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Hyperon production at the CERN SPS: results from the NA57 experiment

L Šándor (for the NA57 Collaboration), F Antinori1, P A Bacon2, A Badalà3, R Barbera3, A Belogianni4, A Bhasin2, I J Bloodworth2, M Bombara5, G E Bruno6, S A Bull2, R Caliandro6, M Campbell7, W Carena7, N Carrer7, R F Clarke2, A Dainese1, A P de Haas8, P de Rijke8, D Di Bari6, S Di Liberto9, R Divia7, D Elia6, D Evans2, K Fanebust10, F Fayazzadeh11, G A Feofilov12, R A Fini6, P Ganoti4, B Ghidini6, G Grella13, H Helstrup10, M Henriquez11, A K Holme11, A Jacholkowski6, G T Jones2, P Jovanovic2, A Jusko5, R Kamermans8, J B Kinson2, K Knudson7, A A Kolozhvari12, V Kondratiev12, I Králik5, A Kravčáková14, P Kuijer8, V Lenti6, R Lietava2, G Løvhøiden11, V Manzari6, G Martinská14, M A Mazzoni9, F Meddi9, A Michalon15, M Morando1, E Nappi6, F Navach6, P I Norman2, A Palmeri3, G S Pappalardo3, B Pastirčák5, J Pišút16, N Pišútová16, F Posa6, E Quercigh1, F Riggi3, D Röhrich17, G Romano13, K šafařík7, L šándor5,7, E Schillings8, G Segato1, M Sené18, R Sené18, W Snoeys7, F Soramel1, M Spyropoulou-Stassinaki4, P Staroba19, T A Toulina12, R Turrisi1, T S Tveter11, J Urbán14, F F Valiev12, A van den Brink8, P van de Ven8, P Vande Vyvre7, N van Eijndhoven8, J van Hunen7, A Vascotto7, T Vik11, O Villalobos Baillie2, L Vinogradov12, T Virgili13, M F Votruba2, J Vrláková14 and P Závada19

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New results on strange baryon and antibaryon production in Pb–Pb collisions at 40 and 160 GeV per nucleon are presented. In particular, we have increased significantly the statistics of the Ξ and \overline{\Xi}^{\,+} samples at 160 GeV per nucleon. The dependence of particle yields and spectra on collision centrality and energy of interaction is analysed.


PACS

25.75.Dw Particle and resonance production

14.20.Jn Hyperons

27.80.+w 190(less-than-or-equal-to)A(less-than-or-equal-to)219

Subjects

Nuclear physics

Particle physics and field theory

Dates

Issue 1 (January 2004)

Received 27 May 2003

Published 11 December 2003



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