energy scan program

L Adamczyk,E Finch,P Bhattarai,Z Chang,L E Dunkelberger,P Chaloupka,D Arkhipkin,G Agakishiev,O Evdokimov,J Deng,S Esumi,J E Draper,Z Ahammed,G S Averichev,A Attri,J Bouchet,D Cebra,H Caines,R Aoyama,A Behera,L G Efimov,C Dilks,W Christie,J Engelage,A Chatterjee,A A Derevschikov,J M Campbell,S Fazio,N Chankova-Bunzarova,X Dong,J K Adkins,G Eppley,S Chattopadhyay,H J Crawford,M Calderón De La Barca Sánchez,J D Brandenburg,M Cherney,I Bunzarov,I Alekseev,Z Feng,A K Bhati,G Contin,C A Gagliardi,A V Brandin,L Didenko,E C Aschenauer,I Chakaberia,P Filip,L C Bland,P Federicova,I G Bordyuzhin,J C Dunlop,P Federic,D Garand,O Eyser,N Elsey,R Bellwied,T G Dedovich,A Aparin,M M Aggarwal,D M Anderson,A Bhasin,J Ewigleben,V Bairathi,J Cheng,R Esha,N N Ajitanand,S Das,R Fatemi,J L Drachenberg,M U Ashraf,Y Fisyak,Ł Fulek ,D S Brown ,X Chen ,J Fedorišin ,R Debbe ,J Bielčík ,J M Butterworth ,Lc De Silva ,C Flores ,J Bielčíková ,Xiaozhi Bai ,Chen Jh

doi:10.1103/physrevc.96.044904

Abstract

We present measurements of bulk properties of the matter produced in Au+Au collisions at sNN=7.7,11.5,19.6,27, and 39 GeV using identified hadrons (π±, K±, p, and p¯) from the STAR experiment in the Beam Energy Scan (BES) Program at the Relativistic Heavy Ion Collider (RHIC). Midrapidity (|y|<0.1) results for multiplicity densities dN/dy, average transverse momenta 〈pT〉, and particle ratios are presented. The chemical and kinetic freeze-out dynamics at these energies are discussed and presented as a function of collision centrality and energy. These results constitute the systematic measurements of bulk properties of matter formed in heavy-ion collisions over a broad range of energy (or baryon chemical potential) at RHIC.31 MoreReceived 25 January 2017DOI:https://doi.org/10.1103/PhysRevC.96.044904©2017 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasParticle & resonance productionQCD phase transitionsQuark-gluon plasmaRelativistic heavy-ion collisionsThermal & statistical modelsNuclear Physics

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