Expansion dynamics of Pb–Pb collisions at 40 A GeV/c viewed by negatively charged hadrons

<B>NA57 Collaboration</B>; F Antinori; P Bacon; A Badalà; R Barbera; A Belogianni; I J Bloodworth; M Bombara; G E Bruno; S A Bull; R Caliandro; M Campbell; W Carena; N Carrer; R F Clarke; A Dainese; D Di Bari; S Di Liberto; R Divià; D Elia; D Evans; G A Feofilov; R A Fini; P Ganoti; B Ghidini; G Grella; H Helstrup; K F Hetland; A K Holme; A Jacholkowski; G T Jones; P Jovanovic; A Jusko; R Kamermans; J B Kinson; K Knudson; V Kondratiev; I Králik; A Kravčáková; P Kuijer; V Lenti; R Lietava; G Løvhøiden; V Manzari; M A Mazzoni; F Meddi; A Michalon; M Morando; P I Norman; A Palmeri; G S Pappalardo; B Pastirčák; R J Platt; E Quercigh; F Riggi; D Röhrich; G Romano; R Romita; K Šafařík; L Šándor; E Schillings; G Segato; M Sené; R Sené; W Snoeys; F Soramel; M Spyropoulou-Stassinaki; P Staroba; R Turrisi; T S Tveter; J Urbán; P van de Ven; P Vande Vyvre; A Vascotto; T Vik; O Villalobos Baillie; L Vinogradov; T Virgili; M F Votruba; J Vrláková; P Závada

doi:10.1088/0954-3899/34/3/001

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Journal of Physics G: Nuclear and Particle Physics

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NA57 Collaboration et al 2007 J. Phys. G: Nucl. Part. Phys. 34 403 doi:10.1088/0954-3899/34/3/001

Expansion dynamics of Pb–Pb collisions at 40 A GeV/c viewed by negatively charged hadrons

NA57 Collaboration, F Antinori¹, P Bacon², A Badalà³, R Barbera³, A Belogianni⁴, I J Bloodworth², M Bombara⁵, G E Bruno⁶, S A Bull², R Caliandro⁶, M Campbell⁷, W Carena⁷, N Carrer⁷, R F Clarke², A Dainese^1,19, D Di Bari⁶, S Di Liberto⁸, R Divià⁷, D Elia⁶, D Evans², G A Feofilov⁹, R A Fini⁶, P Ganoti⁴, B Ghidini⁶, G Grella¹⁰, H Helstrup¹¹, K F Hetland¹¹, A K Holme¹², A Jacholkowski³, G T Jones², P Jovanovic², A Jusko², R Kamermans¹³, J B Kinson², K Knudson⁷, V Kondratiev⁹, I Králik⁵, A Kravčáková¹⁴, P Kuijer¹³, V Lenti⁶, R Lietava², G Løvhøiden¹², V Manzari⁶, M A Mazzoni⁸, F Meddi⁸, A Michalon¹⁵, M Morando¹, P I Norman², A Palmeri³, G S Pappalardo³, B Pastirčák⁵, R J Platt², E Quercigh¹, F Riggi³, D Röhrich¹⁶, G Romano¹⁰, R Romita⁶, K Šafařík⁷, L Šándor⁵, E Schillings¹³, G Segato¹, M Sené¹⁷, R Sené¹⁷, W Snoeys⁷, F Soramel^1,20, M Spyropoulou-Stassinaki⁴, P Staroba¹⁸, R Turrisi¹, T S Tveter¹², J Urbán¹⁴, P van de Ven¹³, P Vande Vyvre⁷, A Vascotto⁷, T Vik¹², O Villalobos Baillie², L Vinogradov⁹, T Virgili¹⁰, M F Votruba², J Vrláková¹⁴ and P Závada¹⁸

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Giuseppe.Bruno@ba.infn.it

¹ University of Padua and INFN, Padua, Italy
² University of Birmingham, Birmingham, UK
³ University of Catania and INFN, Catania, Italy
⁴ Physics Department, University of Athens, Athens, Greece
⁵ Institute of Experimental Physics, Slovak Academy of Science, Košice, Slovakia
⁶ Dipartimento IA di Fisica dell'Universitàe del Politecnico di Bari and INFN, Bari, Italy
⁷ CERN, European Laboratory for Particle Physics, Geneva, Switzerland
⁸ University 'La Sapienza' and INFN, Rome, Italy
⁹ State University of St. Petersburg, St. Petersburg, Russia
¹⁰ Dipartimento di Scienze Fisiche 'E.R. Caianiello' dell'Università and INFN, Salerno, Italy
¹¹ Høgskolen i Bergen, Bergen, Norway
¹² Fysisk Institutt, Universitetet i Oslo, Oslo, Norway
¹³ Utrecht University and NIKHEF, Utrecht, The Netherlands
¹⁴ P J Šafárik University, Košice, Slovakia
¹⁵ IReS/ULP, Strasbourg, France
¹⁶ Fysisk Institutt, Universitetet i Bergen, Bergen, Norway
¹⁷ Collège de France, Paris, France
¹⁸ Institute of Physics, Prague, Czech Republic
¹⁹ Present address:Laboratori Nazionali di Legnaro, Legnaro, Italy>
²⁰ Permanent address:University of Udine, Udine, Italy

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Abstract References Cited By

In this paper, we present results on transverse mass spectra and Hanbury–Brown and Twiss correlation functions of negatively charged hadrons, which are expected to be mostly π⁻, measured in Pb–Pb collisions at 40 A GeV/c beam momentum. Based on these data, the collision dynamics and the spacetime extent of the system at the thermal freeze-out are studied over a centrality range corresponding to the most central 53% of the Pb–Pb inelastic cross-section. Comparisons with freeze-out conditions of strange particles and HBT results from other experiments are discussed.

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Expansion dynamics of Pb–Pb collisions at 40 A GeV/c viewed by negatively charged hadrons

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