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Forum: Physics List
Date: 31 Aug, 2017
From: Stephan Zimmer <Stephan Zimmer>

Dear colleagues,

We are currently using Geant4.10.02 as MC package for our DAMPE detector, 
a multi-purpose astrophysics experiment capable of detecting gamma-rays and 
electrons from ~ GeV - 10 TeV and protons/ions with primary energies of 
up to 100 TeV ( So far we have been 
using the physics list: QGSP_FTFP_BERT 
as our default for hadronic physics. Following the reference page:
I can find the various options, e.g. QGSP_BERT and FTFP_BERT, but unless 
i'm mistaken, the two are mutually exclusive, since one uses the 
quark-gluon string model (QGSP) whereas the other uses the Fritiof string 
model (FTFP).

This leaves me puzzled, since V. Ivantchenko commented in a 
private email exchange that "FTFP_BERT is Geant4 default but we 
think QGSP_FTFP_BERT can be considered for astrophysical applications", so 
apparently we are using 'the best available' physics list. But what I 
can't find anywhere is what exactly QGSP_FTFP_BERT is and how it e.g. 
should be prefered over FTFP_BERT or QGSP_BERT, especially in the context 
of physics up to E~100 TeV.

Could you please help clear up my confusion?
Thank you very much for your help!

Stephan Zimmer
DPNC, University of Geneva, Switzerland

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1 None: Re: physics list for HE astrophysics applications   (Alberto Ribon - 07 Sep, 2017)
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