Re: [Brahms-dev-l] setting up GEANT

From: Hironori Ito <hito@rcf.rhic.bnl.gov>
Date: Mon Mar 14 2005 - 16:49:56 EST
Hello.  You should be careful to use the rotation function for detector 
covering 2PI(or large fraction).  By rotatiting particles, you just 
rotate them to hit different segements of the same detectors (or next 
detector).  The rotated events might have very strong correlation with 
the original un-rotated event.  If that is the case, the rotated events 
are not usefull since they are not independent.

Hiro


Johnson, Erik B wrote:

>Brahms,
>    I heard some where that it is possible to change the angle in phi of Hijing data when setting up a new GEANT simulation.  The pupose of doing this, I heard, was to increase the statistics for simulations of the FS and MRS.   Since I induced flow into the hijing data, I can do the same for the mult array. I have a perl script I use to create another script to run a GEANT simulation.  In the perl script there is a variable called rotang, which is set to 0.0 at the moment.  Is this the variable I should change to rotate the data by some angle? And is this angle in radians or degrees?
>Please Help,
>Erik
>
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Received on Mon Mar 14 16:50:57 2005

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