Lambda(0) polarization in 800-GeV/cpp --> p(f)(Lambda0K+).
We report results from a study of Lambda(0) polarization in the exclusive reaction pp --> p(f)(Lambda0K+) at 800-GeV/c. We observe a dependence of the polarization on the Lambda0K+ invariant mass with large (+71%) positive polarization at small mass (1.63-GeV/c(2)) and large (-43%) negative polarization at large mass (2.75-GeV/c(2)). This observation confirms the result of the CERN ISR R608 experiment and extends the range over which the effect is observed. The strong dependence of the polarization on the Lambda0K+ invariant mass suggests that the origin of the polarization is closely related to the production dynamics of the diffractively produced Lambda0K+ system.
Félix
J
J
Universidad de Guanajuato, León, Guanajuato, México.
Berisso
M C
MC
Christian
D C
DC
Gara
A
A
Gottschalk
E E
EE
Gutiérrez
G
G
Hartouni
E P
EP
Knapp
B C
BC
Kreisler
M N
MN
Lee
S
S
Markianos
K
K
Moreno
G
G
Reyes
M A
MA
Sosa
M
M
Wang
M H L S
MH
Wehmann
A
A
Wesson
D
D