Pion freeze-out time in Pb plus Pb collisions at 158 AGeV/c studied via pi(-)/pi(+) and K-/K+ ratios

Summary, in English

The effect of the final state Coulomb interaction on particles produced in Pb + Pb collisions at 158AGeV/c has been investigated in the WA98 experiment through the study of the pi(-)/pi(+) and K-/K+ ratios measured as a function of T-m- (m)0. While the ratio for kaons shows no significant T-m dependence, the pi(-)/pi(+) ratio is enhanced at small T-m - (m)0 values with an enhancement that increases with centrality. A silicon pad detector located near the target is used to estimate the contribution of hyperon decays to the pi(-)/pi(+) ratio. The comparison of results with predictions of the RQMD model in which the Coulomb interaction has been incorporated allows to place constraints on the time of the pion freeze-out.

• Author: M. M. Aggarwal; Z. Ahammed; A. L. S. Angelis; V. Antonenko; V. Arefiev; V. Astakhov; V. Avdeitchikov; T. C. Awes; P. V. K. S. Baba; S. K. Badyal; S. Bathe; B. Batiounia; T. Bernier; K. B. Bhalla; V. S. Bhatia; C. Blume; D. Bucher; H. Buesching; Lars Carlén; S. Chattopadhyay; M. P. Decowski; H. Delagrange; P. Donni; M. R. Dutta Majumdar; K. El Chenawi; A. K. Dubey; K. Enosawa; S. Fokin; V. Frolov; M. S. Ganti; Sten Garpman; O. Gavrishchuk; F. J. M. Geurts; T. K. Ghosh; R. Glasow; B. Guskov; Hans-Åke Gustafsson; H. H. Gutbrod; I. Hrivnacova; M. Ippolitov; H. Kalechofsky; R. Kamermans; K. Karadjev; K. Karpio; B. W. Kolb; I. Kosarev; I. Koutcheryaev; A. Kugler; P. Kulinich; M. Kurata; A. Lebedev; H. Lohner; L. Luquin; D. P. Mahapatra; V. Manko; M. Martin; G. Martinez; A. Maximov; Y. Miake; G. C. Mishra; B. Mohanty; M.-J. Mora; D. Morrison; T. Mukhanova; D. S. Mukhopadhyay; H. Naef; B. K. Nandi; S. K. Nayak; T. K. Nayak; A. Nianine; V. Nikitine; S. Nikolaev; Pål Nilsson; S. Nishimura; P. Nomokonov; Joakim Nystrand; Anders Oskarsson; Ingvar Otterlund; S. Pavliouk; T. Peitzmann; D. Peressounko; V. Petracek; S. C. Phatak; W. Pinganaud; F. Plasil; M. L. Purschke; J. Rak; R. Raniwala; S. Raniwala; N. K. Rao; F. Retiere; K. Reygers; G. Roland; L. Rosselet; I. Roufanov; C. Roy; J. M. Rubio; S. S. Sambyal; R. Santo; S. Sato; H. Schlagheck; H.-R. Schmidt; Y. Schutz; G. Shabratova; T. H. Shah; I. Sibiriak; T. Siemiarczuk; David Silvermyr; B. C. Sinha; N. Slavine; Kaj Söderström; G. Sood; S. P. Sorensen; P. Stankus; G. Stefanek; P. Steinberg; Evert Stenlund; M. Sumbera; Tomas Svensson; A. Tsvetkov; L. Tykarski; E. C. v. d. Pijll; N. V. Eijndhoven; G. J. v. Nieuwenhuizen; A. Vinogradov; Y. P. Viyogi; A. Vodopianov; S. Voeroes; B. Wyslouch; G. R. Young
• Department/s: Department of Physics; Particle and nuclear physics
• Publishing year: 2006
• Language: English
• Pages: 343-352
• Publication/Series: European Physical Journal C. Particles and Fields
• Volume: 48
• Issue: 2
• Links: http://dx.doi.org/10.1140/epjc/s10052-006-0081-x
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044