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Nuclear emulsion; Pseudorapidity; scaled factorial moments; limiting fragmentation; energy density.

An experimental analysis of 855 events induced by 14.6 A GeV $^{28}$Si in nuclear emulsion is presented. Mean multiplicities of charged secondary particles produced in the nuclear interactions are studied and compared with the results from the other experiments for the same projectile at 3.7 A GeV as well as data for proton at similar energy (14 GeV). An analysis of pseudorapidity densities of target fragments (black and grey particles) is also performed. The behaviour of the KNO scaling law of the multiplicity distribution for shower particles has been examined. In order to accumulate knowledge about the intermittent behaviour of shower particles, the scaled factorial moments (SFMs) are computed in $\eta$-space and $\phi$-space for a set of data in the $^{28}$Si–AgBr events. Furthermore, validity of limiting fragmentation of shower particles produced in central collision events induced by $^{28}$Si-emulsion interactions has been tested. A crude estimation for the energy density of the nuclear matter formed in the central collision events at our energy has been examined.

Ashwini Kumar¹ G Singh² B K Singh¹

1. High Energy Physics Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
2. Department of Mathematics and Computer Science, State University of New York at Fredonia, New York 14063, USA

Published

July 2013

Manuscript received

21 August 2012

Manuscript revised

18 March 2013

Accepted

26 March 2013