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
Main Authors: Aleev, A.N., Amaglobeli, N.S., Balandin, V.P., Bugorski, A.P., Cheshkov, C.V., Gaponenko, A.N., Geshkov, I.M., Grigalashvili, T.S., Hristov, P., Ivanchenko, I.M., Ivanchenko, Z.M., Kapishin, M.N., Karpenko, N.N., Kekelidze, V.D., Khristova, T.V., Kojenkova, Z.I., Kopadze, M.V., Kosarev, I.G., Kretov, Yu.A., Kurilin, A.S., Kuz'min, N.A., Kvatadze, R.A., Lavrentyev, A.A., Loktionov, A.A., Lomidze, N.L., Lyubimov, A.L., Madigojin, D.T., Mestvirishvili, A.S., Molokanova, N.A., Morozov, A.N., Panacik, A.A., Ponta, T., Potrebenikov, Yu.K., Preda, T., Skripnichuk, A.G., Slepets, L.A., Spaskov, V.N., Tatishvili, G.T., Tkatchev, A.L., Zinchenko, A.I.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-07-2000
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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.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(00)00704-8