tab.lis file different to plot, what are the correct units

From: <tristan.davenne_at_stfc.ac.uk>
Date: Tue, 27 Apr 2010 15:07:06 +0100

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Hi,

I have used a usryield scoring card to try and calculate pion+/- yield
from a target. I used usryield because I want to make a cut in
transverse momentum (only score pions that have a transverse momentum
below 0.5GeV/c) with energies in a defined range. I have specified
13bins in the energy range between 1.5GeV and 8GeV, i.e. 0.5GeV bin
width.

I looked at the tab.lis file that is created and I also plotted the
result using FLAIR and gnuplot. I found that the numbers in the plot
were higher than the values in the tab.lis file. I then found that the
numbers in the plot are a transformation of the numbers in the file.
Each number in the file has been multiplied by the energy in the centre
of the bin.

I have not multiplied by the surface area of the target or 2pi() at this
stage. Does that mean the numbers in the file have units of
pions/GeV/primary/cm2/sr and the numbers on the graph have units of
pions/primary/cm2/sr? I would appreciate confirmation on these units
from an expert as I was a little surprised to find the numbers in the
tab.lis file were different to the numbers on the plot.

I attach my input file if that is of any help.

Many Thanks

Tristan

Tristan Davenne
STFC Technology
G19 R65
Rutherford Appleton Laboratory
Chilton, Didcot, Oxfordshire OX11 0QX, UK
Tel: +44 (0)1235 445485
Email: tristan.davenne_at_stfc.ac.uk <mailto:t.r.davenne_at_rl.ac.uk>

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Received on Tue Apr 27 2010 - 21:42:05 CEST

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