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point of closest approach [message #9036]

Wed, 22 July 2009 16:08

I. Atar
Messages: 6
Registered: July 2009

occasional visitor

From: *ikp.kfa-juelich.de

hi all,

I try to reconstruct the mass and decay length of single lambdas with LheTrack. somebody tell me please ,how I can get information about the points, which the tracks of proton and pi- are closest.

best regards,
leila

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Re: point of closest approach [message #9037 is a reply to message #9036]

Wed, 22 July 2009 16:31

Sebastian Neubert
Messages: 282
Registered: March 2006
Location: Munich

first-grade participant

From: *natpool.mwn.de

Hi!

I have done Lamba reconstruction with the genfit tools already quite some time ago. In the recotask package there is the LambdaSelector for this. I do not know if it survived the recent changes to genfit but it certainly would be a starting point. If you could develop it into a fully functional tool that would be great!

Cheers! Sebastian.

Sebastian Neubert
Technische Universität München
Department Physik E18
sneubert@e18.physik.tu-muenchen.de
tel: +49-8928912592

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Re: point of closest approach [message #9041 is a reply to message #9037]

Thu, 23 July 2009 11:43

I. Atar
Messages: 6
Registered: July 2009

occasional visitor

From: *ikp.kfa-juelich.de

Hi,

thanks a lot, i will try this.

best regards
leila

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Re: point of closest approach [message #9071 is a reply to message #9037]

Fri, 24 July 2009 18:19

I. Atar
Messages: 6
Registered: July 2009

occasional visitor

From: *ikp.kfa-juelich.de

Hi Sebastian,

I try to use Lambdaselector, but at the beginning I have problem with the input file PndMicroCandidate. First the following line

TTree *t1=inFile1->Get("cbmsim") ;
TClonesArray *fTr = new TClonesArray("PndMicroCandidates");
t1->SetBranchAddress("PndMicroCandidates",&fTr) ;

gives the error:

Error in <TTreeFormula::Compile>: Part of the Variable "PndMicroCandidates.GetCharge()" exists but some of it is not accessible or useable

the charge of all entries are zero.

I use the revision 6123. Maybe you have an idea what the responsible is?

Cheers,
leila

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Re: point of closest approach [message #9073 is a reply to message #9071]

Mon, 27 July 2009 11:03

Sebastian Neubert
Messages: 282
Registered: March 2006
Location: Munich

first-grade participant

From: *natpool.mwn.de

Hi!

I have not Worked with MicroCandidates yet, when I set up the LambdaSelector I just used the genfit tools.

The error message you get indicates a problem with the root dictionary. Maybe there is a problem in some LinkDef.h

Keep on trying!

Cheers! Sebastian.

Sebastian Neubert
Technische Universität München
Department Physik E18
sneubert@e18.physik.tu-muenchen.de
tel: +49-8928912592

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