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David Silvermyr

David Silvermyr

Senior lecturer

David Silvermyr

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

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

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.

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

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044