Diffractive dissociation into K_sK^±π^∓π^- final states

2011/09/01 by Bernhard, Johannes, Nerling, Frank
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.1109.0219

Abstract

The COMPASS fixed-target experiment at CERN/SPS is dedicated to the study of hadron structure and spectroscopy, especially the search for spin-exotic states. After having started to study the existence of the spin-exotic π₁(1600) resonance in the 2004 pilot-run data, the new 2008/09 data will enable us to further clarify the situation. Apart from the π₁(1600) resonance, also a spin-exotic π₁(2000) was reported in the past in the f₁(1285)π decay channel by the E852/BNL experiment, however, this state still lacks confirmation. We present a first event selection of the diffractively produced (KKππ)^- system showing clean f₁(1285) and f₁(1420) resonances at competing statistics. A partial-wave analysis started on f₁(1285)π and f₁(1420)π decay channels will further complete the search for spin-exotics in the 2008/09 COMPASS data.

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