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Production of KK-pairs in photon-photon collisions and the excitation of the tensor meson f′(1515)

Physics Letters B 121:2-3 (1983) 216-222

Authors:

M Althoff, R Brandelik, W Braunschweig, K Gather, FJ Kirschfink, K Lübelsmeyer, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, H Siebke, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, L Köpke, H Kolanoski, H Kück, R Wedemeyer, N Wermes, M Wollstadt, H Burkhardt, S Cooper, J Franzke, D Hochman, H Hultschig, P Joos, W Koch, U Kötz, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, KH Mess, D Notz, J Pyrlik, DR Quarrie, R Riethmüller, W Schütte, P Söding, G Wolf, G Yekutieli, R Fohrmann, HL Krasemann, P Leu, E Lohrmann, D Pandoulas, G Poelz, P Schmüser, BH Wiik, I Al-Agil, R Beuselinck, DM Binnie, AJ Campbell, PJ Dornan, B Foster, DA Garbutt, TD Jones, WG Jones, J McCardle, JK Sedgebeer, KW Bell, MG Bowler, IC Brock, RJ Cashmore, R Carnegie, PEL Clarke, R Devenish, P Grossmann, J Illingworth, SL Lloyd, GL Salmon, J Thomas, TR Wyatt, C Youngman, JC Hart, J Harvey, J Proudfoot, DH Saxon, PL Woodworth, D Heyland, M Holder, E Duchovni, Y Eisenberg, U Karshon, G Mikenberg, D Revel, E Ronat, A Shapira, T Barklow, M Cherney, T Meyer, G Rudolph, H Venkataramania

Abstract:

We have observed exclusive production of K+K- and KSOKSO pairs and the excitation of the f′(1515) tensor meson in photon-photon collisions. Assuming the f′ to be production in a helicity 2 state, we determine Λ(f′ → γγ) B(f′ → KK) = 0.11 ± 0.02 ± 0.04 keV. The non-strange quark of the f′ is found to be less than 3% (95% CL). For the θ(1640) we derive an upper limit for the product Λ(θ rarr; γγ KK) < 0.03 keV (95% CL). © 1983.
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Evidence for double φ production in the reaction K−p → φφΛ/Σ0 at 18.5 GeV/c

Physics Letters B Elsevier 121:1 (1983) 83-86

Authors:

Bari-Birmingham-CERN-LPNHE Paris-Milan-Pavia Collaboration, T Armstrong, M Baubillier, W Beusch, IJ Bloodworth, D Bortoletto, JC Brient, A Burns, E Calligarich, JN Carney, C Evangelista, B Ghidini, JB Kinson, K Knudson, V Lenti, G Liguori, L Mandelli, F Navach, A Palano, L Perini, Y Pons, E Quercigh, Z Strachman, M Tamborini, MF Worsell, G Zito, R Zitoun
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DSTAR+/- PRODUCTION BY E+E- ANNIHILATION NEAR 34.4 GEV CM ENERGY

PHYSICS LETTERS B 126:6 (1983) 493-498

Authors:

M ALTHOFF, W BRAUNSCHWEIG, K GATHER, FJ KIRSCHFINK, K LUBELSMEYER, HU MARTYN, G PEISE, J RIMKUS, HG SANDER, D SCHMITZ, H SIEBKE, D TRINES, W WALLRAFF, HM FISCHER, H HARTMANN, E HILGER, W HILLEN, G KNOP, L KOPKE, H KOLANOSKI, H KUCK, R WEDEMEYER, N WERMES, M WOLLSTADT, H BURKHARDT, H HULTSCHIG, P JOOS, W KOCH, U KOTZ, H KOWALSKI, A LADAGE, B LOHR, D LUKE, P MATTIG, KH MESS, D NOTZ, J PYRLIK, D QUARRIE, R RIETHMULLER, AM RUSHTON, W SCHUTTE, G WOLF, G YEKUTIELI, R FOHRMANN, HL KRASEMANN, P LEU, E LOHRMANN, D PANDOULAS, G POELZ, BH WIIK, I ALAGIL, R BEUSELINCK, DM BINNIE, AJ CAMPBELL, PJ DORNAN, B FOSTER, DA GARBUTT, TD JONES, WG JONES, J MCCARDLE, JK SEDGBEER, KW BELL, MG BOWLER, IC BROCK, RJ CASHMORE, PEL CLARKE, R DEVENISH, P GROSSMANN, SL LLOYD, GL SALMON, J THOMAS, TR WYATT, C YOUNGMAN, JC HART, J HARVEY, J PROUDFOOT, DH SAXON, PL WOODWORTH, D HEYLAND, M HOLDER, M DITTMAR, E DUCHOVNI, Y EISENBERG, D HOCHMAN, U KARSHON, G MIKENBERG, R MIR, D REVEL, E RONAT, A SHAPIRA, T BARKLOW, M CHERNEY, JM IZEN, G RUDOLPH, D STROM, H VENKATARAMANIA, E WICKLUND, SL WU, G ZOBERNIG
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Electroweak coupling constants in the leptonic reactions e+e- → e+e- and e+e- → μ+μ- and search for scalar leptons

Physics Letters B 117:5 (1982) 365-371

Authors:

R Brandelik, W Braunschweig, K Gather, FJ Kirschfink, K Lübelsmeyer, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, L Köpke, H Kolanoski, R Wedemeyer, N Wermes, M Wollstadt, H Burkhardt, S Cooper, J Franzke, D Heyland, H Hultschig, P Joos, W Koch, U Kötz, H Kowalski, A Ladage, B Löhr, D Lüke, HL Lynch, P Mättig, KH Mess, D Notz, J Pyrlik, DR Quarrie, R Riethmüller, W Schütte, P Söding, G Wolf, R Fohrmann, HL Krasemann, P Leu, E Lohrmann, D Pandoulas, G Poelz, O Römer, P Schmüser, BH Wiik, I Al-Agil, R Beuselinck, DM Binnie, AJ Campbell, PJ Dornan, DA Garbutt, TD Jones, WG Jones, SL Lloyd, JK Sedgbeer, KW Bell, MG Bowler, IC Brock, RJ Cashmore, R Carnegie, PEL Clarke, R Devenish, P Grossmann, J Illingworth, M Ogg, GL Salmon, J Thomas, TR Wyatt, C Youngman, B Foster, JC Hart, J Harvey, J Proudfoot, DH Saxon, PL Woodworth, M Holder, E Duchovni, Y Eisenberg, U Karshon, G Mikenberg, D Revel, E Ronat, A Shapira, T Barklow, T Meyer, G Rudolph, E Wicklund, Sau Lan Wu, G Zobernig

Abstract:

A high statistics experiment was performed on Bhabha scattering at energies between 14 and 34 GeV. Good agreement with QED was observed. The combined data on Bhabha scattering and μ pair production were found to agree with the standard theory of electroweak interaction giving sin2 θ = 0.27-0.07+0.06. Assuming for the Z0 mass a value of 90 GeV the leptonic weak coupling constants were determined to gV2 = -0.04 ± 0.06 and gA2 = 0.35 ± 0.09. A search for scalar leptons sets lower limits on the mass of scalar electrons ofMse > 16.6 GeV and of scalar muons of Msμ > 16.4 GeV. © 1982.
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Inclusive ϱ0 production in e+e- annihilation at high energy

Physics Letters B 117:1-2 (1982) 135-140

Authors:

R Brandelik, W Braunschweig, K Gather, FJ Kirschfink, K Lübelsmeyer, HU Martyn, G Peise, J Rimkus, HG Sander, D Schmitz, H Siebke, D Trines, W Wallraff, H Boerner, HM Fischer, H Hartmann, E Hilger, W Hillen, G Knop, L Köpke, H Kolanoski, R Wedemeyer, N Wermes, M Wollstadt, H Burkhardt, S Cooper, J Franzke, D Heyland, H Hultschig, P Joos, W Koch, U Kötz, H Kowalski, A Ladage, B Löhr, D Lüke, HL Lynch, P Mättig, KH Mess, D Notz, J Pyrlik, DR Quarrie, R Riethmüller, W Schütte, P Söding, G Wolf, M Dittmar, R Fohrmann, HL Krasemann, P Leu, E Lohrmann, D Pandoulas, G Poelz, O Römer, P Schmüser, BH Wiik, I Al-agil, R Beuselinck, DM Binnie, AJ Campbell, PJ Dornan, DA Garbutt, TD Jones, WG Jones, SL Lloyd, JK Sedgbeer, R Stern, KW Bell, MG Bowler, IC Brock, RJ Cashmore, R Carnegie, PEL Clarke, R Devenish, P Grossmann, J Illingworth, GL Salmon, J Thomas, TR Wyatt, C Youngman, B Foster, JC Hart, J Harvey, J Proudfoot, DH Saxon, PL Woodworth, M Holder, E Duchovni, Y Eisenberg, U Karshon, G Mikenberg, D Revel, E Ronat, A Shapira, T Barklow, T Meyer, G Rudolph, E Wicklund, SL Wu, G Zobernig

Abstract:

We have observed ρ{variant}0 production in e+e- annihilation to hadrons at high energies. The differential cross section at a centre of mass energy W, of 34 GeV, is presented. In the range 0.2< x < 0.7, we measure 0.33 ± 0.06 (stat.) ± 0.07 (syst.), 0.22 ± 0.06 ± 0.05 and 0.22 ± 0.02 ± 0.05 ρ{variant}0/event at W = 14, 22 and 34 GeV respectively. © 1982.
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