System-size independence of directed flow at the relativistic heavy-Ion collider

B.I. Abelev; Y. Bai; F. Benedosso; E Braidot; M.A.J. Botje; A. Mischke; T. Peitzmann; M.J. Russcher; O. Grebenyuk; R.J.M. Snellings; N. van der Kolk; M. van Leeuwen

System-size independence of directed flow at the relativistic heavy-Ion collider

B.I. Abelev, Y. Bai, F. Benedosso, E Braidot, M.A.J. Botje, A. Mischke, T. Peitzmann, M.J. Russcher, O. Grebenyuk, R.J.M. Snellings, N. van der Kolk, M. van Leeuwen

Dept of Physics

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Research output: Contribution to journal › Article › Academic › peer-review

Abstract

We measure directed flow (v1) for charged particles in Au+Au and Cu+Cu collisions at √sNN = 200 GeV and 62.4 GeV, as a function of pseudorapidity (η) transverse momentum (pt) and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v1 in different collision systems, and investigate possible explanations for the observed sign change in v1(pt).

Original language	English
Article number	252301
Pages (from-to)	1-6
Journal	Physical Review Letters
Volume	101
Issue number	25
Publication status	Published - 2008

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title = "System-size independence of directed flow at the relativistic heavy-Ion collider",

abstract = "We measure directed flow (v1) for charged particles in Au+Au and Cu+Cu collisions at √sNN = 200 GeV and 62.4 GeV, as a function of pseudorapidity (η) transverse momentum (pt) and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v1 in different collision systems, and investigate possible explanations for the observed sign change in v1(pt).",

author = "B.I. Abelev and Y. Bai and F. Benedosso and E Braidot and M.A.J. Botje and A. Mischke and T. Peitzmann and M.J. Russcher and O. Grebenyuk and R.J.M. Snellings and {van der Kolk}, N. and {van Leeuwen}, M.",

year = "2008",

language = "English",

volume = "101",

pages = "1--6",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "25",

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TY - JOUR

T1 - System-size independence of directed flow at the relativistic heavy-Ion collider

AU - Abelev, B.I.

AU - Bai, Y.

AU - Benedosso, F.

AU - Braidot, E

AU - Botje, M.A.J.

AU - Mischke, A.

AU - Peitzmann, T.

AU - Russcher, M.J.

AU - Grebenyuk, O.

AU - Snellings, R.J.M.

AU - van der Kolk, N.

AU - van Leeuwen, M.

PY - 2008

Y1 - 2008

N2 - We measure directed flow (v1) for charged particles in Au+Au and Cu+Cu collisions at √sNN = 200 GeV and 62.4 GeV, as a function of pseudorapidity (η) transverse momentum (pt) and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v1 in different collision systems, and investigate possible explanations for the observed sign change in v1(pt).

AB - We measure directed flow (v1) for charged particles in Au+Au and Cu+Cu collisions at √sNN = 200 GeV and 62.4 GeV, as a function of pseudorapidity (η) transverse momentum (pt) and collision centrality, based on data from the STAR experiment. We find that the directed flow depends on the incident energy but, contrary to all available model implementations, not on the size of the colliding system at a given centrality. We extend the validity of the limiting fragmentation concept to v1 in different collision systems, and investigate possible explanations for the observed sign change in v1(pt).

M3 - Article

SN - 0031-9007

VL - 101

SP - 1

EP - 6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 252301

ER -

System-size independence of directed flow at the relativistic heavy-Ion collider

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