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16 February 2025
 
  » arxiv » 1109.0219

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Diffractive dissociation into $K_sK^{pm}pi^{mp}pi^{-}$ final states
Johannes Bernhard ; Frank Nerling ;
Date 1 Sep 2011
AbstractThe 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 $pi_1(1600)$ resonance in the 2004 pilot-run data, the new 2008/09 data will enable us to further clarify the situation. Apart from the $pi_1(1600)$ resonance, also a spin-exotic $pi_1(2000)$ was reported in the past in the $f_1(1285)pi$ decay channel by the E852/BNL experiment, however, this state still lacks confirmation. We present a first event selection of the diffractively produced $(Kar{K}pipi)^{-}$ system showing clean $f_1(1285)$ and $f_1(1420)$ resonances at competing statistics. A partial-wave analysis started on $f_1(1285)pi$ and $f_1(1420)pi$ decay channels will further complete the search for spin-exotics in the 2008/09 COMPASS data.
Source arXiv, 1109.0219
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