DOI: 10.1140/epjc/s2003-01443-6
Correlations between multiplicities and average transverse momentum in the percolating color strings approach
M.A. Braun1, 2, R.S. Kolevatov1, C. Pajares2 and V.V. Vechernin11 Department of High-Energy Physics, S. Petersburg University, 198504 S. Petersburg, Russia
2 Department of Particle Physics, University of Santiago de Compostela, 15704 Santiago de Compostela, Spain
(Received: 4 July 2003 / Revised version: 12 September 2003 / / Published online: 18 December 2003)
Abstract
Long range multiplicity-multiplicity,
pT2-multiplicity and
p2T-
p2T correlations are studied in the
percolating color string picture under different assumptions of the dynamics of
the string interaction. It is found that the strength of these correlations is
rather insensitive to these assumptions; nor is it sensitive to the geometry of
the fused string clusters that formed, the percolation phase transition in
particular. Both multiplicity-multiplicity and
pT2 -multiplicity correlations are found to scale and depend only on the
string density.
pT2-multiplicity correlations, which are
absent in the independent string picture, are found to be of the order of 10%
for central heavy ion collisions and can serve as a clear signature of string
fusion. In contrast
p2T-
p2T correlations
turned out to be inversely proportional to the number of strings and therefore
to be very small for realistic collisions.
© Società Italiana di Fisica, Springer-Verlag 2004
