Λ0 polarization in 800-GeV/cpp→pf (Λ0K+) -: art. no. 061801

被引:15
|
作者
Félix, J [1 ]
Berisso, MC
Christian, DC
Gara, A
Gottschalk, EE
Gutiérrez, G
Hartouni, EP
Knapp, BC
Kreisler, MN
Lee, S
Markianos, K
Moreno, G
Reyes, MA
Sosa, M
Wang, MHLS
Wehmann, A
Wesson, D
机构
[1] Univ Guanajuato, Guanajuato, Mexico
[2] Univ Massachusetts, Amherst, MA 01003 USA
[3] Fermilab Natl Accelerator Lab, Batavia, IL USA
[4] Columbia Univ, Nevis Lab, New York, NY USA
[5] Lawrence Livermore Natl Lab, Livermore, CA USA
[6] Univ Michoacana, Morelia, Michoacan, Mexico
关键词
D O I
10.1103/PhysRevLett.88.061801
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report results from a study of Lambda(0) polarization in the exclusive reaction pp --> p(f) (Lambda(0)K(+)) at 800-GeV/c. We observe a dependence of the polarization on the Lambda(0)K(+) 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 Lambda(0)K(+) invariant mass suggests that the origin of the polarization is closely related to the production dynamics of the diffractively produced Lambda(0)K(+) system.
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页数:4
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