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arXiv · 1108.6191

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

T. Schlüter
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Abstract

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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T. Schlüter. 2011-08-31. The exotic eta'pi- Wave in 190 GeV pi-p --> pi-eta'p at COMPASS. https://arxiv.org/abs/1108.6191

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