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RHO-RHO production by two photon scattering

Physics Letters B 97:3-4 (1980) 448-452

Authors:

R Brandelik, W Braunschweig, K Gather, V Kadansky, K Lübelsmeyer, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, AS von Dratzig, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, L Koepke, H Kolanoski, P Leu, B Löhr, R Wedemeyer, N Wermes, M Wollstadt, H Burkhardt, DG Cassel, D Heyland, H Hultschig, P Joos, W Koch, P Koehler, U Kötz, H Kowalski, A Ladage, D Lüke, HL Lynch, P Mättig, G Mikenberg, D Notz, J Pyrlik, R Riethmüller, M Schliwa, P Söding, BH Wiik, G Wolf, R Fohrmann, M Holder, G Poelz, O Römer, R Rüsch, P Schmüser, DM Binnie, PJ Dornan, NA Downie, DA Garbutt, WG Jones, SL Lloyd, D Pandoulas, J Sedgbeer, S Yarker, C Youngman, RJ Barlow, I Brock, RJ Cashmore, R Devenish, P Grossmann, J Illingworth, M Ogg, B Roe, GL Salmon, T Wyatt, KW Bell, B Foster, JC Hart, J Proudfoot, DR Quarrie, DH Saxon, PL Woodworth, E Duchovni, Y Eisenberg, U Karshon, D Revel, E Ronat, A Shapira, J Freeman, P Lecomte, T Meyer, SL Wu, G Zobernig
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Production and properties of the τ-lepton in e+e- annihilation at C.M. energies from 12 to 31.6 GeV

Physics Letters B 92:1-2 (1980) 199-205

Authors:

R Brandelik, W Braunschweig, K Gather, V Kadansky, K Lübelsmeyer, P Mättig, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, AS von Dratzig, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, P Leu, B Löhr, R Wedemeyer, N Wermes, M Wollstadt, DG Cassel, D Heyland, H Hultschig, P Joos, W Koch, P Koehler, U Kötz, H Kowalski, A Ladage, D Lüke, HL Lynch, G Mikenberg, D Notz, J Pyrlik, R Riethmüller, M Schliwa, P Söding, BH Wiik, G Wolf, R Fohrmann, M Holder, G Poelz, O Römer, R Rüsch, P Schmüser, DM Binnie, PJ Dornan, NA Downie, DA Garbutt, WG Jones, SL Lloyd, D Pandoulas, J Sedgbeer, S Yarker, C Youngman, RJ Barlow, I Brock, RJ Cashmore, R Devenish, P Grossmann, J Illingworth, M Ogg, B Roe, GL Salmon, T Wyatt, KW Bell, B Foster, JC Hart, J Proudfoot, DR Quarrie, DH Saxon, PL Woodworth, Y Eisenberg, U Karshon, D Revel, E Ronat, A Shapira, J Freeman, P Lecomte, T Meyer, SL Wu, G Zobernig

Abstract:

We have observed τ production in e+e- annihilation at centre-of-mass energies between 12 and 31.6 GeV with cross sections in agreement with the QED τ-pair cross section. Branching ratios for τ decay have been measured and are consistent with the world averages. We have determined the cutoff parameters of QED Λ+ (Λ-) to be > 73 GeV (82 GeV) and have obtained an upper limit on the τ lifetime of 1.4 × 10-12 s(95% CL). © 1980.
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Rapid growth of charged particle multiplicity in high energy e+e- annihilations

Physics Letters B 89:3-4 (1980) 418-422

Authors:

R Brandelik, W Braunschweig, K Gather, V Kadansky, K Lübelsmeyer, P Mättig, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, AS von Dratzig, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, P Leu, B Löhr, R Wedemeyer, N Wermes, M Wollstadt, DG Cassel, D Heyland, H Hultschig, P Joos, W Koch, P Koehler, U Kötz, H Kowalski, A Ladage, D Lüke, HL Lynch, G Mikenberg, D Notz, J Pyrlik, R Riethmüller, M Schliwa, P Söding, BH Wiik, G Wolf, R Fohrmann, M Holder, G Poelz, J Ringel, O Römer, R Rüsch, P Schmüser, DM Binnie, PJ Dornan, NA Downie, DA Garbutt, WG Jones, SL Lloyd, D Pandoulas, A Pevsner, J Sedgbeer, S Yarker, C Youngman, RJ Barlow, RJ Cashmore, J Illingworth, M Ogg, B Roe, GL Salmon, KW Bell, W Chinowsky, B Foster, JC Hart, J Proudfoot, DR Quarrie, DH Saxon, PL Woodworth, Y Eisenberg, U Karshon, D Revel, E Ronat, A Shapira, J Freeman, P Lecomte, T Meyer, Sau Lan Wu, G Zobernig

Abstract:

Hadron production by e+e- annihilation has been studied for c.m. energies W between 13 and 31.6 GeV. As a function of 1n W the charged particle multiplicity grows faster at high energy than at lower energies. This is correlated with a rise in the plateau of the rapidity distribution. The cross section sdσ/dx is found to scale within ±30% for x > 0.2 and 5 ≤ W ≤ 31.6 GeV. © 1980.
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Multichannel analysis of the reaction K-p→K0π-p at 4.2 GeV/c

Nuclear Physics, Section B 167:1-2 (1980) 61-97

Authors:

JJ Engelen, PM Heinen, EW Kittel, WJ Metzger, DJ Schotanus, JSM Vergeest, M Zrałek, B Jongejans, GGG Massaro, C Dionisi, A Ferrando, P Gavillet, P Loverre, M Mazzucato, B Foster, P Grossmann, J Wells

Abstract:

An analysis is presented of the reaction K-p→K0π-p at 4.2 GeV/c incident momentum, using analytical techniques in fully dimensional phase space. This methods allows to isolate the contributions of the 0+, 1- and 2+ (Kπ) partial waves in various helecity Separating well-understood contributions from the rest, the method is particularly useful for the detection of small effects (≈1% of the total final-state cross section) not visible in the mass distributions: (i) small cross-section contributions of 3- (Kπ partial waves, K*(1780), are unambiguously isolated; (ii) 3.5σ evidence is given for Σ(1480) in the (pK0) system; (iii) effects due to a second Kπ P-wave or the possible presence of a doubly peripheral mechanism are discussed. The method furthermore allows simultaneous treatment of the (Kπ) partial waves, pπ) partial waves and their interferences and of a Σ(1765) signal (with spin 5 2). While interferences within the (Kπ) and within the (pπ) systems are strongly determining the corresponding distributions, no interference between these systems is needed. © 1980.
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e+ e- annihilation at high energies and search for the t-quark continuum contribution

Zeitschrift für Physik C Particles and Fields 4:2 (1980) 87-93

Authors:

R Brandelik, W Braunschweig, K Gather, V Kadansky, K Lübelsmeyer, P Mättig, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, A Schultz von Dratzig, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, P Leu, B Löhr, R Wedemeyer, N Wermes, M Wollstadt, DG Cassel, D Heyland, H Hultschig, P Joos, W Koch, P Koehler, U Kötz, H Kowalski, A Ladage, D Lüke, HL Lynch, G Mikenberg, D Notz, J Pyrlik, R Riethmüller, M Schliwa, P Söding, BH Wiik, G Wolff, R Fohrmann, M Holder, G Poelz, J Ringel, O Römer, R Rüsch, P Schmüser, DM Binnie, PJ Dornan, NA Downie, DA Garbutt, WG Jones, SL Lloyd, D Pandoulas, A Pevsner, J Sedgbeer, S Yarker, C Youngman, RJ Barlow, RJ Cashmore, J Illingworth, M Ogg, B Roe, GL Salmon, KW Bell, W Chinowsky, B Foster, JC Hart, J Proudfoot, DR Quarrie, DH Saxon, PL Woodworth, Y Eisenberg, U Karshon, D Revel, E Ronat, A Shapira, J Freeman, P Lecomte, T Meyer, SL Wu, G Zobernig

Abstract:

Measurements of R, sphericity and thrust are presented for c.m. energies between 12 and 31.6 GeV. A possible contribution of a t {Mathematical expression} continuum can be ruled out for c.m. energies between 16 and 31 GeV. © 1980 Springer-Verlag.
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