|
FIZIKA B 20 (2011) 2, 117-130
 
THE COMPASS HADRON SPECTROSCOPY PROGRAMME
ALEXANDER AUSTREGESILO
for the COMPASS Collaboration
Technische Universität München, Physik-Department E18,
James-Franck-Straße, 85748 Garching, Germany, and
CERN PH-SME, 1211 Geneva 23, Switzerland,
E-mail address: Alexander.Austregesilo@cern.ch
Received 1 February 2011; Accepted 9 November 2011
Online 16 January 2012
COMPASS is a fixed-target experiment at the CERN SPS for the
investigation of the structure and dynamics of hadrons.
The experimental setup features a large acceptance and high
momentum resolution spectrometer including particle
identification and calorimetry and is therefore ideal to
access a broad range of different final states. Following
the promising observation of a spin-exotic resonance during
an earlier pilot run, COMPASS focused on light-quark hadron
spectroscopy during the years 2008 and 2009. A data set,
world leading in terms of statistics and resolution, has been
collected with a 190 GeV/c hadron beam impinging on either
liquid hydrogen or nuclear targets. Spin-exotic meson and
glueball candidates formed in both diffractive dissociation
and central production are presently studied. Since the beam
composition includes protons, the excited baryon spectrum is
also accessible. Furthermore, Primakoff reactions have the
potential to determine radiative widths of the resonances
and to probe chiral perturbation theory. An overview of the
ongoing analyses will be presented. In particular, the
employed partial-wave analysis techniques will be
illustrated and recent results will be shown for a selection
of final states.
PACS numbers: 13.85.-t, 14.20.Gk
UDC 539.126
Keywords: COMPASS experiment, structure and dynamics of hadrons,
light-quark hadron spectroscopy, excited baryon spectrum
|
