Yy. Guo et al., Monte Carlo study of the dynamical fluctuation properties inside jets in high energy hadron-hadron collisions, HIGH EN P N, 25(11), 2001, pp. 1084-1088
Citations number
19
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
The dynamical fluctuations inside jets in the p-p collisions at CERN-Sp (p)
over barS collider are studied using Monte Carlo method. The event sample
is produced using the LUND Monte Carlo generator PYTHIA5.5(JETSET7.3). The
jets are identified by "cone" jet-algorithm. The vector sum of the momenta
of all the particles inside a jet is defined as the axis of this jet. Rapid
ity gamma, transverse momentum p(t) and azimuzal angle phi are defined with
respect to this axis. Second order factorial moments are calculated for th
ese variables and the Hurst exponents H-ij = ln lambda (i)/ln lambda (j) =
(1 + gamma (j))/(1 + gamma (i)) are obtained. The results show that H-ypt a
pproximate to 0.74, H-y phi approximate to 0.82 both are less than unity, w
hile H-pt phi approximate to 1.11 is near to unity. This means that the dyn
amical fluctuations inside jets have approximately the similar property as
those in fixed-target hadron-hadron collisions at SPS, i.e. anisotropic in
the longitudinal-transverse directions while isotropic in the transverse pl
an.