Abstract
Transverse momentum (p T) distributions fo inclusive photons and neutral pions at midrapidity are measured with a lead glass calorimeter in 60 and are measured with a lead glass calorimeter in 60 and 200A·Gev16O+nucleus and and proton+nucleus reactions. Inclusive photon distributions are compared for central and peripheral reactions. The degree of centrality is determined either from the charged particle multiplicity or from the remaining projectile energy in the forward direction. Deviations from a nucleus+nucleus interaction model based upon linear extrapolation from p+p reactions are observed in central16O+Au data. The variation of theaverage transverse momentum is investigated as function of centrality. The target-mass and energy dependence of π0p T distributions are presented. For16O+Au a change of slope in these distributions is observed atp t≈0.8 GeV/c compatible with hydrodynamic expansion models.
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L. McLeran, B. Svetisky: Phys. Lett. B98 (1981) 195; T. Celik, J. Engels, H. Satz: Nucl. Phys. B256 (1985) 670
M. Jacob, H. Satz (eds.): Quark Matter Formation and heavy Ion Collisions. Proceedings of the Bielefeld Workshop, 1982. Singapore: World Scientific 1982
A. Bamberger et al.: Phys. Lett. B184 (1987) 271
R. Albrecht et al.: WA 80 Collab., Phys. Lett. B199 (1987) 297
T.H. Burnett et al.: Phys. Rev. Lett. 57 (1986) 3249
E.V. Shuryak, O.V. Zhirov: Phys. Lett. B171 (1986) 99
H.H. Gutbrod et al.: GSI preprint GSI-85-32, August 1985 and CERN SPSC/85-39/M406
I. Lund, et al., WA 80 Collab. Z. Phys. C—Particles and Fields 38 (1988) 51
B. Nilsson-Almqvist, E. Stenlund: Comput. Phys. Commun. 43 (1987) 387
W. Bell et al.: Z. Phys. C — Particles and Fields 27 (1985) 191
M. Lev, B. Petersson: Z. Phys. C—Particles and Fields 21 (1983) 155
B. Nilsson-Almqvist: Proceedings of the HEP 87 conference, vol. I, p. 481. Uppsala, 1987
D. Antreasyan et al.: Phys. Rev. D 19 (1979) 764
P. van Hal, NA 22 Collab.: Thesis, CERN 1987
A. Breakstone et al.: Phys. Lett. B183 (1987) 227
A.L.S. Angelis et al.: Phys. Lett. B185 (1987) 213
E.V. Shuryak: Phys. Rep. 61 (1980) 71
M. Danos, J. Rafelski: Phys. Rev. D27 (1983) 671
M. Kataja et al.: Phys. Rev. D34 (1986) 2755
J.P. Blaizot, J.Y. Ollitrault: Phys. Lett. B191 (1987) 21
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WA 80 Collaboration., Albrecht, R., Awes, T.C. et al. Neutral transverse momentum spectra in 60 and 200A·GeV16O+nucleus and proton+nucleus reactions. Z. Phys. C - Particles and Fields 38, 97–103 (1988). https://doi.org/10.1007/BF01574521
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DOI: https://doi.org/10.1007/BF01574521