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Phys Rev Lett. 2006 Jul 07;97(1):012301. doi: 10.1103/PhysRevLett.97.012301. Epub 2006 Jul 07.

Energy dependence of directed flow over a wide range of pseudorapidity in Au + Au collisions at the BNL Relativistic Heavy Ion Collider.

Physical review letters

B B Back, M D Baker, M Ballintijn, D S Barton, R R Betts, A A Bickley, R Bindel, A Budzanowski, W Busza, A Carroll, Z Chai, M P Decowski, E García, T Gburek, N George, K Gulbrandsen, S Gushue, C Halliwell, J Hamblen, M Hauer, G A Heintzelman, C Henderson, D J Hofman, R S Hollis, R Hołyński, B Holzman, A Iordanova, E Johnson, J L Kane, J Katzy, N Khan, W Kucewicz, P Kulinich, C M Kuo, W T Lin, S Manly, D McLeod, A C Mignerey, R Nouicer, A Olszewski, R Pak, I C Park, H Pernegger, C Reed, L P Remsberg, M Reuter, C Roland, G Roland, L Rosenberg, J Sagerer, P Sarin, P Sawicki, H Seals, I Sedykh, W Skulski, C E Smith, M A Stankiewicz, P Steinberg, G S F Stephans, A Sukhanov, J-L Tang, M B Tonjes, A Trzupek, C Vale, G J van Nieuwenhuizen, S S Vaurynovich, R Verdier, G I Veres, E Wenger, F L H Wolfs, B Wosiek, K Woźniak, A H Wuosmaa, B Wysłouch,

Affiliations

  1. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439-4843, USA.

PMID: 16907368 DOI: 10.1103/PhysRevLett.97.012301

Abstract

We report on measurements of directed flow as a function of pseudorapidity in Au + Au collisions at energies of square root of SNN = 19.6, 62.4, 130 and 200 GeV as measured by the PHOBOS detector at the BNL Relativistic Heavy Ion Collider. These results are particularly valuable because of the extensive, continuous pseudorapidity coverage of the PHOBOS detector. There is no significant indication of structure near midrapidity and the data surprisingly exhibit extended longitudinal scaling similar to that seen for elliptic flow and charged particle pseudorapidity density.

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