Abstract
This work enters into the domain of light quark meson spectroscopy. It consists in the study of the exclusive reaction {pi}/sup -/ p -> ({pi}/sup 0/eta) n measured in the NA12 experiment at CERN. After a short description of the experimental set-up, the selection procedures of the events and the detection efficiency corrections are discussed. The background sources for the reaction are also explained. The qualitative analysis of the selected events shows a strong forward-backward asymetry, in the Gottfried-Jackson frame of the {pi}/sup 0/eta system, in the 1400 MeV mass range. This asymetry could arise through the presence of an odd partial wave interfering with the D wave of a/sub 2/(1320) which dominates the mass spectrum. A partial wave analysis of the {pi}/sup 0/eta angular distributions is performed using three different methods. It indicates clearly the existence of a resonance with exotic quantum numbers: J/sup PC/ = 1/sup -+/, I/sup G/ = 1/sup -/ at M/sub {pi}//sup 0//sub eta/ {approx_equal} 1400 MeV. This is the first observation of a meson that can in no way be a qantiq state. A new structure is observed in the S partial wave with the quantum numbers J/sup PC/ = 0/sup ++/, and two
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Citation Formats
Boutemeur, M.
Study of {pi}/sup 0/ eta resonances produced in {pi}/sup -/p collisions at 100 GeV; Etude des resonances {pi}/sup 0/eta produites dans les collisions {pi}/sup -/ p a 100 GeV.
France: N. p.,
1988.
Web.
Boutemeur, M.
Study of {pi}/sup 0/ eta resonances produced in {pi}/sup -/p collisions at 100 GeV; Etude des resonances {pi}/sup 0/eta produites dans les collisions {pi}/sup -/ p a 100 GeV.
France.
Boutemeur, M.
1988.
"Study of {pi}/sup 0/ eta resonances produced in {pi}/sup -/p collisions at 100 GeV; Etude des resonances {pi}/sup 0/eta produites dans les collisions {pi}/sup -/ p a 100 GeV."
France.
@misc{etde_10102015,
title = {Study of {pi}/sup 0/ eta resonances produced in {pi}/sup -/p collisions at 100 GeV; Etude des resonances {pi}/sup 0/eta produites dans les collisions {pi}/sup -/ p a 100 GeV}
author = {Boutemeur, M}
abstractNote = {This work enters into the domain of light quark meson spectroscopy. It consists in the study of the exclusive reaction {pi}/sup -/ p -> ({pi}/sup 0/eta) n measured in the NA12 experiment at CERN. After a short description of the experimental set-up, the selection procedures of the events and the detection efficiency corrections are discussed. The background sources for the reaction are also explained. The qualitative analysis of the selected events shows a strong forward-backward asymetry, in the Gottfried-Jackson frame of the {pi}/sup 0/eta system, in the 1400 MeV mass range. This asymetry could arise through the presence of an odd partial wave interfering with the D wave of a/sub 2/(1320) which dominates the mass spectrum. A partial wave analysis of the {pi}/sup 0/eta angular distributions is performed using three different methods. It indicates clearly the existence of a resonance with exotic quantum numbers: J/sup PC/ = 1/sup -+/, I/sup G/ = 1/sup -/ at M/sub {pi}//sup 0//sub eta/ {approx_equal} 1400 MeV. This is the first observation of a meson that can in no way be a qantiq state. A new structure is observed in the S partial wave with the quantum numbers J/sup PC/ = 0/sup ++/, and two other new structures are also observed in the D partial wave with the quantum numbers J/sup PC/ = 2/sup ++/. The obtained results concerning the known resonances a/sub 0/(980) and a/sub 2/(1320) are in good agreement with previous results given by other experiments.}
place = {France}
year = {1988}
month = {Apr}
}
title = {Study of {pi}/sup 0/ eta resonances produced in {pi}/sup -/p collisions at 100 GeV; Etude des resonances {pi}/sup 0/eta produites dans les collisions {pi}/sup -/ p a 100 GeV}
author = {Boutemeur, M}
abstractNote = {This work enters into the domain of light quark meson spectroscopy. It consists in the study of the exclusive reaction {pi}/sup -/ p -> ({pi}/sup 0/eta) n measured in the NA12 experiment at CERN. After a short description of the experimental set-up, the selection procedures of the events and the detection efficiency corrections are discussed. The background sources for the reaction are also explained. The qualitative analysis of the selected events shows a strong forward-backward asymetry, in the Gottfried-Jackson frame of the {pi}/sup 0/eta system, in the 1400 MeV mass range. This asymetry could arise through the presence of an odd partial wave interfering with the D wave of a/sub 2/(1320) which dominates the mass spectrum. A partial wave analysis of the {pi}/sup 0/eta angular distributions is performed using three different methods. It indicates clearly the existence of a resonance with exotic quantum numbers: J/sup PC/ = 1/sup -+/, I/sup G/ = 1/sup -/ at M/sub {pi}//sup 0//sub eta/ {approx_equal} 1400 MeV. This is the first observation of a meson that can in no way be a qantiq state. A new structure is observed in the S partial wave with the quantum numbers J/sup PC/ = 0/sup ++/, and two other new structures are also observed in the D partial wave with the quantum numbers J/sup PC/ = 2/sup ++/. The obtained results concerning the known resonances a/sub 0/(980) and a/sub 2/(1320) are in good agreement with previous results given by other experiments.}
place = {France}
year = {1988}
month = {Apr}
}