Actions for Measurement of the K1° Branching Ratio [Dissertation].

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Measurement of the K1° Branching Ratio [Dissertation].

Author
Cooper, William A.
Published
United States : [publisher not identified], 1971.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1971.
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
The fraction of K° production which decays in the mode K1 → π+π- has been measured to be 0.345 ± 0.005. From this, we find the K1 branching ratio R = (Rate for K1 → π+π-)/(Rate for K1 → π°π°) to be 2.23 ± 0.10, in disagreement with the ΔI = 1/2 rule prediction R = 2.0. A comparison with K+ → π+π° decays, where the ΔI = 1/2 rule violation is comparable to that observed in K1 decays, shows that no AI = 5/2 component is required by the data, and upper limits to its contribution can be set under various assumptions. Assuming ΔI = 5/2 to be absent, the difference between the I = 2 and I = 0 strong interaction phase shifts at the K mass is found to be 46^{+19}_{-30}°.
Report Numbers
NEVIS-187
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(30-1)-1932
NSA number: NSA-25-050052
OSTI Identifier 4698252
Research organization: Columbia University, Irvington-on-Hudson, NY (United States). Nevis Laboratories.
Funding Information
Sponsored by US Atomic Energy Commission (AEC).
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