First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons

Helicity-Dependent Cross Sections for the Photoproduction of π0 Pairs from Nucleons

“…[38] for η production, the most similar analysis was for ηπ 0 pairs in Ref. [12]). A detailed description of the present analysis will be given in a longer paper.…”

“…(see Refs. [8][9][10][11][12][13]). Sequential resonance decays leave different imprints in the cross sections for π 0 π 0 and ηπ 0 pairs and are thus complementary.…”

“…The experimental setup and the analysis procedures were described in Refs. [12,[37][38][39] which used the same dataset for other reaction channels (Nη, Nπ 0 , and Nηπ 0 ) (most details were given in Ref. [38] for η production, the most similar analysis was for ηπ 0 pairs in Ref.…”

“…[40] (see also Refs. [12,[37][38][39]). The photons were energy tagged with the Glasgow magnetic spectrometer [41].…”

“…The polarization of the bound nucleons was corrected for nuclear effects as in Refs. [12,[37][38][39]. The detector was composed of the electromagnetic calorimeters Crystal Ball [42] and TAPS [43] covering almost the full solid angle [12,[37][38][39].…”