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/pThe 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
Abstract:
A partial-wave analysis and an isospin analysis are presented of the (Kππ)- systems produced in the reactions K-p→K-π-π+ and K-p→K0π-π-p u sing the high-statistics bubble-chamber data at 4.2 GeV/c. The energy dependence of JP = 1+ waves is investigated in a comparison with results at higher energy. The dominant 1+0+ (K*π) with its maximum in the Q2 (1.4 GeV) region is an almost pure I = 1 2 state. The energy dependence of 1+0+ (K*π) at low masses is consistent with pomeron exchange while at higher masses (including the Q2 region) other natural exchanges are involved. The 1*1+ (Kρ{variant}) has its maximum at about 1.3 GeV. The relative phase between these two 1+ states is consistent with Q1-Q2 contribution to the 1+ state. Properties of the Q resonances are obtained in a fit of a two-resonance model to the 1+ date. There is no clear evidence for the 0- resonance seen at SLAC. © 1979.Production and decay properties of the D(1285) meson in K-p interactions at 4.2 GeV/c
Nuclear Physics, Section B 151:C (1979) 181-192