TRANSVERSE-MOMENTUM DISTRIBUTIONS OF NEUTRAL PIONS FROM NUCLEAR COLLISIONS AT 200 AGEV

Authors
ALBRECHT R ANTONENKO V AWES TC BARLAG C BLOOMER MA BLUME C BOCK D BOCK R BOHNE EM BUCHER D CLAUSSEN A CLEWING G EKLUND A FOKIN S FRANZ A GARPMAN S GEURTS F GLASOW R GUSTAFSSON HA GUTBROD HH HOLKER G IDH J IPPOLITOV M JACOBS P KAMERMANS R KAMPERT KH KARADJEV K KOLB BW LEBEDEV A LOHNER H LUND I MANKO V NIKOLAEV S OBENSHAIN FE OSKARSSON A OTTERLUND I PEITZMANN T PLASIL F POSKANZER AM PURSCHKE M RITTER HG SAINI S SANTO R SCHMIDT HR SODERSTROM K SORENSEN SP STANKUS P STEFFENS K STEINHAEUSER P STENLUND E STUKEN D TWENHOFEL C VINOGRADOV A YOUNG GR
Citation
R. Albrecht et al., TRANSVERSE-MOMENTUM DISTRIBUTIONS OF NEUTRAL PIONS FROM NUCLEAR COLLISIONS AT 200 AGEV, EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 5(2), 1998, pp. 255-267
Citations number
49
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
5
Issue
2
Year of publication
1998
Pages
255 - 267
Database
ISI
SICI code
1434-6044(1998)5:2<255:TDONPF>2.0.ZU;2-E
Abstract
New results on transverse mass spectra of neutral pions measured at ce ntral rapidity are presented for impact parameter selected 200 A.GeV S + S and S + Au collisions. The distributions cover more than 8 orders of magnitude in cross section over the range 0.3 GeV/c less than or e qual to p(T) less than or equal to 4.0 GeV/c. Detailed comparisons to results from pp collisions are made. The spectra from all systems show a clear power-law like shape with similar curvature. Collisions of S + Au exhibit a larger mean transverse momentum than pp increasing with centrality. Predictions of string models and by hydrodynamic approach es including collective expansion and decays of short lived resonances are compared to the data and the implications are discussed.