Production of K0(S) lambda and gamma in 100-GeV/c pion proton interactions Page: 4 of 18
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- 4 -
CERN/D.Ph.II/PHYS 74-27
inelastic collision of a given charged multiplicity; (the charged multi-
plicity cross sections are from ref. 7). The straight line in fig. 7a is
obtained using the formula of ref. 8, and it is seen to approximate the
experimental. points satisfactorily (the decrease at the highest multipli-
cities is caused by phase space effects). The average numbers of KS and
A's are essentially independent of the charged multiplicity.
3. INCLUSIVE DISTRIBUTIONS
Fig. 8 shows the integral over pt of the invariant cross section
2 2E d
f(x 2 2E d) = / for Y, K0 and A.
fxPt) = s d x d p2
t
Results are given only in the backward hemisphere in the centre of mass,
since experimental losses for K0 and A are less severe-here than in the for-
ward hemisphere.
The results for y and KS indicate an exponential decrease as xj in-
creases; the shape of the A distribution suggests that the A's come pre-
dominantly from proton fragmentation. The integral of f(x, pt) over x is
shown in fig. 9.
Fig. 10 gives the rapidity distributions. The distribution for gammas
is presented here also in the forward hemisphere, and it can be seen that -
over two units of rapidity around y % 0 the distribution is in first approxi-
mation flat. No such plateau is seen in the K distributions.
We are deeply indebted to the operating crews of the Fermi NAL
accelerator and of the 30-inch bubble chamber. We would like to thank
our scanning, measuring and computing staffs.
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Berger, E. L.; Cocconi, V. T.; Counihan, M. J.; Humble, S.; Kellner, G.; Kotanski, A. et al. Production of K0(S) lambda and gamma in 100-GeV/c pion proton interactions, article, July 1, 1974; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc896733/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.