SEARCH FOR DECAYS OF THE W+/-BOSONS AND Z-BOSONS INTO QUARK ANTIQUARK PAIRS

SEARCH FOR DECAYS OF THE W+/-BOSONS AND Z-BOSONS INTO QUARK ANTIQUARK PAIRS

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 optim...

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Bibliographic Details
Main Authors: Ansari, R, Bagnaia, P, Banner, M, Battiston, R, Bernlohr, K, Booth, C, Borer, K, Borghini, M, Carboni, G, Cavasinni, V, Cenci, P, Chollet, J, Clark, A, Conta, C, Corona, C, Costantini, F, Darriulat, P, Delotto, B, Delprete, T, Dilella, L, Dineshansen, J, Einsweiler, K, Fayard, L, Ferrari, R, Fraternali, M
Format: Journal article
Language:English
Published: 1987
Description
Summary: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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