Spin alignment of [formula omitted] mesons produced in neutron-carbon interactions
A new precise measurements of spin density matrix element ρ 00 of K ∗(892) ± mesons produced inclusively in neutron-carbon interactions at ∼60 GeV have been carried out in the EXCHARM experiment at the Serpukhov accelerator. The values of ρ 00 obtained in the transversity frame are 0.393±0.011(stat)...
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Published in: | Physics letters. B Vol. 485; no. 4; pp. 334 - 340 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Elsevier B.V
01-07-2000
|
Online Access: | Get full text |
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Summary: | A new precise measurements of spin density matrix element
ρ
00 of
K
∗(892)
±
mesons produced inclusively in neutron-carbon interactions at ∼60 GeV have been carried out in the EXCHARM experiment at the Serpukhov accelerator. The values of
ρ
00 obtained in the transversity frame are 0.393±0.011(stat)±0.018(sys) for
K
∗(892)
+
. An upper limit
ρ
00<0.40 at
CL=90% has been obtained for
K
∗(892)
−
. Significant
P
T
dependence of
ρ
00 has been observed in
K
∗(892)
+
production.
The investigation has been carried out at the Laboratory of Particle Physics, JINR. |
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ISSN: | 0370-2693 1873-2445 |
DOI: | 10.1016/S0370-2693(00)00704-8 |