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arXiv · 1306.6171

Opposite parity fermion mixing and baryons $1/2^{\pm}$

A. E. Kaloshin·E. A. Kobeleva·V. P. Lomov
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Abstract

We develop a variant of $K$-matrix, which includes the effect of opposite parity fermions (OPF) mixing, and apply it for description of $πN$ partial waves $S_{11}$ and $P_{11}$. OPF-mixing leads to appearance of negative energy poles in $K$-matrix and restoration of MacDowell symmetry, relating two partial waves. Joint analysis of PWA results for $S_{11}$ and $P_{11}$ confirms significance of this effect.

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A. E. Kaloshin, E. A. Kobeleva, V. P. Lomov. 2013-06-26. Opposite parity fermion mixing and baryons $1/2^{\pm}$. https://doi.org/10.1142/s0217732313501563

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