Reevaluation of the reported observation of the {sub {lambda}}{sub {lambda}}{sup 4}H hypernucleus

• Published in: Physical review. C, Nuclear physics Vol. 76; no. 6
• Main Authors: Randeniya, S. D., Hungerford, E. V.
• Format: Journal Article
• Language: English
• Published: United States 15-12-2007
• Subjects: BROOKHAVEN AGS; HELIUM 7; HYDROGEN 4; HYPERNUCLEI; LAMBDA BARYONS; NUCLEAR DECAY; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR STRUCTURE; PARTICLE DECAY; TRITIUM
• DOI: 10.1103/PHYSREVC.76.064308
• EISSN: 1089-490X
• ISSN: 0556-2813

The results of experiment E906, undertaken at the Alternating Gradient Synchrotron of the Brookhaven National Laboratory (BNL-AGS), were reanalyzed to clarify the signature of the decays of the double- and single-{lambda} hypernuclei that could have been produced in this experiment. This reanalysis indicates that instead of the reported decay of {sub {lambda}}{sub {lambda}}{sup 4}H through a proposed resonance in {sub {lambda}}{sup 4}He, it is more probable that the decay of the {sub {lambda}}{sub {lambda}}{sup 7}He hypernucleus was observed. This decay was accompanied by a background of coincident decays of pairs of the single hypernuclear fragments {sub {lambda}}{sup 3}H with {sub {lambda}}{sup 4}H, {sub {lambda}}{sup 3}H with {sub {lambda}}{sup 3}H, and {sub {lambda}}{sup 4}H with {sub {lambda}}{sup 4}H. An attempt was also made to determine if any other double or coincident single hypernuclear species could be observed in the data.