Lambda and lambda production in central Pb-Pb collisions at 40, 80, and 158A GeV.
Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and 158A GeV beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The Lambda/pi ratio at midrapidity and in full phase space shows a pronounced maximum between the highest BNL Alternating Gradient Synchrotron and 40A GeV CERN Super Proton Synchrotron energies, whereas the Lambda/pi ratio exhibits a monotonic increase.
Rudjer Boskovic Institute, Zagreb, Croatia.
T
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Anticic
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B
Baatar
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D
Barna
J
J
Bartke
M
M
Behler
L
L
Betev
H
H
Białkowska
A
A
Billmeier
C
C
Blume
B
B
Boimska
M
M
Botje
J
J
Bracinik
R
R
Bramm
R
R
Brun
P
P
Buncić
V
V
Cerny
P
P
Christakoglou
O
O
Chvala
J G
JG
Cramer
P
P
Csató
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N
Darmenov
A
A
Dimitrov
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P
Dinkelaker
V
V
Eckardt
P
P
Filip
D
D
Flierl
Z
Z
Fodor
P
P
Foka
P
P
Freund
V
V
Friese
J
J
Gál
M
M
Gaździcki
G
G
Georgopoulos
E
E
Gładysz
S
S
Hegyi
C
C
Höhne
K
K
Kadija
A
A
Karev
V I
VI
Kolesnikov
T
T
Kollegger
E
E
Kornas
R
R
Korus
M
M
Kowalski
I
I
Kraus
M
M
Kreps
M
M
van Leeuwen
P
P
Lévai
L
L
Litov
M
M
Makariev
A I
AI
Malakhov
C
C
Markert
M
M
Mateev
B W
BW
Mayes
G L
GL
Melkumov
C
C
Meurer
A
A
Mischke
M
M
Mitrovski
J
J
Molnár
St
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Mrówczyński
G
G
Pálla
A D
AD
Panagiotou
D
D
Panayotov
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K
Perl
A
A
Petridis
M
M
Pikna
L
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Pinsky
F
F
Pühlhofer
J G
JG
Reid
R
R
Renfordt
W
W
Retyk
C
C
Roland
G
G
Roland
M
M
Rybczyński
A
A
Rybicki
A
A
Sandoval
H
H
Sann
N
N
Schmitz
P
P
Seyboth
F
F
Siklér
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B
Sitar
E
E
Skrzypczak
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Stefanek
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Stock
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Ströbele
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Susa
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Szentpétery
J
J
Sziklai
T A
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Trainor
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D
Varga
M
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Vassiliou
G I
GI
Veres
G
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Vesztergombi
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Vranić
A
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Wetzler
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Włodarczyk
I K
IK
Yoo
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Zaranek
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Zimányi