Abstract
Enhanced yields of lambdas and other strange hadrons in experiments on nuclear targets at incident energies of 200 GeV have been recently reported by several experimental groups. We calculated events for proton projectiles on different targets in the framework of the relativistic quantum molecular dynamics approach which is based on string excitation and fragmentation with subsequent hadronic collisions. Here we address the question whether the experimentally found lambda enhancement in hadron-nucleus collisions can be understood by interactions of secondary hadrons formed in the target nucleus. Our results for Λ's, kaons and\(\bar \Lambda 's\) agree well with the experimental measurements. We find a doubling of lambda production in the target fragmentation region forp collisions on heavy targets due to nuclear cascading of the produced mesons. Resonances play an important role in creating strange quark pairs confirming earlier findings of their outstanding role inAA collisions.
Similar content being viewed by others
References
P. Koch, J. Rafelski, B. Müller: Phys. Rep. 142 (1986) 167
H. Sorge, M. Berenguer, H. Stöcker, W. Greiner: LA-UR-92-1078 (preprint), subm. to Phys. Lett. B
R. Mattiello et al.: Nucl. Phys. 24B (Proc. Suppl.) (1991) 221
J. Bartke et al., NA35 Coll.: Z. Phys. C48 (1990) 191; R. Stock et al., NA35 Coll.: Nucl. Phys. A525 221c
S. Abatzis et al., WA85 Coll.: Phys. Lett. B244 (1990) 130; Phys. Lett. B259 (1990) 508; Phys. Lett. B270 (1991) 123
J. Rafelski: Phys. Lett. B262 (1991) 333; H.C. Eggers, J. Rafelski: Int. J. Mod. Phys. 6 (1991) 1067
J. Aichelin, K. Werner: HD-TVP-91-18
J. Schaffner: Z. Phys. A341 (1991) 47
A. Bamberger et al., NA35 Coll.: Z. Phys. C43 (1989) 25
I. Derado et al., NA5 Coll.: Z. Phys. C50 (1991) 31
D.H. Brick et al., E565/570 Coll.: PHys. Rev. D45 (1992) 734
B. Jacak et al., HELIOS Coll.: CERN preprint-PPE 92-130 (1992), submitted to Phys. Lett. B
N.N. Nikolaev: Z. Phys. C44 (1989) 645
T. Abbott et al., E802 Coll.: Phys. Rev. Lett. 66 (1991) 1567
H. Sorge, R. Mattiello, H. Stöcker, W. Greiner: Phys. Lett. B271 (1991) 37; Phys. Rev. Lett. 63 (1989) 1459
K. Werner, J. Aichelin: HD-TVP-91-15
See for a recent discussion: W.M. Geist: Nucl. Phys. A525 (1991) 149c
A. Klar, J. Hüfner: Phys. Rev. D31 (1985) 491
H. Sorge et al.: Z. Phys. C47 (1990) 629
R. Schmidt et al., WA80 Coll.: Contribution to the Proceedings of the 9th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions “Quark Matter '91”, to appear in Nucl. Phys. A
B. Nilsson-Almqvist, E. Stenlund: Comput. Phys. Commun. 43 (1987) 387
X. Artru: Phys. Rep. 97 (1983) 147
P.D.B. Collins, A.D. Martin: Hadron interactions. Bristol: Hilger 1984
T. Sjöstrand: Comput. Phys. Commun. 39 (1986) 347
A. Shor, R. Longacre: Phys. Lett. B218 (1989) 100
V.D. Toneev, A.S. Amelin, K.K. Gudima: GSI-89-52 (unpublished); A.S. Amelin, K.K. Gudima, S. Yu. Sivoklokov, V.D. Toneev: Sov. J. Nucl. Phys. 52 (1990) 172
A. Capella et al.: Z. Phys. C33 (1987) 541
K. Werner, J. Hüfner, M. Kutschera, O. Nachtmann: Z. Phys. C37 (1987) 57
J. Ranft: Phys. Rev. D37 (1988) 1842
M. Aguilar-Benitez et al., LEBC-EHS Coll.: Z. Phys. C50 (1991) 405
A. Donnachie: Z. Phys. C4 (1980) 161
J. Whitmore: Phys. Rep. 5 (1974) 273
H. Sorge, H. Stöcker, W. Greiner: Nucl. Phys. A498 (1989) 567c
J. Schwinger: Phys. Rev. 82 (1951) 664; E. Brezin, C. Itzykson: Phys. Rev. D2 (1970) 1191
A. Casher, H. Neuberger, S. Nussinov: Phys. Rev. D20 (1979) 179
See for a description of AGK cutting rules: M. Baker, K. A. Ter-Martirosyan: Phys. Rep. 28 (1976) 1; F.W. Bopp, P. Aurenche: Z. Phys. C13 (1982) 205
C. De Marzo et al.: Phys. Rev. D26 (1982) 1019
K. Goulianos: Phys. Rep. 101 (1983) 169
Particle Data Group: Phys. Lett. B239 (1990) 1
H. Sorge et al.: Nucl. Phys. A525 (1991) 95c
M. Herrmann, J. Knoll: Phys. Lett. B234 (1990) 437
M. Gazdzicki, O. Hansen: Nucl. Phys. A525 (1991) 754
G. Charlton et al.: Phys. Rev. Lett. 30 (1973) 574
N. Baldini, V. Flaminio, W.G. Moorhead, D.R.O. Morrison: Total cross-sections for reactions of high energy particles. Berlin, Heidelberg, New York: Springer 1988
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sorge, H., Winckelmann, L.A., Stöcker, H. et al. Strange particle production in proton-nucleus reactions at ultrarelativistic energies. Z. Phys. C - Particles and Fields 59, 85–97 (1993). https://doi.org/10.1007/BF01555842
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01555842