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Search for decays of the W± and Z bosons into quark-antiquark pairs

Physics Letters B 186:3-4 (1987) 452-460

Authors:

R Ansari, P Bagnaia, M Banner, R Battiston, K Bernlöhr, C Booth, K Borer, M Borghini, G Carboni, V Cavasinni, P Cenci, JC Chollet, AG Clark, C Conta, C Corona, F Costantini, P Darriulat, B De Lotto, T Del Prete, L Dilella, J Dines-Hansen, K Einsweiler, L Fayard, R Ferrari, M Fraternali, D Froidevaux, JM Gaillard, O Gildemeister, VG Goggi, C Gössling, B Hahn, H Hanni, JR Hansen, P Hansen, K Hara, N Harnew, E Hugentobler, E Iacopini, L Iconomidou-Fayard, K Jakobs, P Jenni, EE Kluge, O Kofoed-Hansen, S Lami, E Lançon, P Lariccia, M Livan, S Loucatos, B Madsen, B Mansoulié, GC Mantovani, L Mapelli, K Meier, B Merkel, R Möllerud, M Moniez, R Moning, M Morganti, C Onions, MA Parker, G Parrour, F Pastore, M Pepe, C Petridou, H Plothow-Besch, M Polverel, L Rasmussen, JP Repellin, A Rimoldi, A Roussarie, V Ruhlmann, G Sauvage, J Schacher, S Stapnes, F Stocker, M Swartz, J Teiger, WY Tsang, M Valdata-Nappi, V Vercesi, AR Weidberg, M Wunsch, H Zaccone

Abstract:

The invariant mass distribution of jet pairs observed in the UA2 central calorimeter is examined in the search for an excess of events in the region of the W± and Z bosons, which would reveal their decays into quark-antiquark pairs. We give a detailed account of the methods of analysis used to optimize the mass resolution achieving ≅±10%. A structure is observed at the level of ≅ 3 standard deviations in the mass region of W± and Z with shape and position consistent with expectation from their qq̄decays. It contains 632 ± 190 events, 1.4 standard deviations above the standard model prediction of 340 ± 80 events. © 1987.
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Measurement of the structure functions F2 and xF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects

Zeitschrift Fur Physik C Particles and Fields 36:1 (1987) 1-13

Authors:

K Varvell, AM Cooper-Sarkar, MA Parker, RA Sansum, M Aderholz, N Armenise, JP Baton, FW Bullock, M Berggren, D Bertrand, V Brisson, W Burkot, M Calcchio, EF Claytoh, T Coghen, O Erriquez, PJ Fitch, G Gerbier, J Guy, PO Hulth, G Iaselli, GT Jones, P Kasper, H Klein, C Kochowski, P Marage, M Mermikides, RP Middleton, DRO Morrison, MM Mobayyen, S Natali, M Neveu, S Nuzzo, SW O'Neale, P Petiau, A Petrides, F Ruggieri, J Sacton, E Simopoulou, C Vallee, A Vayaki, WA Venus, H Wachsmuth, J Wells, W Wittek

Abstract:

The isoscalar nucleon structure functions F2(x, Q2) and xF3(x, Q2) are measured in the range 02<64 GeV2, 1.72<250 GeV2, x<0.7 using ν and {Mathematical expression} interactions on neon in BEBC. The data are used to evaluate possible higher twist contributions and to determine their impact on the evaluation of the QCD parameter Λ. In contrast to previous analyses reaching to such low W2 values, it is found that a low {Mathematical expression} value in the neighbourhood of 100 MeV describes the data adequately and that the contribution of dynamical higher twist effects is small and negative. © 1987 Springer-Verlag.
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High transverse momentum π0 production by π− and π+ on protons at 280 GeV/c

Zeitschrift für Physik C Particles and Fields Springer Nature 37:1 (1987) 39-50

Authors:

WA70-Collaboration, M Bonesini, E Bonvin, PSL Booth, D Bortoletto, LJ Carroll, AJ Cass, D Cavalli, G Costa, M Donnat, PA Dorsaz, DN Edwards, JR Fischer, L Fluri, D Frame, F Gianotti, S Jack, JN Jackson, M Kelly, MN Kienzle-Focacci, R Lucock, JG Lynch, L Mandelli, M Martin, L Mathys, A Maxwell, M Mazzanti, JJ Myerscough, PJ Negus, S Pensotti-Rancoita, L Perini, D Perrin, G Polesello, WH Range, L Rosselet, SW Snow, M Tamborini, AS Thompson, RM Turnbull, J Wells, M Werlen
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Search for magnetically charged particles produced in e+e- annihilations at √s =10.6 GeV

Physical Review D American Physical Society (APS) 35:3 (1987) 1081-1084

Authors:

T Gentile, P Haas, M Hempstead, T Jensen, H Kagan, R Kass, S Behrends, Jan M Guida, Joan A Guida, F Morrow, R Poling, EH Thorndike, P Tipton, MS Alam, N Katayama, IJ Kim, CR Sun, V Tanikella, D Bortoletto, A Chen, L Garren, M Goldberg, R Holmes, N Horwitz, A Jawahery, P Lubrano, GC Moneti, V Sharma, SE Csorna, MD Mestayer, RS Panvini, GB Word, A Bean, GJ Bobbink, IC Brock, A Engler, T Ferguson, RW Kraemer, C Rippich, H Vogel, C Bebek, K Berkelman, E Blucher, DG Cassel, T Copie, R DeSalvo, JW DeWire, R Ehrlich, RS Galik, MGD Gilchriese, B Gittelman, SW Gray, AM Halling, DL Hartill, BK Heltsley, S Holzner, M Ito, J Kandaswamy, R Kowalewski, DL Kreinick, Y Kubota, NB Mistry, J Mueller, R Namjoshi, E Nordberg, M Ogg, D Perticone, D Peterson, M Pisharody, K Read, D Riley, A Silverman, S Stone, Xia Yi, AJ Sadoff, P Avery, D Besson, T Bowcock, RT Giles, J Hassard, K Kinoshita, FM Pipkin, Richard Wilson, JP Wolinski, D Xiao
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Study of π+π- transitions from the Υ(3S)

Physical Review Letters American Physical Society (APS) 58:4 (1987) 307-310

Authors:

T Bowcock, RT Giles, J Hassard, K Kinoshita, FM Pipkin, Richard Wilson, J Wolinski, D Xiao, T Gentile, P Haas, M Hempstead, T Jensen, H Kagan, R Kass, S Behrends, Jan M Guida, Joan A Guida, F Morrow, R Poling, EH Thorndike, P Tipton, MS Alam, N Katayama, IJ Kim, CR Sun, V Tanikella, D Bortoletto, A Chen, L Garren, M Goldberg, R Holmes, N Horwitz, A Jawahery, P Lubrano, GC Moneti, V Sharma, SE Csorna, MD Mestayer, RS Panvini, GB Word, A Bean, GJ Bobbink, IC Brock, A Engler, T Ferguson, RW Kraemer, C Rippich, H Vogel, C Bebek, K Berkelman, E Blucher, DG Cassel, T Copie, R DeSalvo, JW DeWire, R Ehrlich, RS Galik, MGD Gilchriese, B Gittelman, SW Gray, AM Halling, DL Hartill, BK Heltsley, S Holzner, M Ito, J Kandaswamy, R Kowalewski, DL Kreinick, Y Kubota, NB Mistry, J Mueller, R Namjoshi, E Nordberg, M Ogg, D Perticone, D Peterson, M Pisharody, K Read, D Riley, A Silverman, S Stone, Xia Yi, AJ Sadoff, P Avery, D Besson
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