ANALYSIS OF K$sup -$ ABSORPTION IN DEUTERIUM
Journal Article
·
· Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B
OSTI ID:4166176
A theoretical examination was made of the capture of Kat rest by deuterium, principally in terms of final state ~ interactions. In particular total rates were calculated. the momentum spectra associated with the production of SIGMA /sup -/+ n + pi /sup +/ and lambda /sup 0/ + p i pi /sup -/ the corresponding ang ular correlation. (The latter are not found to be useful except perhaps as a check). On the basis of total rates it is known that capture from the P Bohr orbit through the s wave KH channel probably dominates. This assignment is reinforced by the spectrum of the low momentum lambda peak (d-s convented from r-s). A definitive check can be made when a somewhat better converted h spectrum is measured since one should observe a double peak (with a cusp at the maximum pion momentum associated with production) if this assignment is correct.Analysis of the high pion momentum lambda peak (directly produced lambda s). using this assigment reveals that the spectrumn is insensitive to the YN interaction and yet does not seem to agree with the data. This spectrum shape (and that for SIGMA /sup -//sup n/sup pi / depends significantly on the KN -- Y pi absorption process off the energy shell. which in turn depends on the KN scattering length. Preliminary comparison of data and theory indicates a large negative real part for the isotopic spin one KN scattering length. From the relative rate for conversion of SIGMA 's into lambda 's, a mininum value was dedaced for the:-~ginary part of the isotopic spin 1/2 p wave SIGMA N scattering length. The result, larger than the pion Compton pavelength, indicates a very strong potential in the SIGMA N channel and/or coupling SIGMA N and lambda N channels, a potential much stronger than indicated by the universal pion baryon interaction. Capture from the S Bohr orbit is also extensively discussed. In this case, the spectra associated with SIGMA /sup -/ and direct lambda production are sensitive to the final YN interaction. (auth)
- Research Organization:
- Indiana Univ., Bloomington
- NSA Number:
- NSA-14-008919
- OSTI ID:
- 4166176
- Journal Information:
- Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Journal Name: Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B Vol. Vol: (10) 14; ISSN NUCIA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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