Aggarwal, M. M. ; Ahammed, Z. ; Angelis, A. L. S. ; Antonenko, V. ; Arefiev, V. ; Astakhov, V. ; Avdeitchikov, V. ; Awes, T. C. ; Baba, P. V. K. S. ; Badyal, S. K. ; Sinhsa, B. C. ; et., al (2006) Pion freeze-out time in Pb+Pb collisions at 158 AGeV/c studied via π−/π+ and K−/K+ ratios The European Physical Journal C - Particles and Fields, 48 (2). pp. 343-352. ISSN 1434-6044
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Official URL: http://www.springerlink.com/content/v0mq235817k1m0...
Related URL: http://dx.doi.org/10.1140/epjc/s10052-006-0081-x
Abstract
The effect of the final state Coulomb interaction on particles produced in Pb+Pb collisions at 158 AGeV/c has been investigated in the WA98 experiment through the study of the π−/π+ and K−/K+ ratios measured as a function of mT-m0. While the ratio for kaons shows no significant mT dependence, the π−/π+ ratio is enhanced at small mT-m0 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 π−/π+ 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer. |
| ID Code: | 70348 |
| Deposited On: | 21 Nov 2011 09:00 |
| Last Modified: | 21 Nov 2011 09:00 |
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