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

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    Genre
    Journal Article
    Date
    2015-07-10
    Author
    Adamczyk, L
    Adkins, JK
    Agakishiev, G
    Aggarwal, MM
    Ahammed, Z
    Alekseev, I
    Alford, J
    Anson, CD
    Aparin, A
    Arkhipkin, D
    Aschenauer, EC
    Averichev, GS
    Banerjee, A
    Beavis, DR
    Bellwied, R
    Bhasin, A
    Bhati, AK
    Bhattarai, P
    Bichsel, H
    Bielcik, J
    Bielcikova, J
    Bland, LC
    Bordyuzhin, IG
    Borowski, W
    Bouchet, J
    Brandin, AV
    Brovko, SG
    Bültmann, S
    Bunzarov, I
    Burton, TP
    Butterworth, J
    Caines, H
    Calderón De La Barca Sánchez, M
    Cebra, D
    Cendejas, R
    Cervantes, MC
    Chaloupka, P
    Chang, Z
    Chattopadhyay, S
    Chen, HF
    Chen, JH
    Chen, L
    Cheng, J
    Cherney, M
    Chikanian, A
    Christie, W
    Chwastowski, J
    Codrington, MJM
    Contin, G
    Cramer, JG
    Crawford, HJ
    Cui, X
    Das, S
    Davila Leyva, A
    De Silva, LC
    Debbe, RR
    Dedovich, TG
    Deng, J
    Derevschikov, AA
    Derradi De Souza, R
    Dhamija, S
    Di Ruzza, B
    Didenko, L
    Dilks, C
    Ding, F
    Djawotho, P
    Dong, X
    Drachenberg, JL
    Draper, JE
    Du, CM
    Dunkelberger, LE
    Dunlop, JC
    Efimov, LG
    Engelage, J
    Engle, KS
    Eppley, G
    Eun, L
    Evdokimov, O
    Eyser, O
    Fatemi, R
    Fazio, S
    Fedorisin, J
    Filip, P
    Finch, E
    Fisyak, Y
    Flores, CE
    Gagliardi, CA
    Gangadharan, DR
    Garand, D
    Geurts, F
    Gibson, A
    Girard, M
    Gliske, S
    Greiner, L
    Grosnick, D
    Gunarathne, DS
    Guo, Y
    Gupta, A
    Gupta, S
    Guryn, W
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    Subject
    nucl-ex
    nucl-ex
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5783
    
    Metadata
    Show full item record
    DOI
    10.1103/PhysRevC.92.014904
    Abstract
    © 2015 American Physical Society. 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 BNL Relativistic Heavy Ion Collider Beam Energy Scan program. The extracted correlation lengths (Hanbury-Brown-Twiss 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.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review C - Nuclear Physics
    ADA compliance
    For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5765
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