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Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18075]

Thu, 26 March 2015 16:40

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Dear All,

I have simulated 10^4 events for the signal channel pbar p-> D*+ D*- -> D0 pi+ D0bar pi- while adding Lambda Disks to the rest detector system in the sim_complete.C macro. I have observed that with the ideal tracking code (i.e. recoideal_complete.C) D0 (k- pi+) and D*+ (D0 pi+) are not reconstructed but with the global tracking code (reco_complete.C) are reconstructed well. I have attached the invariant mass plots here with both the tracking codes.

Without adding Lambda Disks both tracking code performed as expected. I did not understand what is issue with the ideal tracking code.

Why D0's are not well reconstructed with ideal tracking code while adding Lambda Disks to rest detector system?

Can anybody teach me in this regard ??

Thanks in advance

Ajay

Attachment: DstarPlus_DstarMinus_InvMass_GlobalTraking.png
(Size: 20.58KB, Downloaded 484 times)
Attachment: DstarPlus_DstarMinus_InvMass_IdealTraking.png
(Size: 22.58KB, Downloaded 456 times)

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18076 is a reply to message #18075]

Thu, 26 March 2015 16:59

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

Which version of the code are you using?

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18077 is a reply to message #18076]

Thu, 26 March 2015 17:17

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Dear Stefano,

I am using apr13 release of external package and oct14 release of pandaroot.
I took both the code from /macro/run/ folder.

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18078 is a reply to message #18077]

Thu, 26 March 2015 17:27

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

Can you upload your complete analysis chain? (sim, digi, recox2, pid, dec, analysis)

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18079 is a reply to message #18078]

Thu, 26 March 2015 17:54

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Dear Stefano,

Please find the attached complete analysis folder here.

Regards
Ajay

Attachment: testD0.tar.gz
(Size: 9.30KB, Downloaded 264 times)

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18088 is a reply to message #18079]

Sat, 28 March 2015 11:25

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *ip112.fastwebnet.it

Can you please check without the lambda disk?

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18089 is a reply to message #18088]

Sun, 29 March 2015 15:34

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Hello Stefano,

I have checked without Lambda Disks again and was able to track D0 particle with Ideal tracking. while adding Lambda Disks Ideal track finding algorithm was not able to track D0 particle.
Please find attached same plots without Lambda Disks and give me your valuable suggestions.

Thanks & Regards
Ajay

Attachment: DstarPlus_DstarMinus_InvMass_IdealTraking_Without_LamDisks.png
(Size: 20.25KB, Downloaded 305 times)
Attachment: DstarPlus_DstarMinus_InvMass_GlobalTraking_Without_LamDisks.png
(Size: 19.44KB, Downloaded 302 times)

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18090 is a reply to message #18089]

Sun, 29 March 2015 16:58

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *ip112.fastwebnet.it

I suppose there is some bug in the part correlated to the lambda disk, which was never official tested for reconstruction.
I suggest to check with single particles reaching the lambda disk, and compare results with and without the disk. I presume the disk affects only forward tracks, isn't it? Your D events are too much complicated to understand what could go wrong.

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18096 is a reply to message #18090]

Tue, 31 March 2015 11:30

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Hello Stefano,

I have simulated single pi+ per event using box generator with and without Lambda disks. I observed that some pi+ were lost with Lambda Disks in comparison of without Lambda Disks. I have used both tracking code to see the effect of Lambda disks on the pi+ tracks. I have attached related plots here.
Kindly give your suggestions.

Thanks and Regards
Ajay

Attachment: GlobalTraking_Without Lambda Disks.png
(Size: 13.72KB, Downloaded 288 times)
Attachment: GlobalTraking_With Lambda Disks.png
(Size: 12.88KB, Downloaded 313 times)
Attachment: IdealTraking_Without Lambda Disks.png
(Size: 13.28KB, Downloaded 302 times)
Attachment: IdealTraking_With Lambda Disks.png
(Size: 10.73KB, Downloaded 301 times)

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18097 is a reply to message #18096]

Tue, 31 March 2015 11:39

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

Are you sure that the lambda disk is properly implemented in reconstruction?

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18098 is a reply to message #18097]

Tue, 31 March 2015 12:00

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: 14.139.35*

Hello,

I just implemented Lambda Disks in the "sim_complete.C" macro. As these are using MVD classes, so I assume that included them in reconstruction too.
Is that the answer of your question?

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18099 is a reply to message #18098]

Tue, 31 March 2015 12:33

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

This means that most probably it is not implemented in reconstruction, or that it could screw the reco chain. I would check the output of all the objects up to PndTrack to be sure that it really works.

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18266 is a reply to message #18075]

Fri, 22 May 2015 11:31

Ajay Kumar
Messages: 102
Registered: December 2011
Location: indore

continuous participant

From: *ext.kfa-juelich.de

Dear Stefano,

I am still waiting for your reply. Is there any update on this issue? Rolling Eyes

Thanking you

Ajay

AJAY KUMAR
Research scholar
Indian Institute of Technology Indore,Indore
Madhya Pradesh
India

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Re: Problem with Invariant mass distribution of D0 and D* candidates while using different tracking code [message #18267 is a reply to message #18266]

Fri, 22 May 2015 11:53

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

Hi,
sorry, I was not clear.

Quote:

I would check the output of all the objects up to PndTrack to be sure that it really works.

-> If I were in you I would check the output of all the objects up to PndTrack to be sure that it really works.

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