Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.017 seconds
AbstractAbstract
[en] The reaction anti pp→anti ΛΛ has been studied at an excess energy of 92 MeV (1.695 GeV/c anti p-momentum) at the CERN Low Energy Antiproton Ring (LEAR). Based on a high statistic of 11362 analyzed anti ΛΛ-events accurate results for Λ(anti Λ)-life time, total and differential cross sections, polarization and spin correlations are presented. A comparison of the asymmetry parameters and the mean life times of Λ and anti Λ gives new lower limits for the validity of the CP- and the CPT-invariance in the Λ-system. For the singlet fraction S = -0.032 ± 0.030 was measured: the anti ΛΛ are produced in a pure triplet state. (orig.)
[de]
Die Reaktion anti pp→anti ΛΛ wurde am Antiprotonen-Speicherring LEAR des CERN bei einem anti p-Impuls von 1.695 GeV/c gemessen, dies entspricht einer Ueberschussenergie von 91.7 MeV. Auf der Basis von 11362 rekonstruierten anti ΛΛ-Ereignissen, der hoechsten Statistik fuer einen einzelnen anti p-Impuls in diesem Impulsbereich, konnten der totale und die differentiellen Wirkungsquerschnitte, die Polarisation und die Spinkorrelationen mit vergleichsweise hoher Genauigkeit bestimmt und neue untere Grenzen fuer die Gueltigkeit der CP- und CPT-Invarianz im anti ΛΛ-System angegeben werden. (orig.)Original Title
Die Reaktion anti pp → anti ΛΛ 92 MeV ueber der Reaktionsschwelle
Primary Subject
Secondary Subject
Source
Dec 1989; 147 p; Diss.
Record Type
Report
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
ANGULAR DISTRIBUTION, ANNIHILATION, ANTILAMBDA PARTICLES, ANTIPROTONS, CP INVARIANCE, CPT THEOREM, DIFFERENTIAL CROSS SECTIONS, EXCLUSIVE INTERACTIONS, EXPERIMENTAL DATA, GEV RANGE 01-10, INTEGRAL CROSS SECTIONS, LAMBDA PARTICLES, LIFETIME, LIMITING VALUES, MEV RANGE 100-1000, NUCLEON-ANTINUCLEON INTERACTIO, PAIR PRODUCTION, PIONS MINUS, PIONS PLUS, POLARIZATION-ASYMMETRY RATIO, POLARIZED PRODUCTS, PROTON-ANTIPROTON INTERACTIONS, PROTONS, SYMMETRY BREAKING, WEAK HADRONIC DECAY
ANTIBARYONS, ANTIHYPERONS, ANTIMATTER, ANTINUCLEI, ANTINUCLEONS, ANTIPARTICLES, BARYON-BARYON INTERACTIONS, BARYONS, BOSONS, CATIONS, CHARGED PARTICLES, CROSS SECTIONS, DATA, DECAY, DISTRIBUTION, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, GEV RANGE, HADRON-HADRON INTERACTIONS, HADRONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, HYPERONS, INFORMATION, INTERACTIONS, INVARIANCE PRINCIPLES, IONS, LAMBDA BARYONS, MATTER, MESONS, MEV RANGE, NUCLEI, NUCLEONS, NUMERICAL DATA, PARTICLE DECAY, PARTICLE INTERACTIONS, PARTICLE PRODUCTION, PIONS, PSEUDOSCALAR MESONS, STRANGE PARTICLES, WEAK PARTICLE DECAY
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue