You need JavaScript to view this

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

Thesis/Dissertation:

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  More>>
Authors:
Publication Date:
Apr 01, 1988
Product Type:
Thesis/Dissertation
Report Number:
LAPP-T-8802
Reference Number:
SCA: 662340; PA: FRD-89:000695; ERA-14:017576; EDB-89:039930; NTS-89:017326; SN: 89737340000
Resource Relation:
Other Information: TH: These (D. es Sci.); PBD: Apr 1988
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PION MINUS-PROTON INTERACTIONS; PARTICLE PRODUCTION; CROSS SECTIONS; GEV RANGE 10-100; PIONS NEUTRAL; ETA MESONS; NEUTRONS; MEASURING METHODS; A2-1320 MESONS; A0-980 MESONS; SPECTROSCOPY; D WAVES; P WAVES; S WAVES; EXPERIMENTAL DATA; 662340; HADRON INTERACTIONS
OSTI ID:
10102015
Research Organizations:
Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules Elementaires
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE88756883
Availability:
NTIS (US Sales Only), PC A; OSTI; NTIS (US Sales Only)
Submitting Site:
FRN
Size:
159 p.
Announcement Date:
Jun 30, 2005

Thesis/Dissertation:

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}
}