2003/12/31 by N. N. Achasov, G. N. Shestakov · 2 citations
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevlett.92.182001
published as Phys.Rev.Lett. 92 (2004) 182001 · RevTeX, 9 pages, 1 figure. A number of typographical and grammatical errors corrected
openalex publication_date 2004/05/05 · arxiv created 2004/05/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The K+ and K0 meson mass difference induces the mixing of the a00(980) and f0(980) resonances, the amplitude of which, between the K+K^\ensuremath- and K0K0 thresholds, is large in magnitude, of the order of mK√m_K02\ensuremath-m_K+2\ensuremath≈√\ensuremathα mK2, and possesses the phase sharply varying by about 90\ifmmode^∘\else\textdegree\fi. We suggest performing the polarized target experiments on the reaction \ensuremathπ^\ensuremath-p\ensuremath→\ensuremathη\ensuremathπ0n at high energy in which the fact of the existence of a00(980)\ensuremath-f0(980) mixing can be unambiguously and very easily established through the presence of a strong jump in the azimuthal asymmetry of the \ensuremathη\ensuremathπ0 S wave production cross section near the KK thresholds. The presented estimates of the polarization effect to be expected in experiment are to a great extent model independent.