Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry
- Aggarwal, M M
- Agnihotri, A
- Ahammed, Z
- Angelis, A L S
- Antonenko, V
- Arefiev, V
- Astakhov, V
- Avdeitchikov, V
- Awes, T C
- Baba, PVKS
- Badyal, SK
- Barlag, C
- Bathe, S
- Batiounia, B
- Bernier, T
- Bhalla, KB
- Bhatia, VS
- Blume, C
- Bock, R
- Bohne, EM
- Borocz, Z
- Bucher, D
- Buijs, A
- Busching, H
- Carlen, L
- Chalyshev, V
- Chattopadhyay, S
- Cherbatchev, R
- Chujo, T
- Claussen, A
- Das, AC
- Decowski, MP
- Delagrange, H
- Djordjadze, V
- Donni, P
- Doubovik, I
- Dutt, S
- Majumdar, MRD
- El Chenawi, K
- Eliseev, S
- Enosawa, K
- Foka, P
- Fokin, S
- Ganti, MS
- Garpman, S
- Gavrishchuk, O
- Geurts, FJM
- Ghosh, TK
- Glasow, R
- Löhner, H.
DOIAbstract
Two-particle correlations have been measured for identified pi(-) from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k(gamma) is presented, including a full correction for the resolution effects of the apparatus. The cross term R-out-long(2) of the standard fit in the Longitudinally CoMoving System (LCMS) and the upsilon(L) parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion.The shapes of the correlation functions in Q(inv) and Q(space) = root have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequenc...
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