Hadron spectroscopy in diffractive and central production processes at COMPASS

COMPASS is a fixed-target experiment using secondary high-energetic hadron beams provided by the CERN SPS. In 2008 and 2009, a large amount of data has been collected with a 190GeV/c pion beam for the investigation of the hadron spectrum in diffractive and central production processes. A big variety of observed final states, including pi(-) pi(+) pi(-), pi(-) pi(0) pi(0), pi(-) eta eta, pi-KsKs, pi-K+K-, K-pi(+)pi(-), and centrally produced 4 pi, is being analysed. The potential for systematic spectroscopic studies especially concerning the existence and nature of spin-exotic, hybrid and glueball states is discussed. In addition, we show the first results from the data set collected with a proton beam in 2008. These data indicate the chance of COMPASS to contribute to the field of baryon spectroscopy.