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[SOLVED] pp->K0s+X with V5.34 [message #13544] Tue, 29 May 2012 15:45 Go to next message
Jia-Chii Chen is currently offline  Jia-Chii Chen
Messages: 20
Registered: April 2011
occasional visitor
From: *
Dear Ingo,

I'm simulating a K0s cocktail for the correction of and comparison to the inclusive K0s in p+p at 3.5GeV. Until now I have been using 2 years old simulation based on V4.11, which look proper for all observables that have been studied.

For several reasons I wanted now to re-simulate my K0s cocktail but with the newer version 5.34 (this is the one, which is installed here in Munich). However, the first glimpse at the rapidity distribution dN/dy shows a shift of the gaussian towards beam rapidity. In version 4.11 it's symmetric with respect to mid-rapidty, as it should be. (Pictures can be downloaded.) Do you have an explanation for this?

For both versions similar macros have been used. The difference is just the way, how strange particles were included. For V4.11 I was using the missing_particle.dat file to include e.g. Sigma*. In V5.34 I'm using the command "makeDistributionManager()->Exec("strangeness:init")".

Thanks a lot for your help already!

With best regards,


[Updated on: Wed, 22 May 2013 12:44] by Moderator

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Re: pp->K0s+X with V5.34 [message #13545 is a reply to message #13544] Tue, 29 May 2012 16:52 Go to previous messageGo to next message
Ingo Froehlich is currently offline  Ingo Froehlich
Messages: 167
Registered: March 2004
Location: IKF - Frankfurt
first-grade participant
From: *
Dear Chii,

I downloaded your macro and have some questions and comments. There are several channels included, which seem to be selected via a case switch in your macro. Is the problem which you describe present in all channels? Furthermore, does the plot show all particles species, or only the reconstructed K0S?

I have found one typo already, "Sigma1385" must be "Sigma13850".

Lambda1520 and K0*896 are not yet part of the strangeness plugin. You can add similar lines like:
makeStaticData()->AddParticle(71,"Sigma1385+", 1.3828);	
makeStaticData()->AddDecay("Sigma(1385)+ --> Lambda + pi+", "Sigma1385+", "Lambda,pi+", .8815 );    
makeStaticData()->AddDecay("Sigma(1385)+ --> Sigma+ + pi0", "Sigma1385+", "Sigma+, pi0", .05925);
makeStaticData()->AddDecay("Sigma(1385)+ --> Sigma0 + pi+", "Sigma1385+", "Sigma0, pi+", .05925);

into your macro after the call of the strangeness plugin.

Later we can add it into the Pluto code. This would be nice, to be compatible

Ingo Froehlich
IKF - University of Frankfurt
069-798-47027, FAX: -47024
Re: pp->K0s+X with V5.34 [message #13550 is a reply to message #13545] Wed, 30 May 2012 16:36 Go to previous message
Jia-Chii Chen is currently offline  Jia-Chii Chen
Messages: 20
Registered: April 2011
occasional visitor
From: *
Hi Ingo,

I'm sorry, there is nothing wrong with V5.34.
I found the mistake in the binning in my post-Pluto-analysis.

By the way, right now I don't need K*896, Sigma1385 or Lambda1520 for the K0s cocktail. But it's still good to know, that they are not automatically included and how to include them.

Thank you, however, for the fast response and sorry again.

Best regards,

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