Spin density matrix of the ... in the reaction ...: Crystal Barrel Collaboration

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).The spin density matrix of the ... has been determined for the reaction ... with unpolarized in-flight data measured by the Crystal Barrel LEAR experiment at CERN. The two main decay modes of the ... into ... and ... have be...

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Published inThe European physical journal. C, Particles and fields Vol. 75; no. 3; pp. 1 - 13
Main Authors Amsler, C, Heinsius, F H, Koch, H, Kopf, B, Kurilla, U, Meyer, CA, Peters, K, Pychy, J, Steinke, M, Wiedner, U
Format Journal Article
LanguageEnglish
Published 01.03.2015
Subjects
Angular distribution
Angular momentum
Beams (radiation)
CERN
Crystals
Decay
Density
Orbitals
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Summary:(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image).The spin density matrix of the ... has been determined for the reaction ... with unpolarized in-flight data measured by the Crystal Barrel LEAR experiment at CERN. The two main decay modes of the ... into ... and ... have been separately analyzed for various ...momenta between 600 and 1940 MeV/c. The results obtained with the usual method by extracting the matrix elements via the ... decay angular distributions and with the more sophisticated method via a full partial wave analysis are in good agreement. A strong spin alignment of the ... is clearly visible in this energy regime and all individual spin density matrix elements exhibit an oscillatory dependence on the production angle. In addition, the largest contributing orbital angular momentum of the ...system has been identified for the different beam momenta. It increases from ... ... 2 at 600 MeV/c to ... ... 5 at 1940 MeV/c.
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ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-015-3341-9