The P-326 run in year 2007

CERN has approved a P-326 run from June 2007 to October 2007 at the Super-Proton Synchrotron in order to collect 150,000 Ke2 events with the P-326 (formerly NA48) apparatus.

The expected background contamination (due to Kmu2 decays) in the Ke2 sample is 6.2%, the background being concentrated in the kinematic region of high momentum of the reconstructed track (above 40 GeV/c). A crucial element for background subtraction is muon identification by the E/P ratio. The E/P spectrum of muons will be measured 1) with a sample of pure muons selected using a lead plate placed in fromt of the second HOD plane covering ~20% of the geometric acceptance; 2) with a sample of pure muons selected using Kmu2 decay kinematics at low track momentum.

  • P326 Lead Wall (2007 Run):


Shift list for run 2007 New


SPS Page 1

Run Coordinators

  • Riccardo Fantechi
  • Silvia Goy Lopez
  • Rainer Wanke


Analysis Page

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I Attachment History Action Size Date Who Comment
PNGpng lead_wall2007.png r1 manage 81.9 K 2007-04-30 - 12:38 GianlucaLamanna P326 Lead Wall (2007 Run)
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Topic revision: r15 - 2008-02-13 - BjornHallgren

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