Abstract
The relativistic meson field theory is used to study the effects of the in-medium interaction on the predicted antibaryon abundancy in hot hadronic matter. It is demonstrated that subtreshold production of antiprotons in high energy heavy ion collisions at Elab =1–2 GeV/nucleon is enhanced by 2–3 orders of magnitude as compared to a standard fireball model estimate. Furthermore, we show that after the inclusion of interactions the anti-hyperon yields, e.g.\(\bar \Lambda \)/π − are enhanced by about a factor ten. Predicted yields are in excess of the data measured by the NA35 and WA85 collaborations at CERN. The annihilation of antibaryons in surrounding matter at the final stage of the reaction may essentially reduce their abundancy.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Serot, B.D., Walecka, J.D.: Adv. Nucl. Phys., vol. 16, Negele, J.W., Vogt, E. (eds.). New York: Plenum Press 1985
Reinhard, P.-G.: Rep. Prog. Phys.52, 439 (1989)
Theis, J., Graebner, G., Buchwald, G., Maruhn, J., Greiner, W., Stöcker, H., Polonyi, J.: Phys. Rev. D28, 2286 (1983)
Shor, A. et al.: Phys. Rev. Lett.62, 1829 (1989); ibid.63, 2192 (1989)
Costales, J., E802 collaboration: Talk presented at the Workshop on Heavy Ion Physics at AGS (BNL, Upton, March 1990)
Abbott, T., E802 collaboration: Phys. Rev. Lett.64, 847 (1990)
Bendermann, I., Kienle, P., König, W., Ströher, H.: Subtreshold¯p production, GSI experimental proposal S039
Bartke, J., NA35 collaboration: Z. Phys. C — Particles and Fields48, 191 (1990)
Evans, D., WA85 collaboration: Phys. A525, 441c (1991) Quercigh, E.: Private communication
Koch, P., Müller, B., Rafelski, J.: Phys. Rep.142, 167 (1986)
Mishustin, I.N.: Yad. Fiz. [Sov. J. Nucl. Phys.]52, 1135 (1990)
Mishustin, I.N., Satarov, L.M., Schaffner, J., Stöcker, H., Greiner, W.: Proc. of the Int. Conf. on Heavy Ion Physics, Dubna 1990. Singapore: World Scientific 1991 Mishustin, I.N., Satarov, L.M., Schaffner, J., Stöcker, H., Greiner, W.: (submitted to Phys. Rev. D)
Boguta, J., Bodmer, A.R.: Nucl. Phys. A292, 414 (1977)
Boguta, J., Stöcker, H.: Phys. Lett. B120, 289 (1983)
Shapiro, I.S.: Phys. Rep.35, 129 (1978)
Auerbach, N., Goldhaber, A.S., Miller, L.D.: Phys. Lett. B182, 221 (1986)
Rufa, M., Stöcker, H., Maruhn, J., Reinhard, P.-G., Greiner, W.: J. Phys. G13, 143 (1987); Rufa, M.: Doctoral Thesis, GSI-Report 89-19
Rufa, M., Schaffner, J., Maruhn, J.A., Stöcker, H., Greiner, W., Reinhard, P.-G.: Phys. Rev. C42, 2469 (1990)
Stöcker, H., Greiner, W., Scheid, W.: Z. Phys. A — Atoms and Nuclei286, 121 (1978) demonstrated that lowering the effective mass increases the yield of particle production and that the yield depends on the equation of state !
Stöcker, H., Gyulassy, M., Boguta, J.: Phys. Lett. B103, 269 (1981)
Stöcker, H., Greiner, W.: Phys. Rep.137, 277 (1986)
Waldhauser, B.M., Maruhn, J.A., Stöcker, H., Greiner, W.: Z. Phys. A — Atomic Nuclei328, 19 (1987)
Glendenning, N.K.: Phys. Rev. C37, 1442 (1988)
Schönhofen, M.S., Cubero, M., Gering, M., Sambataro, M., Feldmeier, H., Nörenberg, W.: Nucl. Phys. A504, 875 (1989)
Mattiello, R., Sorge, H., Stöcker, H., Greiner, W.: Phys. Rev. Lett.14, 1459 (1989)
Heinz, U., Subramanian, P.R., Stöcker, H., Greiner, W.: J. Phys. G12, 1237 (1986)
Dover, C.B.: Talk presented at the Workshop on Heavy Ion Physics at the AGS (BNL, Upton, March 1990); Crawford, H.: Private Communication; Braun-Munzinger, P.: Private Communication
Crawford, H. et al.: Search for new particles and investigation of hadronization in nucleus-nucleus collision at the AGS, AGS proposal, 1990; Sandweiss, J. et al.: Production of rare composite objects in relativistic heavy ion collisions, Proposal 864, 1990
Author information
Authors and Affiliations
Additional information
Dedicated to Prof. Dr. P. Kienle on the occasion of his 60th birthday
The authors thank A. Schäfer and P.-G. Reinhard for fruitful discussions as well as B. Friman, H. Feldmeyer and H. Sorge for useful remarks. The authors are grateful to the referee for the proposed recipe of estimating the effect of the final state annihilation. One of us (H.S.) likes to thank J. Boguta for stimulating discussions concerning the RMF model and its critical phenomenon. Two of us (I.N.M. and L.M.S.) are grateful to the Institut für Theoretische Physik der J.W. Goethe Universität for kind hospitality and financial support. This work was supported by the Gesellschaft für Schwerionenforschung Darmstadt m.b.H. (GSI), the Bundesministerium für Forschung und Technologie (BMFT), and the Deutsche Forschungsgemeinschaft (DFG).
Rights and permissions
About this article
Cite this article
Schaffner, J., Mishustin, I.N., Satarov, L.M. et al. Antibaryon\(\left( {\bar p,\bar \Lambda } \right)\) production in relativistic nuclear collisions. Z. Physik A - Hadrons and Nuclei 341, 47–52 (1991). https://doi.org/10.1007/BF01281273
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01281273