18 research outputs found

    ATLAS detector and physics performance: Technical Design Report, 1

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    PII: 0370-2693(87)90325-X

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    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 qft decays. It contains 632 + 190 events, 1.4 standard deviations above the standard model prediction of 340 + 80 events. On leave from Scuola Norrnal
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