Experimental study of the $ \gamma p \rightarrow K^{0}\Sigma^{+}$, $ \gamma n \rightarrow K^{0} \Lambda$, and $ \gamma n \rightarrow K^{0} \Sigma^{0}$ reactions at the Mainz Microtron

Abstract

This work measured dσ/dΩ for neutral kaon photoproduction reactions from threshold up to a c.m. energy of 1855 MeV, focussing specifically on the γp → K 0 Σ + , γn → K 0 Λ, and γn → K 0 Σ 0 reactions. Our results for γn → K 0 Σ 0 are the first-ever measurements for that reaction. These data will provide insight into the properties of N * resonances and, in particular, will lead to an improved knowledge about those states that couple only weakly to the πN channel. Integrated cross sections were extracted by fitting the differential cross sections for each reaction as a series of Legendre polynomials and our results are compared with prior experimental results and theoretical predictions.

Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom

“…The situation would be clarified if the neutron helicity amplitudes of N * were better constrained. Much progress has been made recently in this direction because of the newly released data of γn reactions [50][51][52], also γn → K 0 Λ/K 0 Σ 0 from A2 [53], BGOOD [54], and CLAS Collaboration [55], γn → K + Σ − from CLAS Collaboration [56,57], and γn → π 0 n from A2 Collaboration [58], γn → π − p from CLAS [59] and PIONS@MAX-lab [60,61] and CLAS Collaboration [62]. So the model analysis of this structure was expected to be refined soon.…”