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Dresden 2013 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 77: Hadronenstruktur und -spektroskopie

HK 77.1: Group Report

Thursday, March 7, 2013, 16:45–17:15, HSZ-304

Hadron Spectroscopy with COMPASS — •Boris Grube — Physik-Department E18, Technische Universität München

COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron aimed at studying the structure and spectrum of hadrons. One main goal is the search for new hadronic states, in particular hybrid mesons and glueballs. Its large acceptance, high resolution, and high-rate capability make the COMPASS experiment an excellent device to study the spectrum of light-quark mesons in diffractive and central production up to masses of about 2.5 GeV/c2. COMPASS is able to measure final states with charged as well as neutral particles, so that resonances can be studied in different reactions and decay channels. During 2008 and 2009, COMPASS took a large data sample using 190 GeV negative and positive hadron beams on various targets. The presented overview of the first results from this data set focuses in particular on the search for spin-exotic mesons in diffractively produced multi-particle final states and the analysis of central-production reactions in order to study glueballs in the scalar sector.

This work was supported by the BMBF, the DFG Cluster of Excellence “Origin and Structure of the Universe” (Exc 153), and the Maier-Leibnitz-Laboratorium der Universität und der Technischen Universität München.

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