[G12] Beam Correction II

[Hicks, Kenneth]

Looked at another way, the correction factor changed from 0.584% to 0.509%, a change of 584/509=1.15. Can you
do better to get a more accurate correction with less uncertainty?

From: g12-bounces at jlab.org [mailto:g12-bounces at jlab.org] On Behalf Of Johann Goetz
Sent: Monday, November 07, 2011 8:20 AM
To: Michael C. Kunkel
Cc: g12
Subject: Re: [G12] Beam Correction II

seems like the error in your result (the 1.00584) is maybe 0.001 or so. Is that reasonable?
On Sun, Nov 6, 2011 at 5:47 PM, Michael C. Kunkel <mkunkel at jlab.org<mailto:mkunkel at jlab.org>> wrote:
On 11/6/11 6:32 AM, Dennis Weygand wrote:
What exactly does 'manually' mean?

On Nov 4, 2011, at 8:53 PM, Michael C. Kunkel wrote:


Greetings G12'rs

I have realized if I do a manual fit to find the correction value, I can obtain different correction values for the beam.

My previous email had a correction factor of 1.00509. When I do it manually I get a correction factor of 1.00584.

I have attached the new plot for run 56515. There is now only a 2.78 MeV difference in the mass peak from the expect.

I know believe this is the correct path to undertake for the beam corrections.

BR
MK

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It means, instead of having ROOT do a TF1 fit with initial parameters and allowed variances, I open the histogram, right click the histogram, open fit panel, manually set my limits ..etc.....ie manually


BR
MK

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