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Scaling of pseudorapidity distributions at c.m. energies up to 0.9 TeV |
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| Authors: | G J Alner R E Ansorge B ?sman C N Booth L Burow P Carlson R S DeWolf A Drees B Eckart G Ekspong I Evangelou A Eyring J -P Fabre C Fuglesang J Gaudaen C Geich-Gimbel B Holl R Hospes D P Johnson K Jon-And F Lotse N Manthos R Meinke D J Munday J E V Ovens W Pelzer J J Reidy J C Rushbrooke H Schmickler F Triantis L Van hamme C Walck C P Ward D R Ward C J S Webber T O White G Wilquet N Yamdagni UA Collaboration |
| Institution: | 1. Cavendish Laboratory, Department of Physics, University, CB 3 OHE, Cambridge, UK 3. Institute of Physics, University, S-11346, Stockholm, Sweden 5. Physikalisches Institut der Universit?t, D-5300, Bonn, Federal Republic of Germany 6. CERN, Geneva, Switzerland 8. Inter-University Institute for High Energies (ULB-VUB), B-1 C, Brussels, Belgium |
| 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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