GBRAHMS

From: Erik Jakobsen (jakobsen@hehi03.nbi.dk)
Date: Fri Jun 01 2001 - 06:22:20 EDT

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    Hi BRAT's

I'm trying to make a GBRAHMS vertex distribution similar to a certain
run. I know the run has a gaussian vertex distribution with a
mean = -0.95 and a sigma of 77.16 for |z| <= 20 cm. Therefore I use the
command:  

u/c/spot 0. 0. 0. 0. -0.95 77.16  

The problem is that by using this command I get a gaussian vertex
distribution over a large interval of z, resulting in a heavy loss in
statistics, since I'm only using events with |z| <= 20 cm.

Does anyone know of a way to get a gaussian distribution for a limited
interval in z?  

Thanks, 
Erik

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