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Title: Elliptic flow in Au+Au collisions at √( sNN) = 130 GeV.

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 √( sNN) = 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.

Authors:
 [1];  [2];  [3];  [4];  [4];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [5];  [6]
  1. Max-Planck-Institut fuer Physik, Munich (Germany)
  2. Rice Univ., Houston, TX (United States)
  3. Univ. of Frankfurt, Frankfurt (Germany)
  4. Purdue Univ., West Lafayette, IN (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
STAR Collaboration
OSTI Identifier:
943085
Report Number(s):
ANL-HEP-PR-00-105
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1000549
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 86; Journal Issue: 3 ; Jan. 15, 2001; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; BROOKHAVEN RHIC; CHARGED PARTICLES; COLLIDING BEAMS; COLLISIONS; PERIPHERAL COLLISIONS; THERMALIZATION; TIME PROJECTION CHAMBERS; TRANSVERSE MOMENTUM

Citation Formats

Ackermann, K. H., Adams, N., Adler, C., Ahammed, Z., Ahmad, S., Beddo, M., Grosnick, D., Hill, D., Krueger, K., LeCompte, T., Lopiano, D., Spinka, H. M., Underwood, D. G., Yokosawa, A., and Hallman, Timothy J. Elliptic flow in Au+Au collisions at √(sNN) = 130 GeV.. United States: N. p., 2001. Web. doi:10.1103/PhysRevLett.86.402.
Ackermann, K. H., Adams, N., Adler, C., Ahammed, Z., Ahmad, S., Beddo, M., Grosnick, D., Hill, D., Krueger, K., LeCompte, T., Lopiano, D., Spinka, H. M., Underwood, D. G., Yokosawa, A., & Hallman, Timothy J. Elliptic flow in Au+Au collisions at √(sNN) = 130 GeV.. United States. doi:10.1103/PhysRevLett.86.402.
Ackermann, K. H., Adams, N., Adler, C., Ahammed, Z., Ahmad, S., Beddo, M., Grosnick, D., Hill, D., Krueger, K., LeCompte, T., Lopiano, D., Spinka, H. M., Underwood, D. G., Yokosawa, A., and Hallman, Timothy J. Mon . "Elliptic flow in Au+Au collisions at √(sNN) = 130 GeV.". United States. doi:10.1103/PhysRevLett.86.402.
@article{osti_943085,
title = {Elliptic flow in Au+Au collisions at √(sNN) = 130 GeV.},
author = {Ackermann, K. H. and Adams, N. and Adler, C. and Ahammed, Z. and Ahmad, S. and Beddo, M. and Grosnick, D. and Hill, D. and Krueger, K. and LeCompte, T. and Lopiano, D. and Spinka, H. M. and Underwood, D. G. and Yokosawa, A. and Hallman, Timothy J.},
abstractNote = {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 √(sNN) = 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.},
doi = {10.1103/PhysRevLett.86.402},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 3 ; Jan. 15, 2001,
volume = 86,
place = {United States},
year = {2001},
month = {1}
}