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Sign ambiguity in the K Sigma channel | | A.V. Anisovich
; E. Klempt
; V.A. Nikonov
; A.V. Sarantsev
; U. Thoma
; | | Date: |
14 Oct 2013 | | Abstract: | Ambiguities of the signs of $N o Sigma K$ coupling constants are studied in
a multichannel partial wave analysis of a large body of pion and photo-induced
reactions. It is shown that the signs are not free from some ambiguities, and
further experimental data are needed. Data on the reactions $pi^+p o
Sigma^+K^+$ and $gamma p o K^+Sigma^0$ define rather well the isospin 3/2
contributions to these channels. However the lack of information on
polarization observables for the reactions $pi^-p o Sigma^0K^0$, $pi^-p o
Sigma^-K^+$ and $gamma p o K^0Sigma^+$ does not allow us to fix uniquely
the signs of $N o Sigma K$ coupling constants. As a consequence, also the
contributions of nucleon resonances to these channels remain uncertain. | | Source: | arXiv, 1310.3610 | | Services: | Forum | Review | PDF | Favorites | |
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