Eur. Phys. J. C 25, 249-257 (2002)
DOI: 10.1007/s10052-002-0989-8
Cumulative particle production and percolation of strings
M.A. Braun, E.G. Ferreiro, F. del Moral and C. PajaresDepartment of Particle Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
(Received: 28 November 2001 / Revised version: 15 May 2002 / Published online: 12 July 2002 )
Abstract
Calculations of the production rate of particles with
x>1
in nuclear collisions due to the interaction of colour strings
are
presented. Momentum and colour sum rules are used to determine
the
fragmentation functions of fused strings. Mechanisms of the
string interaction are considered with total and partial overlapping
in the transverse plane.
The results reveal a strong dependence of the chosen
mechanism. In the percolation scenario with partial overlapping
the
x-dependence of the production rates agrees well with the
existing
data. The magnitude of the rates for
production is in
agreement
with experiment. However the rates for the protons are substantially
below
the data.
© Società Italiana di Fisica, Springer-Verlag 2002
