  The present work reports the use of nuclear transparency effect of protons in
proton and deuteron carbon interactions at 4.2 A GeV/c to get information about
the states of nuclear matter. The half angle technique is used to extract the
information on nuclear transparency. The results are compared with Dubna
version of Cascade model. The average values of multiplicity, momentum and
transverse momentum of protons are analyzed as a function of the number of
identified protons in an event. We observed some evidence and trends in the
data which could be considered as transparency effect. Analysis of the results
shows that the leading effect is the basis of the observed transparency. Some
contribution to the observed effect could be the existing short range
correlations and the scaling power law s^-N, for exclusive two body hard
scattering.

Nuclear Experiment