INFLUENCE OF THE $lambda$ $pi$ RESONANCE ON CORRELATIONS IN THE REACTION K$sup -$ + d $Yields$ $lambda$ + $pi$$sup -$ + p
Journal Article
·
· Phys. Rev. Letters
A 15-in. deuterium bubble chamber was exposed to a 450-Mev/c separated K/ sup -/ beam, and a group of events were examined corresponding to K/sup -/ + d yields LAMBDA + pi /sup -/ + p and K/sup -/ + d yields SIGMA /sup o/ + pi /sup -/ + p, SIGMA /sup o/ yields LAMBDA + gamma . The distribution of proto n and pion energies and their spectra are given. Two peaks appear in the pion spectram at 92 and 147 Mev; the 92-Mev peak agrees well with that calculated on the basis of SIGMA LAMBDA conversion and the zero-effective-range theory for the Swave interaction. The assumption of a LAMBDA pi resonance of total mass of 1382 Mev and half width of plus or minus 20 Mev gives a proton spectral peak near 30.5 Mev, in agreement with experiment. The contributions of direct production and conversion to the proton spectrum are also shown. The region of proton energies 5 to 20 Mev, where SIGMA LAMBDA conversion is negligible, is considered. Finally, the interactions are compared with the nonmesonic processes K/sup -/ + d yields SIGMA /sup -/ + p, SIGMA /sup o/ + n, or SIGMA + n. (D.L.C.)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-15-011999
- OSTI ID:
- 4075493
- Report Number(s):
- UCRL-9514
- Journal Information:
- Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 6
- Country of Publication:
- United States
- Language:
- English
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