| Finding true vertex position of mother particles. [message #12101] |
Mon, 20 June 2011 22:49  |
donghee
Messages: 385
Registered: January 2009
Location: Germnay
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first-grade participant |
From: *dip.t-dialin.net
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Hi pandausers,
I'm trying to see true vertex position for psi3770 -> D+D- ->KpipiKpipi.
I have PndMCtracks and I don't have mother vertex ID.
At gridka, the signal data didn't contain mother particle info. as I correctly understand.
Simply I have only 6 charged outgoind tarcks with true 4-momentum.
From each three outgoing tracks, I can build intermediate state D+ or D- and can find first D+ or D- vertex position via.
| Quote: |
PndMCTrack *mctrack=(PndMCTrack*)mc_array->At(mc);
TVector3 vertex = (TVector3)mctrack->GetStartVertex();
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Then now, I want to provide the vertex position for psi3770 from 4-momentum and vertex position of D+ and D-.
How can I get true vertex position only from PndMCtrack?
I assume that I need to build a TCandidate for true D+ and D-,
then I can get further mother decay.
Is there easy way to do with Rho package?
Thank you for your teaching....
Best wishes,
Donghee
[Updated on: Mon, 20 June 2011 22:52] Report message to a moderator |
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