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Re: No back propagation to IP for V_0 reconstruction [message #17627 is a reply to message #17626] Thu, 04 December 2014 11:07 Go to previous messageGo to previous message
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: *to.infn.it
For the invariant mass distribution you need to know the production vertex, then you need to use a vertex fitter.

For the k0 vertex, I suppose you use MC information (right)?. I am not able to undertand distance/gammabeta, just distance could help. But if the counts are the same, in your comparison there sould be something wrong, because the plot means that the k0 moved from production point close to the IP (w/ back propagation) towards the external part (w/o), and this is not possible, Are you sure you are taking the distance/gamma/beta from the proper place?



 
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