Laser-plasma accelerator group

Research group

Research theme

Sub department

About

Global jet properties at 14-44 GeV center of mass energy in e+e- annihilation

Zeitschrift für Physik C Particles and Fields 47:2 (1990) 187-198

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, R Wedemeyer, B Foster, AJ Martin, E Bernardi, J Chwastowski, A Eskreys, K Genser, H Hultschig, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, JM Pawlak, KU Pösnecker, E Ros, D Trines, R Walczak, G Wolf, H Kolanoski, J Krüger, E Lohrmann, G Poelz, W Zeuner, J Hassard, J Shulman, D Su, I Tomalin, F Barreiro, G Cases, L Hervas, J del Peso, MG Bowler, PN Burrows, RJ Cashmore, ME Veitch, JC Hart, DH Saxon, S Brandt, M Holder, Y Eisenberg, U Karshon, A Montag, D Revel, E Ronat, N Wainer, A Caldwell, D Muller, S Ritz, D Strom, M Takashima, SL Wu, G Zobernig

Abstract:

Jet properties in e+e- annihilation at center of mass energies of 14, 22, 35 and 43.7 GeV were studied with the data collected in the TASSO detector at PETRA, using the same evaluation procedures for all the energies. The total hadronic cross section ratio for the center of mass energy interval 39-47 GeV was determined to be ℛ=4.11±0.05 (stat)±0.18(syst.) at {Mathematical expression} GeV. Corrected distributions of global shape variables are presented as well as the inclusive charged particle distributions for scaled momentum and transverse momentum. The center of mass energy evolution of the average sphericity, thrust, aplanarity and particle momentum is shown. © 1990 Springer-Verlag.
More details from the publisher
More details

Strange meson production in e+e- annihilation

Zeitschrift für Physik C Particles and Fields 47:2 (1990) 167-179

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, R Wedemeyer, B Foster, AJ Martin, F Barreiro, E Bernardi, J Chwastowski, A Eskreys, K Gather, K Genser, H Hultschig, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, JM Pawlak, KU Pösnecker, E Ros, D Trines, R Walczak, G Wolf, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, W Zeuner, J Hassard, J Shulman, D Su, I Tomalin, A Watson, G Cases, L Hervas, A Leites, J del Peso, JF de Trocóniz, MG Bowler, PN Burrows, R Cashmore, ME Veitch, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, Y Eisenberg, U Karshon, G Mikenberg, A Montag, D Revel, E Ronat, A Shapira, N Wainer, G Yekutieli, A Caldwell, D Muller, S Ritz, D Strom, M Takashima, SL Wu, G Zobernig

Abstract:

The full TASSO data have been used to study the inclusive production of strange mesons in e+e- annihilations. Differential and total cross sections have been measured in the centre of mass energy range 14 to 44 GeV for K0, {Mathematical expression} and 34.5 to 44 GeV for K*± (892). We have investigated the strange meson production properties in jets by studying the rapidity and pt2 distributions as well as the evolution of the multiplicities as a function of the event sphericity. We find no evidence that the strange meson yields increase with increasing sphericity faster than the total charged multiplicity. © 1990 Springer-Verlag.
More details from the publisher
More details

F2-PUMPED NO - LASER OSCILLATION AT 218NM AND PROSPECTS FOR NEW LASER TRANSITIONS IN THE 160-250NM REGION

IEEE JOURNAL OF QUANTUM ELECTRONICS 26:9 (1990) 1529-1535

Authors:

SM HOOKER, CE WEBB
More details from the publisher

THE ABSORPTION OF 158-NM RADIATION IN NITRIC-OXIDE - THE PROSPECTS FOR AN OPTICALLY PUMPED VACUUM ULTRAVIOLET-LASER

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY 51:2 (1990) 127-131

Authors:

SM HOOKER, CE WEBB
More details from the publisher

A measurement of electroweak effects in the reaction e+e- → τ+τ- at 35.0 and 42.4 GeV

Zeitschrift für Physik C Particles and Fields 43:4 (1989) 549-555

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, HM Fischer, H Partmann, J Hartmann, E Hilger, A Jocksch, R Wedemeyer, B Foster, AJ Martin, E Bernardi, J Chwastowski, K Gather, K Genser, H Kowalski, B Löhr, D Lüke, D Notz, JM Pawlak, KU Pösnecker, E Ros, R Walczak, G Wolf, H Kolanoski, J Krüger, E Lohrmann, G Poelz, W Zeuner, J Hassard, J Shulman, D Su, IR Tomalin, F Barreiro, A Leites, J del Peso, M Traseira, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, GP Heath, PN Ratoff, IM Silvester, ME Veitch, JC Hart, DH Saxon, S Brandt, M Holder, Y Eisenberg, U Karshon, G Mikenberg, A Montag, D Revel, E Ronat, AN Wainer, G Yekutieli, D Muller, S Ritz, M Takashima, SL Wu, G Zobernig

Abstract:

We report on total cross section and forward backward charge asymmetry measurements of the reaction e+e- → τ+τ- at centre of mass energies of 35.0 GeV and 42.4 GeV using the TASSO detector. Including previous data an analysis in terms of electroweak parameters of the standard model is presented, and lower limits on mass scale parameters of residual contact interactions are given. A combined analysis of electroweak couplings using all our results on leptonic reactions e+e-→l+l- has been performed. © 1989 Springer-Verlag.
More details from the publisher
More details