Abstract
A new solid angle detector, SPESO-2{pi}, has been constructed in order to obtain clear data for this reaction. It consists mainly of 24 lead glass bars, arranged vertically in two shells around the liquid hydrogen target. A circle of scintillators vetoes charged particles. The bars serve as Cerenkov counters. A new fast topological trigger was developed which rapidly separates good configurations of two photon hits from background. A simulation code was set up that offered the opportunity to create pion events according to several theoretical models. The combination of measured values and simulation calculation provided the final results. The total cross sections follow exactly the established excitation function, but with much smaller error bars. No indication for a narrow dibaryon resonance with M=2121 MeV has been found. The differential cross sections were established over half of the angular range and the analyzing power has been measured for the first time in such a systematic way. The comparison with neutron-proton scattering with charged pion production reveals the existence of a non negligible partial cross section below 600 MeV.
Citation Formats
Rappenecker, G.
Measurement of total and differential cross sections and analyzing power for pions in inelastic proton-proton anti pp{yields}pp{pi}deg scattering; Mesures des sections efficaces totales et differentielles et du pouvoir d`analyse pour les pions de la reaction antipp{yields}pp{pi}deg.
France: N. p.,
1992.
Web.
Rappenecker, G.
Measurement of total and differential cross sections and analyzing power for pions in inelastic proton-proton anti pp{yields}pp{pi}deg scattering; Mesures des sections efficaces totales et differentielles et du pouvoir d`analyse pour les pions de la reaction antipp{yields}pp{pi}deg.
France.
Rappenecker, G.
1992.
"Measurement of total and differential cross sections and analyzing power for pions in inelastic proton-proton anti pp{yields}pp{pi}deg scattering; Mesures des sections efficaces totales et differentielles et du pouvoir d`analyse pour les pions de la reaction antipp{yields}pp{pi}deg."
France.
@misc{etde_10127445,
title = {Measurement of total and differential cross sections and analyzing power for pions in inelastic proton-proton anti pp{yields}pp{pi}deg scattering; Mesures des sections efficaces totales et differentielles et du pouvoir d`analyse pour les pions de la reaction antipp{yields}pp{pi}deg}
author = {Rappenecker, G}
abstractNote = {A new solid angle detector, SPESO-2{pi}, has been constructed in order to obtain clear data for this reaction. It consists mainly of 24 lead glass bars, arranged vertically in two shells around the liquid hydrogen target. A circle of scintillators vetoes charged particles. The bars serve as Cerenkov counters. A new fast topological trigger was developed which rapidly separates good configurations of two photon hits from background. A simulation code was set up that offered the opportunity to create pion events according to several theoretical models. The combination of measured values and simulation calculation provided the final results. The total cross sections follow exactly the established excitation function, but with much smaller error bars. No indication for a narrow dibaryon resonance with M=2121 MeV has been found. The differential cross sections were established over half of the angular range and the analyzing power has been measured for the first time in such a systematic way. The comparison with neutron-proton scattering with charged pion production reveals the existence of a non negligible partial cross section below 600 MeV.}
place = {France}
year = {1992}
month = {Dec}
}
title = {Measurement of total and differential cross sections and analyzing power for pions in inelastic proton-proton anti pp{yields}pp{pi}deg scattering; Mesures des sections efficaces totales et differentielles et du pouvoir d`analyse pour les pions de la reaction antipp{yields}pp{pi}deg}
author = {Rappenecker, G}
abstractNote = {A new solid angle detector, SPESO-2{pi}, has been constructed in order to obtain clear data for this reaction. It consists mainly of 24 lead glass bars, arranged vertically in two shells around the liquid hydrogen target. A circle of scintillators vetoes charged particles. The bars serve as Cerenkov counters. A new fast topological trigger was developed which rapidly separates good configurations of two photon hits from background. A simulation code was set up that offered the opportunity to create pion events according to several theoretical models. The combination of measured values and simulation calculation provided the final results. The total cross sections follow exactly the established excitation function, but with much smaller error bars. No indication for a narrow dibaryon resonance with M=2121 MeV has been found. The differential cross sections were established over half of the angular range and the analyzing power has been measured for the first time in such a systematic way. The comparison with neutron-proton scattering with charged pion production reveals the existence of a non negligible partial cross section below 600 MeV.}
place = {France}
year = {1992}
month = {Dec}
}