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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.
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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
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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
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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.
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Proposed vacuum ultraviolet laser in nitric oxide

(1989) 112-113

Authors:

SM Hooker, CE Webb

Abstract:

An optically pumped laser that operates in the VUV region of the spectrum with pulse energies in the millijoule range is proposed. The laser is expected to oscillate on ten to 13 new laser lines between 158 and 250 n. The transmission of the F2 pump laser output was measured as a function of NO pressure to deduce the absorption cross section. The absorption was also modeled using spectral rate equations. The model reproduces the observed transmission very well and predicts that the broadening of the absorption line is due to rapid quenching of the upper level. The measurements are not consistent with the results reported by T.J. McKee The predicted upper level population is of the order of 8 × 1014 cm-3 for an NO pressure of 800 mbar, which would give a small signal gain of ≈ 1 cm-1 for the strongest line. On the basis of this it appears to be possible to realize the proposed laser.