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Anan'eva, M.A.; Vasilevskij, I.M.; Belini, D.P.
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Nuclear Problems1981
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Nuclear Problems1981
AbstractAbstract
[en] Performing a partial wave analysis of the π+π-π- system produced in a diffraction dissociation of an incident 40 GeV/c π- meson on Be, C, Al, Si, Ti, Cu, Ag, Ta, Pb nuclei a new pseudoscalar meson of 1.205+-0.007 GeV/c2 mass and of 0.320+-0.035 GeV/c2 width with pion quantum numbers which are radial excitations of quark structure of pion has been observed. The experiment has been carried out using JINR magnetic spectrometers on Serpukhov accelerator. 110,000 events have been analysed. As a result, it has been observed that phase variation of the 3π system with O-S quantum numbers is 85 deg on the width of resonance and it is constant relative to resonance phase of 1+S wave. Mass spectra of the O-S state are well described by the Breit-Wigner relativistic formula with slowly varying exponential background
[ru]
Original Title
Obnaruzhenie vozbuzhdennogo sostoyaniya piona novogo psevdoskalyarnogo mezona; Be, C, Al, Si, Ti, Cu, Ag, Ta, Pb targets
Primary Subject
Source
1981; 4 p; 4 refs.; 2 figs.; submitted to the journal JETP Lett. and 6. All-union conference on problems of high energy physics, Dubna, 1981.
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
ANTIMATTER, ANTIMESONS, ANTIPARTICLES, BOSONS, DATA, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, GEV RANGE, HADRON REACTIONS, HADRONS, INFORMATION, INTERACTIONS, MATHEMATICAL MODELS, MATTER, MESON REACTIONS, MESONS, NUCLEAR REACTIONS, NUMERICAL DATA, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PROPERTIES, PERIPHERAL MODELS, PION REACTIONS, PIONS, PSEUDOSCALAR ANTIMESONS, SPECTRA
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