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Antideuteron Production in 158 A GeV / c Pb + Pb Collisions

2000; American Physical Society; Volume: 85; Issue: 13 Linguagem: Inglês

10.1103/physrevlett.85.2681

1092-0145

I. G. Bearden, H. Bøggild, J. G. Boissevain, P. Christiansen, L. Conin, J. Dodd, B. Erazmus, S. Esumi, C. Fabjan, D. Ferenc, A. Franz, J. J. Gaardhøje, A. G. Hansen, O. Hansen, D. Hardtke, H. Van Hecke, E. B. Holzer, T. J. Humanic, P. Hummel, B. V. Jacak, K. Kaimi, M. Kaneta, T. Kohama, M. Kopytine, M. Leltchouk, A. Ljubičić, B. Lörstad, L. Martin, A. B. Medvedev, M. Murray, H. Ohnìshì, G. Paić, S.U. Pandey, F. Piuz, J. Pluta, V. Polychronakos, M. Potekhin, G. Poulard, D. Reichold, A. Sakaguchi, J. Schmidt-Sørensen, J. Simon-Gillo, W. Sondheim, T. Sugitate, J. P. Sullivan, Y. Sumi, W. Willis, K. Wolf, N. Xu, D. Zachary,

Quantum Chromodynamics and Particle Interactions

The invariant cross section as a function of transverse momentum for antideuterons produced in $158A\mathrm{GeV}/c$ per nucleon $\mathrm{Pb}+\mathrm{Pb}$ central collisions has been measured by the NA44 experiment at CERN. This measurement, together with a measurement of antiprotons, allows for the determination of the antideuteron coalescence parameter. The extracted coalescence radius is found to agree with the deuteron coalescence radius and radii determined from two particle correlations.