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Re: eta_c with event mixing for STT [message #12603 is a reply to message #12584] Fri, 02 September 2011 11:37 Go to previous messageGo to previous message
Dima Melnychuk is currently offline  Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...
first-grade participant
From: *fuw.edu.pl
Dear colleagues,

Here I update plots on eta_c reconstruction with STT and event mixing with runs mix301, mix311, mix321, mix331.

There is an improvement comparing to previous results but the results are still far from reasonable.

Multiplicity of charged tracks:
index.php?t=getfile&id=6615&private=0

23% of events have >=4 tracks in comparing to 8% in previous run and 72% without event mixing.

And invariant mass of phi and eta_c with preselection on phi mass window:
index.php?t=getfile&id=6616&private=0

Here phi peak appears but still no indication of eta_c peak.

Finally 36 events were reconstructed from 100 k.

Dima
  • Attachment: n_charged.png
    (Size: 12.26KB, Downloaded 252 times)
  • Attachment: m_nocuts.png
    (Size: 13.50KB, Downloaded 272 times)
 
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