SU(3) implications of the observation of the A1 and C mesons
Nuclear Physics, Section B 156:3 (1979) 532-547
Abstract:
A new determination of the QA-QB mixing angle and of the antisymmetric coupling for the vector-pseudoscalar decay of the axial vector mesons is presented. This uses information from the decay rates of the A1 and C mesons found in the study of baryon exchange processes in K-p interactions at 4.2 GeV/c combined with the decay rate B → ωπ. The consistency between the results obtained from backward produced A1 and C and diffractively produced Q1 and Q2 is discussed. © 1979.Properties of hadron final states in e+e- annihilation at 13 GeV and 17 GeV center of mass energies
Physics Letters B 83:2 (1979) 261-266
Abstract:
We have observed e+e- hadrons at C.M. energies of 13 GeV and 17 GeV at PETRA using the TASSO detector. We find R(13 GeV) = 5.6 ± 0.7 and R(17 GeV) = 4.0 ± 0.7. The additional systematic uncertainty is 20%. Comparing inclusive charged hadron spectra we observe scaling between 5 GeV and 17 GeV for x = p/pbeam > 0.2; however the 13 GeV cross section is above the 17 GeV cross section for smaller x. This may be due to copious bb̄ production. The events become increasingly jet like at high energies as evidenced by a shrinking sphericity distribution with increasing energy. © 1979.The reactions K- + p → pseudoscalar meson + Λ (1520) at 4.2 GeV/c
Nuclear Physics, Section B 149:2 (1979) 220-236
Abstract:
The total and differential cross sections of the reactions K-p → π0Λ (1520), ηΛ(1520) and η′ Λ(1520) have been measured. Prominent forward peaks are onserved in all three reactions. The first reaction shows also a backward peak. The spin density matrix elements of the Λ(1520) in this reaction are determined. For forward production the results show a remarkable alignment of the Λ(1520) corresponding to an M2 transition in the model of Stodolsky-Sakurai for 3 2- baryon production. © 1979.K andp off-shell annihilations fromK− +p → Λ + pions at 4.2 GeV/c
Zeitschrift für Physik C Particles and Fields Springer Nature 1:1 (1979) 3-17
Partial-wave analysis in the Q region of (ππ)- systems produced in K-p reactions at 4.2 GeV/c
Nuclear Physics, Section B 158:2-3 (1979) 265-279