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Re: Update on eta_c reconstruction with STT and TPC [message #12402 is a reply to message #12112] Sat, 30 July 2011 12:09 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: *play-internet.pl
Hi Lia,

Looking on the number of counts in eta_c peak with 80 vs 8000, I can add that number of analysed events is 2000 vs 100k. So drop of efficiency by factor 2 appears already on this level.

And concerning the error at lower statistics (calculating it as a square root of number of reconstructed eta_c) it' about 1%, i.e. 15+/-1 % vs 23%. So the numbers are not really compatible within errors, (may be it's just a matter of fluctuation).

> The grid sample has been simulated in the july11 release, right?

Yes.

By monday I will try to calculate a litle bit higher statistics, i.e. 5000 events. And here I have a question to Gianluigi if I should update the code to his commit from yesterday night?

Dima
 
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