Polarized $pK^-$ scattering in Unitary Baryon Chiral Perturbation Theory

Details Polarized $pK^-$ scattering in Unitary Baryon Chiral Perturbation Theory Polarized $pK^-$ scattering in Unitary Baryon Chiral Perturbation Theory

2010-02-07

arxiv.org/abs/1002.1470v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

v2: Two references added.

Scientific paper

We study $pK^-$ scattering in the energy range from threshold through the $\Lambda(1520)$ peak in UBChPT, taking into account $\mathcal{O}(q)$ vertices from meson-baryon contact interactions and $s$- and $u$-channel ground-state baryon exchange, $s$- and $u$-channel decuplet- and nonet-baryon exchange and $t$-channel vector-meson exchange, as well as $\mathcal{O}(q^2)$ flavor-breaking vertices. Detailed fits to data are presented, including a substantial body of differential cross-section data with meson momentum $q_\mathrm{lab} > 300$ MeV not considered in previous treatments.

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