Details

Autor(en) / Beteiligte

• 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.

Titel

Beam-energy-dependent two-pion interferometry and the freeze-out eccentricity of pions measured in heavy ion collisions at the STAR detector

Ist Teil von

• Physical review. C, Nuclear physics, 2015-07, Vol.92 (1), Article 014904

Ort / Verlag

United States: American Physical Society (APS)

Erscheinungsjahr

2015

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• In this study, we present results of analyses of two-pion interferometry in Au+Au collisions at √sNN = 7.7, 11.5, 19.6, 27, 39, 62.4, and 200 GeV measured in the STAR detector as part of the RHIC Beam Energy Scan program. The extracted correlation lengths (HBT radii) are studied as a function of beam energy, azimuthal angle relative to the reaction plane, centrality, and transverse mass (mT) of the particles. The azimuthal analysis allows extraction of the eccentricity of the entire fireball at kinetic freeze-out. The energy dependence of this observable is expected to be sensitive to changes in the equation of state. A new global fit method is studied as an alternate method to directly measure the parameters in the azimuthal analysis. The eccentricity shows a monotonic decrease with beam energy that is qualitatively consistent with the trend from all model predictions and quantitatively consistent with a hadronic transport model.