Centrality dependence of neutral pion production in 158-A-GeV Pb-208 + Pb-208 collisions
Jun, 19985 pages
Published in:
- Phys.Rev.Lett. 81 (1998) 4087-4091,
- Phys.Rev.Lett. 84 (2000) 578-579 (erratum)
e-Print:
- nucl-ex/9806004 [nucl-ex]
DOI:
Report number:
- IKP-MS-980601
Experiments:
Citations per year
Abstract:
The production of neutral pions in 158AGeV Pb+Pb collisions has been studied in the WA98 experiment at the CERN SPS. Transverse momentum spectra are studied for the range 0.3 GeV/c < mT-m0 < 4.0 GeV/c. The results for central collisions are compared to various models. The centrality dependence of the neutral pion spectral shape and yield is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with greater than about 30 participating nucleons which is most naturally explained by assuming an equilibrated system.Note:
- 5 pages, Latex, including 3 eps figures, submitted to Phys.Rev.Lett; updated pQCD comparison due to new input from the author, updated references, corrected plotting error in figure 1 Report-no: IKP-MS-980601
- scattering: heavy ion
- lead
- pi0: yield
- dependence: impact parameter
- pi0: radiative decay
- transverse momentum: spectrum
- mass spectrum: transverse
- multiple scattering
- scintillation counter: lead-glass
- experimental results
References(18)
Figures(3)