| Article | |
| Report number | nucl-ex/9906006 ; CERN-EP-98-155 |
| Title | Two-proton correlations near midrapidity in $p$ + Pb and S + Pb collisions at the CERN SPS |
| Related title | SUPER PROTON SYNCHROTRON MIDRAPIDITY |
| Author(s) |
Bøggild, H (Bohr Inst.) ; Boissevain, J (Los Alamos) ; Conin, L (SUBATECH, Nantes) ; Dodd, J (Columbia U.) ; Erazmus, B (SUBATECH, Nantes) ; Esumi, S (Hiroshima U.) ; Fabjan, C.W (CERN) ; Fields, D.E (Los Alamos) ; Franz, A (CERN) ; Hansen, K.H (Bohr Inst.) ; Holzer, E.B (CERN) ; Humanic, T.J (Ohio State U.) ; Jacak, B.V (SUNY, Stony Brook) ; Jayanti, R (Ohio State U. ; Pittsburgh U.) ; Kalechofsky, H (Ohio State U. ; Pittsburgh U.) ; Lee, Y.Y (Ohio State U. ; Pittsburgh U.) ; Leltchouk, M (Columbia U.) ; Lörstad, B (Lund U.) ; Maeda, N (Hiroshima U.) ; Martin, L (SUBATECH, Nantes) ; Medvedev, A (Columbia U.) ; Miyabayashi, A (Lund U.) ; Murray, M (Texas A-M) ; Nishimura, S (Hiroshima U.) ; Paic, G (SUBATECH, Nantes) ; Pandey, S.U (Ohio State U. ; Pittsburgh U.) ; Piuz, F (CERN) ; Pluta, J (SUBATECH, Nantes) ; Polychronakos, V (Brookhaven) ; Potekhin, M (Columbia U.) ; Poulard, G (CERN) ; Sakaguchi, A (Hiroshima U.) ; Sarabura, M (Los Alamos) ; Schmidt-Sørensen, J (Lund U.) ; Spegel, M (CERN) ; Simon-Gillo, J (Los Alamos) ; Sondheim, W (Los Alamos) ; Sugitate, T (Hiroshima U.) ; Sullivan, J.P (Los Alamos) ; Sumi, Y (Hiroshima U.) ; van Hecke, H (Los Alamos) ; Willis, W.J (Columbia U.) ; Wolf, K (Texas A-M) ; Xu, N (Los Alamos) |
| Affiliation | (Niels Bohr Inst. Copenhagen) ; (Los Alamos) ; (SUBATECH, Nantes) ; (Columbia Univ. New York) ; (Hiroshima Univ. Higashi-Hiroshima) ; (CERN) ; (Ohio State Univ. Columbus) ; (SUNY Stony Brook) ; (Univ. Pittsburgh) ; (Univ. Lund) ; (Texas A&M Univ. College Station) ; (Brookhaven National Laboratory Upton) |
| Publication | 1999-07-08 |
| Imprint | 6 Oct 1998 |
| Number of pages | 9 |
| Note | Comments: 10 pages (LaTeX) text, 4 (EPS) figures; accepted for publication in Phys. Lett. B 10 pages (LaTeX) text, 4 (EPS) figures; accepted for publication in Phys. Lett. B |
| In: | Phys. Lett. B 458 (1999) 181-189 |
| DOI | 10.1016/S0370-2693(99)00614-0 |
| Subject category | Particle Physics - Experiment ; Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN SPS ; NA44 |
| Abstract | Correlations of two protons emitted near midrapidity in $p$ + Pb collisions at 450 GeV/c and S + Pb collisions at 200 AGeV/c are presented, as measured by the NA44 Experiment. The correlation effect, which arises as a result of final state interactions and Fermi-Dirac statistics, is related to the space-time characteristics of proton emission. The measured source sizes are smaller than the size of the target lead nucleus but larger than the sizes of the projectiles. A dependence on the collision centrality is observed; the source size increases with decreasing impact parameter. Proton source sizes near midrapidity appear to be smaller than those of pions in the same interactions. Quantitative agreement with the results of RQMD (v1.08) simulations is found for $p$ + Pb collisions. For S + Pb collisions the measured correlation effect is somewhat weaker than that predicted by the model simulations, implying either a larger source size or larger contribution of protons from long-lived particle decays. |
| Copyright/License | Copyright @ unknown. Published by Elsevier B.V. |
Corresponding record in: Inspire
Notice créée le 1998-10-22, modifiée le 2024-05-08