GSI Forum: EMC » Correlation with charged tracks

Home » PANDA » PandaRoot » EMC » Correlation with charged tracks

Show: Today's Messages :: Polls :: Message Navigator

Correlation with charged tracks [message #17664]

Wed, 17 December 2014 21:43

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *ip71.fastwebnet.it

Dear all,
after several discussions at the last collaboration meeting, I checked the correlation of charged tracks with EMC.
I simulated the standard psi(3680)-> J/psi pi+ pi-, and checked the distribution of sqrt(EMC quality) -> the distance between the coordinates of the EMC bumps and the coordinated of the extrapolated point from the track to EMC (in cm):

index.php?t=getfile&id=8218&private=0

As you can see the residual has a width of around 1cm, comparable to the size of the emc crystals. There is some systematic inside since the coordinates of the EMC cluster are inside the crystal and not at the front face, but I would say inside error bars.
I checked running 2 iterations of the Kalman Filter (in red), but the distributions are pretty the same.

I cannot see from this plot any problem of quality of extrapolated tracks. Everything seems fine.

Attachment: emc_quality.gif
(Size: 7.69KB, Downloaded 1257 times)

Report message to a moderator

Previous Topic:	Emc error matrix
Next Topic:	Cut in energy for EMC hit and digi

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Mon Feb 02 23:05:10 CET 2026

Total time taken to generate the page: 0.00787 seconds