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Elliptic flow in Au+Au collisions at square root(S)NN = 130 GeV |
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| Authors: | Ackermann K H Adams N Adler C Ahammed Z Ahmad S Allgower C Amsbaugh J Anderson M Anderssen E Arnesen H Arnold L Averichev G S Baldwin A Balewski J Barannikova O Barnby L S Baudot J Beddo M Bekele S Belaga V V Bellwied R Bennett S Bercovitz J Berger J Betts W Bichsel H Bieser F Bland L C Bloomer M Blyth C O Boehm J Bonner B E Bonnet D Bossingham R Botlo M Boucham A Bouillo N Bouvier S Bradley K Brady F P Braithwaite E S Braithwaite W Brandin A Brown R L Brugalette G Byrd C Caines H Calderón de la Barca Sánchez M Cardenas A Carr L Carroll J Castillo J Caylor B Cebra D Chatopadhyay S Chen M L |
| Affiliation: | Argone National Laboratory, Illinois 60439, USA. |
| Abstract: | Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented. |
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