Study of {pi}{sup -}p{yields}{pi}{sup -{eta}p} and {pi}{sup -}p{yields}{pi}{sup -{eta}{eta}}p at {radical}(s) = 18.9 GeV with the COMPASS experiment

Journal Article · Thu Aug 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3483381· OSTI ID:21426444

Uman, I; Schlueter, T ^[1]

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1. Department fuer Physik, Ludwig-Maximilians-Universitaet, Am Coulombwall 1, 85748 Garching (Germany)

The COMPASS experiment at CERN studies diffractively produced states in the light quark sector with unprecedented statistics. The observation of f{sub 0}(1500)/f{sub 2}'(1525) decaying to {eta}{eta} in 2008 data with incoming negative pion beam at 190 GeV/c poses the question whether it is produced centrally or formed by the decay of a heavier diffractively produced {pi}{sub 1}(1800)/{pi}{sub 2}(1880). To decide, a dedicated amplitude analysis which includes different production mechanisms is formulated and compared with one which was used to fit centrally produced resonances including f{sub 0}(1500) by the WA102 experiment. Unbinned mass-dependent log-likelihood fitting methods may serve to solve the ambiguities which are present in binned, mass-independent partial wave analyses.

• OSTI ID: 21426444
• Journal Information: AIP Conference Proceedings, Vol. 1257, Issue 1; Conference: HADRON 2009: 13. international conference on hadron spectroscopy, Tallahassee, FL (United States), 29 Nov - 4 Dec 2009; Other Information: DOI: 10.1063/1.3483381; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN SPS SYNCHROTRON
D QUARKS
DIFFRACTION MODELS
ETA MESONS
F0-1590 MESONS
F2 PRIME-1525 MESONS
GEV RANGE
GLUONS
MULTIPARTICLE SPECTROMETERS
PARTIAL WAVES
PARTICLE DECAY
PARTICLE IDENTIFICATION
PION-PROTON INTERACTIONS
RESONANCE PARTICLES
REST MASS
TRANSITION AMPLITUDES
U QUARKS
ACCELERATORS
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BOSONS
CYCLIC ACCELERATORS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MASS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PION-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
QUARKONIUM
QUARKS
SCALAR MESONS
SPECTROMETERS
STRANGEONIUM
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