Phys. Rev. C 61, 027601 (2000) [4 pages]Search for double-Λ hypernuclei formation via (Ξ-,12C)atom⃗ΛΛ12B+nReceived 9 August 1999; published 12 January 2000 Measurement of the energy of neutrons in coincidence with the production of free Ξ- hyperons can be used to determine the masses of ΛΛ12B hypernuclear states and branching ratios of their formation from (Ξ-,12C)atom⃗ΛΛ12B+n. The E885 Collaboration utilized the Alternating Gradient Synchrotron 1.8 GeV/c K- beam incident on a diamond target to accumulate the largest-to-date data sample of (K-,K+) events. A total of about 3×105 (K-,K+) events have been collected and analyzed. The neutron spectrum shows no apparent peaks from the neutron-emission channel of double-Λ hypernuclear formation from (Ξ-,12C)atom decay. The upper limit on the branching ratio of the above process has been set to be at or below 4% in the region of expected neutron energies. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.61.027601
DOI:
10.1103/PhysRevC.61.027601
PACS:
21.80.+a, 21.30.Fe
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