The exotic eta'pi- Wave in 190 GeV pi-p --> pi-eta'p at COMPASS

Details The exotic eta'pi- Wave in 190 GeV pi-p --> pi-eta'p at COMPASS The exotic eta'pi- Wave in 190 GeV pi-p --> pi-eta'p at COMPASS

2011-08-31

arxiv.org/abs/1108.6191v2

Physics

High Energy Physics

High Energy Physics - Experiment

Conference: Hadron 2011. v2 added sentence intended to avoid misunderstanding of technical plot; Proceedings of the XIV Intern

Scientific paper

A sample of 35,000 events of the type pi-p --> eta'pi-p_slow (eta' --> eta pi-pi+, eta --> gamma gamma) with -t>0.1 GeV^2/c^2 was selected from COMPASS 2008 data for a partial-wave analysis. We study the broad P_+ structure known from previous experiments at lower energies, in particular its phase motion relative to the D_+-wave near the a_2(1320) mass and relative to a broad D_+-wave structure at higher mass. We also find the a_4(2040). We compare kinematic plots for the eta'pi^- and eta pi- final states.

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