Scaling of Pseudorapidity Distributions at c.m. Energies Up to 0.9-TeV

=200 and 900 GeV. The data were obtained at the CERN antiproton-proton Collider operated in a new pulsed mode. The rise of the central density ρ(0) at energies up to

\sqrt s

=900 GeV has been studied. A new form of central region scaling is found involving the densityρn(0) for charged multiplicityn, namely that the scaled central densityρn(0)/ρ(0) expressed as a function ofz=n/〈n〉 is independent ofs. Scaling in the fragmentation region holds to 10–20%, and the small amount of scalebreaking observed here could be accommodated within the framework suggested by Wdowcyk and Wolfendale to account for both accelerator and cosmic ray data.

ANTI-P P: COLLIDING BEAMS
COLLIDING BEAMS: ANTI-P P
ANTI-P P: INELASTIC SCATTERING
INELASTIC SCATTERING: ANTI-P P
BEAM: PULSED
PULSED: BEAM
HADRON: HADROPRODUCTION
HADROPRODUCTION: HADRON
CHARGED PARTICLE: MULTIPLE PRODUCTION
MULTIPLE PRODUCTION: CHARGED PARTICLE

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