Analysis of the diffractively produced π −π −π + final state at COMPASS
DOI:
https://doi.org/10.31349/SuplRevMexFis.3.0308020Keywords:
COMPASS, partial-wave analysis, PWA, pi(1800), hybrid, diffraction, light mesons, resonance, meson spectroscopyAbstract
The COMPASS experiment at CERN collected a large sample of diffractively produced π −π −π + events. The data contain contributions from light-meson resonances with the quantum numbers of πJ - and aJ -like states. We performed a partial-wave analysis of this final state for proton and nuclear targets. We consistently observe a π-like signal with J P C = 0−+ in the f2(1270)πD wave. The signal appears to be incompatible with the established π(1800) resonance, which we observe in the decays into (ππ)SπS, f0(980)πS and f0(1500)πS waves.
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Copyright (c) 2022 Florian Markus Kaspar, Sergei Gerassimov (Author)
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