Central Pb plus Pb collisions at 158 A GeV/c studied by pi(-)pi(-) interferometry

Authors
Aggarwal, MM Agnihotri, A Ahammed, Z Angelis, ALS Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, V Awes, TC 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 Gupta, SK Guskov, B Gustafsson, HA Gutbrod, HH Higuchi, R Hrivnacova, I Ippolitov, M Kalechofsky, H Kamermans, R Kampert, KH Karadjev, K Karpio, K Kato, S Kees, S Klein-Bosing, C Knoche, S Kolb, BW Kosarev, I Koutcheryaev, I Krumpel, T Kugler, A Kulinich, P Kurata, M Kurita, K Kuzmin, N Langbein, I Lebedev, A Lee, YY Lohner, H Luquin, L Mahapatra, DP Manko, V Martin, M Martinez, G Maximov, A Mgebrichvili, G Miake, Y Mir, MF Mishra, GC Miyamoto, Y Mohanty, B Morrison, D Mukhopadhyay, DS Naef, H Nandi, BK Nayak, SK Nayak, TK Neumaier, S Nianine, A Nikitine, V Nikolaev, S Nilsson, P Nishimura, S Nomokonov, P Nystrand, J Obenshain, FE Oskarsson, A Otterlund, I Pachr, M Pavliouk, S Peitzmann, T Petracek, V Pinganaud, W Plasil, F von Poblotzki, U Purschke, ML Rak, J Raniwala, R Raniwala, S Ramamurthy, VS Rao, NK Retiere, F Reygers, K Roland, G Rosselet, L Roufanov, I Roy, C Rubio, JM Sako, H Sambyal, SS Santo, R Sato, S Schlagheck, H Schmidt, HR Schutz, Y Shabratova, G Shah, TH Sibiriak, I Siemiarczuk, T Silvermyr, D Sinha, BC Slavine, N Soderstrom, K Solomey, N Sorensen, SP Stankus, P Stefanek, G Steinberg, P Stenlund, E Stuken, D Sumbera, M Svensson, T Trivedi, MD Tsvetkov, A Tykarski, L Urbahn, J vander Pijll, EC von Eijndhoven, N von Nieuwenhuizen, GJ Vinogradov, A Viyogi, YP Vodopianov, A Voros, S Wyslouch, B Yagi, K Yokota, Y Young, GR
Citation
Mm. Aggarwal et al., Central Pb plus Pb collisions at 158 A GeV/c studied by pi(-)pi(-) interferometry, EUR PHY J C, 16(3), 2000, pp. 445-451
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
16
Issue
3
Year of publication
2000
Pages
445 - 451
Database
ISI
SICI code
1434-6044(200009)16:3<445:CPPPCA>2.0.ZU;2-8
Abstract
Two-particle correlations have been measured for identified pi(-) from cent ral 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimens ions have been obtained. A multi-dimensional study of the radii as a functi on 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 t he source undergoes a boost invariant expansion. The shapes of the correlation functions in Q(inv) and Q(space) = root<(Q(x) (2) + Q(y)(2) + Q(z)(2))over bar> have been analyzed in detail. They are no t Gaussian but better represented by exponentials. As a consequence, fittin g Gaussians to these correlation functions may produce different radii depe nding on the acceptance of the experimental setup used for the measurement.