Hadronization geometry from net-charge angular correlations on momentum √ subspace ( η , φ ) in Au – Au collisions at sNN = 130 GeV STAR Collaboration

J. Adams,M. M. Aggarwal, Z. Ahammed,J. Amonett,B. D. Anderson,D. Arkhipkin,G. S. Averichev,S. K. Badyal, Y. Bai,J. Balewski,O. Barannikova,L. S. Barnby,J. Baudot,S. Bekele,V. V. Belaga,A. Bellingeri-Laurikainen,R. Bellwied,J. Berger,B. I. Bezverkhny,S. Bharadwaj, Ah,A. Bhasin, A. K. Bhati,V. S. Bhatia, H. Bichsel, J. Bielcik, J. Bielcikova, A. Billmeier,L. C. Bland, M. Botje, A. Boucham, J. Bouchet, A. V. Brandin, A. Bravar, M. Bystersky, R. V. Cadman,M. Calderón de la Barca Sánchez, D. Cebra, P. Chaloupka,S. Chattopadhyay, A. Chikanian, H. A. Choi, W. Christie,H. J. Crawford,M. M. de Moura, T. G. Dedovich,M. DePhillips, A. A. Derevschikov,L. Didenko, T. Dietel,S. M. Dogra,J. E. Draper,A. K. Dubey,V. B. Dunin,J. C. Dunlop,M. R. Dutta Mazumdar, V. Eckardt,W. R. Edwards, L. G. Efimov,V. Emelianov,J. Engelage, P. Fachini, J. Faivre,R. Fatemi, J. Fedorisin, Y. Fisyak,V. Ghazikhanian,S. M. Guertin,A. Gupta, N. Gupta,T. J. Hallman, B. Hippolyte, G. Igo,P. G. Jones,S. Kabana,A. Kechechyan, J. Kiryluk,T. Kollegger, M. Kopytine, L. Kotchenda,P. Kravtsov,V. I. Kravtsov, K. Krueger,A. I. Kulikov,R. Kh. Kutuev, A. A. Kuznetsov, F. Laue,J. Lauret,A. Lebedev

semanticscholar（2006）

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摘要

We present the first measurements of charge-dependent correlations on angular difference variables η1 − η2 (pseudorapidity) and φ1 − φ2 √ (azimuth) for primary charged hadrons with transverse momentum 0.15 � pt � 2 GeV/c and |η| � 1.3 from Au–Au collisions at = sNN 130 GeV. We observe correlation structures not predicted by theory but consistent with evolution of hadron emission geometry with increasing centrality from one-dimensional fragmentation of color strings along the beam direction to an at least two-dimensional hadronization geometry along the beam and azimuth directions of a hadron-opaque bulk medium.  2006 Elsevier B.V. Open access under CC BY license. PACS: 24.60.Ky; 25.75.Gz

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