Abstract
New data are presented on charged particle pseudorapidity distributions for inelastic events produced at c.m. energies\(\sqrt s \)=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 densityρ n (0) for charged multiplicityn, namely that the scaled central densityρ n (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.
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UA5 Collaboration., Alner, G.J., Ansorge, R.E. et al. Scaling of pseudorapidity distributions at c.m. energies up to 0.9 TeV. Z. Phys. C - Particles and Fields 33, 1–6 (1986). https://doi.org/10.1007/BF01410446
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DOI: https://doi.org/10.1007/BF01410446