Adrian,
what is the meaning of the error bars in each plot? Do they indicate the
resolution (or width of each Gaussian) for every bin?
Thanks,
Michael
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On Wed, 19 Oct 2005, Adrian T Sindile wrote:
> Hi, Michael!
> About momentum resolution in ep elastic - here is a plot I quickly found
> while looking for something to show:
>
> http://einstein.unh.edu/~adrian/meeting0905/7wcCutsPhi14Pol7.gif
>
> In the first two rows of this plot I have:
> 1) P_el - P_el(Theta_el) as a function of Theta_el;
> 2) P_pr - P_pr(Theta_pr) as a function of Theta_pr.
> The other rows are for similar and hopefully obvious comparisons.
>
> I believe the first is the relevant one (it shows the difference between
> electron momentum and the calculated electron momentum using electron theta,
> as a function of electron theta, for both left and right sectors - and both
> means and sigmas are shown for each theta bin - bins of 1 degree were used).
>
> I am not sure we can conclude the resolution is worse at higher electron
> angle... but please tell me what you think by looking at the plot.
>
> Adrian
>
>> On momentum resolution:
>> - In e,e'n VZ sees a worse resolution (width of the quasielastic peak in
>> the W-Spectrum towards higher Q2, exceeding the Fermi-broadening
>> - Not confirmed by the elastic peak in ed-elastic (CZ), however the
>> phase-space (or electron angle-momentum combination) in ed elastic is
>> different from e,e'N quasielastic.
>> - The worse resolution at higher Q2 should be apparent in ep elastic
>> (Chris, Adrian?), which covers a similar region of angle and momenta
>> compared to quasielastic. If people could comment ...
> k
>
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