48,108 research outputs found

    Big Ramsey degrees and divisibility in classes of ultrametric spaces

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    Given a countable set S of positive reals, we study finite-dimensional Ramsey-theoretic properties of the countable ultrametric Urysohn space with distances in S.Comment: 12 page

    First results of the SDHCAL technological prototype

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    The CALICE Semi-digital hadronic calorimeter built in 2011, was installed and tested during two periods of two weeks each in 2012 at CERN SPS facilities. The detector has more than 450000 channels with a semi-digital readout distributed on 48 layers with efficiency exceeding 95%. It has been run using the trigger-less and power pulsing modes. Data have been collected with muon, electron and hadron beams in the energy range between 5 and 80 GeV. This contribution focuses on the performances, the shower selection methods and on the first results on the calibration using pions.Comment: Proceeding of the CHEF 2013 (Calorimetry for the High Energy Frontier) International conference, Eds J,-C Brient, R. Salerno, and Y. Sirois, ISBN number 978-2-7302-1624-1. year 2013, 1-488 page
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