Misc,

Spin Physics at Compass

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(2004)cite arxiv:hep-ex/0411076 Comment: 12 pages, 7 figures. Invited paper at the 26th Course of the "International School of Nuclear Physics": Lepton Scattering and the Structure of Hadrons and Nuclei. Erice-Sicily: 16 - 24 September 2004. to be published on "Progress in Particle and Nuclear Physics".

Abstract

COMPASS is a new fixed target experiment presently in operation at CERN. It has the goal to investigate hadron structure and hadron spectroscopy by using either muon or hadron beams. From measurements of various hadron asymmetries in polarized muon - nucleon scattering it will be possible to determine the contribution of the gluons to the nucleon spin. Main objective of the hadron program is the search of exotic states, and glueballs in particular. This physics programme is carried out with a two-stage magnetic spectrometer, with particle identification and calorimetry in both stages, which has started collecting physics data in 2002, and will run at the CERN SPS at least until 2010. Preliminary results from the 2002 run with a 160 GeV muon beam are presented for several physics channels under investigation.

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