Elastic scattering and ω meson production near the threshold of π−p→ω+n

Nuclear bound states of ω mesons

“…The distortion factor causes a suppression of the cross section by typically two orders of magnitude. Substituting the response function (17) into the cross section (11) we can now study the effects of ω-nuclear binding on the missing energy spectrum measured in the transfer reaction. We choose the case 7 Li(d, 3 He) 6 ω He as an example, mainly for simplicity of its proton orbital structure and since this choice is referred to in the GSI proposal [8].…”

Vector meson production and nucleon resonance analysis in a coupled-channel approach for energiesmN<s<Penner1, Mosel2 2002Phys. Rev. C1428502View full textAdd to dashboardCite

“…These authors' findings seem to lead to an overestimation of the πN inelasticity in the 3 2 − (D 13 ) channel, which just starts overshooting the experimental data at the ωN threshold. Unfortunately, they do not compare their calculation to the angle-differential Karami cross section [56], which would allow for a further evaluation of the quality of their calculation. There has also been a single-channel analysis on πN → ωN by Titov et al [57] 4 .…”

The production of ω mesons in near the kinematic threshold

“…The 3 He were detected in the forward detector, covering a range in polar angle from 3 o to 18 o , which corresponds to 95% of the 3 He phase space in pd → 3 Heω at T p = 1450 MeV and 78% at T p = 1360 MeV. The forward detector consists of a sector-like window counter for triggering, a proportional chamber for precise angular information, a trigger hodoscope for triggering and offline particle identification, a range hodoscope for energy measurements and particle identification and a veto hodoscope for triggering.…”

“…The production of ω mesons in the π − p → nω reaction was studied extensively in the seventies at the Rutherford Laboratory [1]- [3]. An unexpected suppression of the cross section near threshold was observed.…”