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Amplitude analysis of the K/sup -/K/sup +/ system produced in the reactions. pi. /sup -/p. -->. K/sup -/K/sup +/N and. pi. /sup +/N. -->. K/sup -/K/sup +/p at 6 GeV/c. [S'(1300)]

Conference ·
OSTI ID:6626677
An amplitude analysis of the K/sup -/K/sup +/ system produced in the reactions ..pi../sup -/p ..-->.. K/sup -/K/sup +/n and ..pi../sup +/n ..-->.. K/sup -/K/sup +/p was carried out using data from a high statistics experiment carried out with the Argonne Effective Mass Spectrometer. Combining the results from the two reactions allows the separation of the KantiK production amplitudes into their isospin-zero and one components. An enhancement is deserved in the S-wave amplitude near 1300 MeV which we call the S'. Using various physical arguments, including the t dependence of the amplitudes, six out of eight mathematically-allowed solutions can be eliminated for the magnitudes and phases of the amplitudes and shown that this new S-wave state has isospin zero. Requiring a reasonable behavior for the isospin-one P wave shows that the S' amplitude has a slow phase variation through the peak region.
Research Organization:
Argonne National Lab., IL (USA)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
6626677
Report Number(s):
ANL-HEP-PR-78-22; CONF-780826-1
Country of Publication:
United States
Language:
English

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