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Re: Problem with mass constraint fit for two gamma [message #17036 is a reply to message #17033] Wed, 16 July 2014 20:28
 donghee Messages: 385Registered: January 2009 Location: Germnay first-grade participant From: *dip0.t-ipconnect.de
Dear Stefano,

Thanks a lot.
I submit a job with this new EMC reconstruction part.

Probably, I focused on the wrong direction before getting your e-mail.
You can see what I was suspicious about and discussion with Dima at today morning.

See you soon,

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Hi Dima,

I am produing emc data(photon) to get error matrices according current geometries.
Everythings is more or less smooth.

I found that the position resolution of backward endcap are really bad, if I compare with forward end cap.

I assume that our main problem is the scaleing factor in the PndEmcErrorMatrix.cxx
We are calculating the position error at z or R=100cm when we estimate errors and save it from the analysing photon data.
Then in PndEmcErrorMatrix we make a rescale with 54/100*error, which 54 is the radius of barrel for example and 100 is previouly given in the error matrix data that have to be subtracted during the access this information at analysis (fit) level.

But I think that this is something wrong. we don't need any scale factor. All error are estimated by differences at certain position.
It has been already taken into account during transformation in which is TMatrix trans(4,3).

I am trying to do with following way.
In PndEmcErrorMatrix, I change
from
pos1Err *=scaleFactor
pos2Err *=scaleFactor

to
pos1Err *=1/100
pos2Err *=1/100

let see what should happen.
Donghee
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 [FIXED] Problem with mass constraint fit for two gamma By: donghee on Mon, 30 June 2014 10:56 Re: Problem with mass constraint fit for two gamma By: Lu Cao on Mon, 30 June 2014 16:51 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Mon, 30 June 2014 17:51 Re: Problem with mass constraint fit for two gamma By: donghee on Tue, 01 July 2014 10:12 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Tue, 01 July 2014 10:24 Re: Problem with mass constraint fit for two gamma By: donghee on Tue, 01 July 2014 10:35 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Tue, 01 July 2014 10:37 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Tue, 01 July 2014 11:06 Re: Problem with mass constraint fit for two gamma By: donghee on Tue, 01 July 2014 14:17 Re: Problem with mass constraint fit for two gamma By: Lu Cao on Thu, 17 July 2014 13:20 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Thu, 17 July 2014 13:34 Re: Problem with mass constraint fit for two gamma By: donghee on Tue, 01 July 2014 10:57 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Tue, 01 July 2014 10:59 Re: Problem with mass constraint fit for two gamma By: donghee on Tue, 01 July 2014 11:08 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Tue, 01 July 2014 11:58 Re: Problem with mass constraint fit for two gamma By: donghee on Wed, 02 July 2014 11:57 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Wed, 02 July 2014 12:01 Re: Problem with mass constraint fit for two gamma By: donghee on Wed, 02 July 2014 12:28 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Wed, 02 July 2014 13:24 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Wed, 02 July 2014 12:26 Re: Problem with mass constraint fit for two gamma By: donghee on Thu, 03 July 2014 00:29 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Thu, 03 July 2014 13:29 Re: Problem with mass constraint fit for two gamma By: donghee on Thu, 03 July 2014 23:57 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Fri, 04 July 2014 11:23 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Sun, 06 July 2014 06:09 Re: Problem with mass constraint fit for two gamma By: donghee on Mon, 07 July 2014 11:04 Re: Problem with mass constraint fit for two gamma By: Dima Melnychuk on Mon, 07 July 2014 11:13 Re: Problem with mass constraint fit for two gamma By: donghee on Mon, 07 July 2014 13:54 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Mon, 07 July 2014 14:03 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Wed, 16 July 2014 17:49 Re: Problem with mass constraint fit for two gamma By: donghee on Wed, 16 July 2014 20:28 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Wed, 16 July 2014 22:56 Re: Problem with mass constraint fit for two gamma By: donghee on Thu, 17 July 2014 10:29 Re: Problem with mass constraint fit for two gamma By: StefanoSpataro on Thu, 17 July 2014 10:34 Re: Problem with mass constraint fit for two gamma By: donghee on Thu, 17 July 2014 10:59
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