Central Pb+Pb Collisions at 158 A GeV/c Studied by Pion-Pion
  Interferometry

Aggarwal, M.M.; Agnihotri, A.; 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.; Baldine, A.; Barabach, L.; Barlag, C.; Bathe, S.; Batiounia, B.; Bernier, T.; Bhalla, K.B.; Bhatia, V.S.; Blume, C.; Bock, R.; Bohne, E.M.; Borocz, Z.; Bucher, D.; Buijs, A.; Busching, H.; Carlen, L.; Chalyshev, V.; Chattopadhyay, S.; Cherbatchev, R.; Chujo, T.; Claussen, A.; Das, A.C.; Decowski, M.P.; Delagrange, H.; Djordjadze, V.; Donni, P.; Doubovik, I.; Dutt, S.; Dutta-Majumdar, MR.; El Chenawi, K.; Eliseev, S.; Enosawa, K.; Foka, P.; Fokin, S.; Frolov, V.; Ganti, M.S.; Garpman, S.; Gavrishchuk, O.; Geurts, F.J.M.; Ghosh, T.K.; Glasow, R.; Gupta, S.K.; Guskov, B.; Gustafsson, H.A.; Gutbrod, H.H.; Higuchi, R.; Hrivnacova, I.; Ippolitov, M.; Kalechofsky, H.; Kamermans, R.; Kampert, K.H.; Karadjev, K.; Karpio, K.; Kato, S.; Kees, S.; Kolb, B.W.; Kosarev, I.; Koutcheryaev, I.; Krumpel, T.; Kugler, A.; Kulinich, P.; Kurata, M.; Kurita, K.; Kuzmin, N.; Langbein, I.; Lebedev, A.,; Lee, Y.Y.; Lohner, H.; Luquin, L.; Mahapatra, D.P.; Manko, V.; Martin, M.; Martinez Garcia, Gines; Maximov, A.; Mehdiyev, R.; Mgebrichvili, G.; Miake, Y.; Mikhalev, D.; Mir, M.F.; Mishra, G.C.; Miyamoto, Y.; Mohanty, B.; Morrison, D.; Mukhopadhyay, D.S.; Myalkovski, V.; Naef, H.; Nandi, B.K.; Nayak, S.K.; Nayak, T.K.; Neumaier, S.; Nianine, A.; Nikitine, V.; Nikolaev, S.; Nilsson, P.; Nishimura, S.; Nomokonov, P.; Nystrand, J.; Obenshain, F.E.; Oskarsson, A.; Otterlund, I.; Pachr, M.; Parfenov, A.; Pavliouk, S.; Peitzmann, T.; Petracek, V.; Pinganaud, W.; Plasil, F.; Purschke, M.L.; Rak, J.; Ramamurthy, V.S.; Raniwala, R.; Raniwala, S.; Rao, N.K.; Retiere, F.; Reygers, K.; Roland, G.; Rosselet, L.; Roufanov, I.; Roy, C.; Rubio, J.M.; Sako, H.; Sambyal, S.S.; Santo, R.; Sato, S.; Schlagheck, H.; Schmidt, H.R.; Schutz, Y.; Shabratova, G.; Shah, T.H.; Sibiriak, I.; Siemiarczuk, T.; Silvermyr, D.; Sinha, B.C.; Slavine, N.; Soderstrom, K.; Solomey, N.; Sorensen, S.P.; Stankus, P.; Stefanek, G.; Steinberg, P.; Stenlund, E.; Stuken, D.; Sumbera, M.; Svensson, T.; Trivedi, M.D.; Tsvetkov, A.; Tykarski, L.; Urbahn, J.; Van Der Pijll, E.C.; Van Eijndhoven, N.; Van Nieuwenhuizen, G.J.; Vinogradov, A.; Viyogi, Y.P.; Vodopianov, A.; Voros, S.; Wyslouch, B.; Yagi, K.; Yokota, Y.; Young, G.R.

research

Central Pb+Pb Collisions at 158 A GeV/c Studied by Pion-Pion Interferometry

Authors: M.M. Aggarwal
A. Agnihotri
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
A. Baldine
L. Barabach
C. Barlag
S. Bathe
B. Batiounia
T. Bernier
K.B. Bhalla
V.S. Bhatia
C. Blume
R. Bock
E.M. Bohne
Z. Borocz
D. Bucher
A. Buijs
H. Busching
L. Carlen
V. Chalyshev
S. Chattopadhyay
R. Cherbatchev
T. Chujo
A. Claussen
A.C. Das
M.P. Decowski
H. Delagrange
V. Djordjadze
P. Donni
I. Doubovik
S. Dutt
MR. Dutta-Majumdar
K. El Chenawi
S. Eliseev
K. Enosawa
P. Foka
S. Fokin
V. Frolov
M.S. Ganti
S. Garpman
O. Gavrishchuk
F.J.M. Geurts
T.K. Ghosh
R. Glasow
S.K. Gupta
B. Guskov
H.A. Gustafsson
H.H. Gutbrod
R. Higuchi
I. Hrivnacova
M. Ippolitov
H. Kalechofsky
R. Kamermans
K.H. Kampert
K. Karadjev
K. Karpio
S. Kato
S. Kees
B.W. Kolb
I. Kosarev
I. Koutcheryaev
T. Krumpel
A. Kugler
P. Kulinich
M. Kurata
K. Kurita
N. Kuzmin
I. Langbein
A., Lebedev
Y.Y. Lee
H. Lohner
L. Luquin
D.P. Mahapatra
V. Manko
M. Martin
Gines Martinez Garcia
A. Maximov
R. Mehdiyev
G. Mgebrichvili
Y. Miake
D. Mikhalev
M.F. Mir
G.C. Mishra
Y. Miyamoto
B. Mohanty
D. Morrison
D.S. Mukhopadhyay
V. Myalkovski
H. Naef
B.K. Nandi
S.K. Nayak
T.K. Nayak
S. Neumaier
A. Nianine
V. Nikitine
S. Nikolaev
P. Nilsson
S. Nishimura
P. Nomokonov
J. Nystrand
F.E. Obenshain
A. Oskarsson
I. Otterlund
M. Pachr
A. Parfenov
S. Pavliouk
T. Peitzmann
V. Petracek
W. Pinganaud
F. Plasil
M.L. Purschke
J. Rak
V.S. Ramamurthy
R. Raniwala
S. Raniwala
N.K. Rao
F. Retiere
K. Reygers
G. Roland
L. Rosselet
I. Roufanov
C. Roy
J.M. Rubio
H. Sako
S.S. Sambyal
R. Santo
S. Sato
H. Schlagheck
H.R. Schmidt
Y. Schutz
G. Shabratova
T.H. Shah
I. Sibiriak
T. Siemiarczuk
D. Silvermyr
B.C. Sinha
N. Slavine
K. Soderstrom
N. Solomey
S.P. Sorensen
P. Stankus
G. Stefanek
P. Steinberg
E. Stenlund
D. Stuken
M. Sumbera
T. Svensson
M.D. Trivedi
A. Tsvetkov
L. Tykarski
J. Urbahn
E.C. Van Der Pijll
N. Van Eijndhoven
G.J. Van Nieuwenhuizen
A. Vinogradov
Y.P. Viyogi
A. Vodopianov
S. Voros
B. Wyslouch
K. Yagi
Y. Yokota
G.R. Young
Publication date: 1 January 2000
Publisher: 'Springer Science and Business Media LLC'
Doi

Abstract

Two-particle correlations have been measured for identified negative pions from central 158 AGeV 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 kT is presented, including a full correction for the resolution effects of the apparatus. The cross term Rout-long of the standard fit in the Longitudinally CoMoving System (LCMS) and the vl 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 Qinv and Qspace have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.Comment: 13 pages including 10 figure