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Behrend, H.J.; Fenner, H.; Schachter, M.J.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.); Cello Collaboration1984
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.); Cello Collaboration1984
AbstractAbstract
[en] The production of the f0 in two photon collisions, with the subsequent decay f0->π+π- has been observed in the CELLO detector at PETRA. The f0 peak was found to lie on a dipion continuum and to be shifted downwards in mass by approx.= 50 MeV/c2. The ππ mass spectrum from 0.8 to 1.5 GeV/c2 was well fitted by the model of Mennessier using only a unitarised Born amplitude and helicity 2 f0 amplitude. The previously observed mass shift and distortion of the f0 peak are explained by strong interference between the Born and f0 amplitudes. The only free parameter in the fit of the data to the model is the radiative width GAMMAsub(γγ)(f0). It was found that: GAMMAsub(γγ)(f0) = 2.5 +- 0.1 +- 0.5 keV where the first (second) quoted errors are statistical (systematic). (orig.)
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Jan 1984; 31 p
Record Type
Report
Literature Type
Numerical Data
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ANGULAR DISTRIBUTION, BORN APPROXIMATION, DIFFERENTIAL CROSS SECTIONS, EFFECTIVE MASS, EXPERIMENTAL DATA, F-1260 RESONANCES, GEV RANGE 01-10, HADRONIC PARTICLE DECAY, MASS SPECTRA, PAIR PRODUCTION, PARTICLE WIDTHS, PHOTON-PHOTON INTERACTIONS, PHOTOPRODUCTION, PIONS MINUS, PIONS PLUS, RADIATIVE DECAY
ANTIMATTER, ANTIMESONS, ANTIPARTICLES, BASIC INTERACTIONS, BOSONS, CROSS SECTIONS, DATA, DECAY, DISTRIBUTION, ELECTROMAGNETIC INTERACTIONS, ELEMENTARY PARTICLES, ENERGY RANGE, GEV RANGE, HADRONS, INFORMATION, INTERACTIONS, MASS, MATTER, MESON RESONANCES, MESONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, PARTICLE PRODUCTION, PARTICLE PROPERTIES, PIONS, PSEUDOSCALAR ANTIMESONS, PSEUDOSCALAR MESONS, RESONANCE PARTICLES, SPECTRA
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