3 research outputs found

    Cryogenic technology for tracking detectors

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    A low-mass cryogenic cooling technique for silicon sensor modules has been developed in the framework of the RD39 Collaboration at CERN. A prototype low-mass beam tracker cryostat has been designed, constructed and tested for applications in fixed target experiments. We shall report here briefly the main features and results of the system

    Study of hadronic event-shape variables in multijet final states in pp collisions at (s)\sqrt(s) =7 TeV

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    Event-shape variables, which are sensitive to perturbative and nonperturbative aspects of quantum chromodynamic (QCD) interactions, are studied in multijet events recorded in proton-proton collisions at s = 7 s&#8730;=7 TeV. Events are selected with at least one jet with transverse momentum p T > 110 GeV and pseudorapidity | &#951; | < 2.4, in a data sample corresponding to integrated luminosities of up to 5 fb &#8722;1 . The distributions of five event-shape variables in various leading jet p T ranges are compared to predictions from different QCD Monte Carlo event generators
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