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Re: eta_c with event mixing for STT [message #12635 is a reply to message #12584] Thu, 08 September 2011 02:48 Go to previous message
Dima Melnychuk is currently offline  Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...
first-grade participant
From: 140.181.10*
Hi all,

With the latest run eta_c events produced with STT with background mixing are reconstructable.

Multiplicity of reconstructed tracks is rather high:

index.php?t=getfile&id=6627&private=0

With rough pre-selection on phi mass invariant mass distributions looks like:

index.php?t=getfile&id=6628&private=0

So there is small indication of eta_c peak.

But after the final selection:

index.php?t=getfile&id=6629&private=0

eta_c is reconstructed with efficiency 3.3%

Dima
 
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