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Re: Pion energy deposition (fwd)
---------- Forwarded message ----------
Date: Tue, 02 Apr 2002 16:14:14 -0500
From: James Hubbard <jhubbard@mcs.uvawise.edu>
To: David Doughty <doughty@pcs.cnu.edu>,
Dr. Richard Jones <jonesrt@uconnvm.uconn.edu>,
Dr. Scott Teige <teige@dustbunny.physics.indiana.edu>
Cc: Dr. EltonSmith <elton@jlab.org>
Subject: Re: Pion energy deposition (fwd)
Hello everyone,
Dr. Teige thanks for the information. I'm attaching a plot from our data for
just a pi+. I've moved all of the non interacting pi+'s off of the graph.
This is what I'm getting for the X(1600) -> n pi+ pi- pi+. The data is for a
single track. The graphs for the other pi- and pi+ are basically the same.
Total Events 9851
Non Inter: 2170 22%
.1 - .2 2154 22%
.2 - .3 1008 10%
> .8 75 0.7%
There seems to be quite a bit of difference between what we're getting and what
Dr. Teige is getting.
James Hubbard
David Doughty wrote:
>
> ---------- Forwarded message ----------
> Date: Mon, 25 Mar 2002 11:48:05 -0500
> From: Scott Teige <teige@dustbunny.physics.indiana.edu>
> To: doughty@jlab.org, richard.t.jones@uconn, edu@indiana.edu
> Subject: Pion energy deposition
>
> Hi All,
>
> I've measured the pions energy deposition fraction from
> E852 data. I do the following:
>
> 1) I select data where the trigger had no LGD requirement
> 2) I find charged tracks in the spectrometer
> 3) I swim those tracks to the plane of the LGD and demand
> the projected point be in the useful area of the LGD
> 4) I find the nearest cluster to the projected impact point
> 5) If that cluster is within 20 cm of the impact point I assume
> it is associated with the pion.
> 6) If no cluster is found, an LGD energy of zero is used otherwise,
> the observed energy in the LGD is used.
> 7) I plot up E_lgd/E_pion
>
> I find:
>
> 43% Do not interact
> 55% Deposit less than 10% of their energy
> 71% Deposit less than 20% of their energy
> 82% " 30% "
> 2% deposit more than 80%
>
> The distribution is attached. Hope this helps.
>
> S.
>
> Scott Teige
> Mail teige@dustbunny.physics.indiana.edu
> WWW http://anthrax.physics.indiana.edu/~teige
>
> I can often be found near
> N39 10.400, W86 35.490, +952 ft Mean Sea level
>
> ________________Deep and Pithy Saying:__________________
> avoid partisan witch hunts, endless investigations or fishing
> expeditions
>
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>
>
> ------------------------------------------------------------------------
>