1. Atmospheric Neutrino Software Update Andy Blake Cambridge University Thursday December 7 th 2006

2. AtNu Ntuples Andy Blake, Cambridge UniversityAtNu Software Talk, slide 2 Contained vertex atmospheric neutrino analysis carried out using AtNu Ntuples. – Ntuple classes in AtNuEvent package (class structure right). – Ntuples filled using NtpMaker module in AtNuOutput package. – Documentation in doc-db #2361. – Event display and analysis tools provided by AtNuUtils package. [B. Speakman].

3. AtNuUtils Event Display

4. AtNu Short Ntuples Andy Blake, Cambridge UniversityAtNu Software Talk, slide 4 AtNuAna package in CVS distills important physics analysis variables from AtNu Ntuples into lightweight ROOT ntuples. – no dependencies other than on ROOT itself. Information contained in short ntuples: Reconstruction Every reconstructed track. Overall shower information. Summary of strip information. Summary of veto shield information. Data/MC Basic event information. Data quality monitoring. Beam monitoring. MC truth. Event Selection Event topology variables. Event kinematics variables. Event selection variables. Event Type Event Containment (FC/PC). Event Direction (UP/DN). Cosmic Muon. Multiple Muon. Beam Spill.

5. AtNu Short Ntuples Andy Blake, Cambridge UniversityAtNu Software Talk, slide 5 Have generated AtNu short ntuples for all far detector data between August 1 st 2003 and February 28 th 2006. – 40M events. – 600Mb/month. Enables easy introduction to far detector physics analyses. – Atmospheric neutrinos. – Upward-going muons. – Cosmic-ray muons. – Beam neutrinos. See http://www.hep.phy.cam.ac.uk/minos/atnu_ntuples/