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Measurement of the Spin of the Omega(-) Hyperon

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BABAR Collaboration (Including:

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A. et al.
). (2006) Measurement of the Spin of the Omega(-) Hyperon. Physical Review Letters, Vol.97 (No.11). Article: 112001. ISSN 0031-9007

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Abstract

A measurement of the spin of the Omega(-) hyperon produced through the exclusive process Xi(0)(c)->Omega K--(+) is presented using a total integrated luminosity of 116 fb(-1) recorded with the BABAR detector at the e(+)e(-) asymmetric-energy B factory at SLAC. Under the assumption that the Xi(0)(c) has spin 1/2, the angular distribution of the Lambda from Omega(-)->Lambda K- decay is inconsistent with all half-integer Omega(-) spin values other than 3/2. Lower statistics data for the process Omega(0)(c)->Omega(-)pi(+) from a 230 fb(-1) sample are also found to be consistent with Omega(-) spin 3/2. If the Xi(0)(c) spin were 3/2, an Omega(-) spin of 5/2 could not be excluded.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Date: 15 September 2006
Volume: Vol.97
Number: No.11
Number of Pages: 7
Page Range: Article: 112001
Identification Number: 10.1103/PhysRevLett.97.112001
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
URI: http://wrap.warwick.ac.uk/id/eprint/33014

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