Abstract:
Antiproton (¯p) and antilambda (¯Λ) production has been measured for minimum bias in p+A collisions and central A1+ A2 collisions at the CERN-SPS by the collaborations NA35/49 and NA44. The measurements are extrapolated from rapidity distributions to absolute minimum bias cross sections. It is shown that the ¯p cross sections divided by A1· A2 follow an exponential trend as a function of a characteristic length obtained from a Glauber type absorption model, while the ¯Λ cross sections divided by A1· A2 are constant. The exponential trend also holds for ¯p production at the lower energies of the Brookhaven AGS. A discussion of the physics interpretation of the established trends in terms of an effective absorption cross section is presented.
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Received: 15 July 1999 / Revised version: 10 November 1999
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Gonin, M., Hansen, O. On the Absorption of antibaryons in nuclei . EPJ A 7, 293–298 (2000). https://doi.org/10.1007/s100500050394
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DOI: https://doi.org/10.1007/s100500050394