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It is not good to evaluate dA/A because if A=0 then error always infinite. dA should be evaluated.
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<div class="">On Feb 5, 2021, at 9:51 AM, Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>> wrote:</div>
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Dear Colleagues,</div>
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Please find below the analytical evaluations for BSA uncertainties: a) the absolute uncertainty values \DeltaA (next to bottom string); b) relative \DeltaA/A values (bottom string)</div>
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As you may see, the relative DeltaA/A uncertainty is described by the product of two terms. The second (from left to right) term is proportional 1/sqrt(N+-N-), as FX mentioned. However, the first term 1/(N+-N-) inflates DeltaA/A values for A<0.1, which a typical
values for the BSA in the N* region. For this reason, statistics matters, in particular in the resonance region where the statistics is much smaller in comparison with the DIS region.</div>
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Best Regards,</div>
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Victor<br class="">
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<div id="divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class=""> From:</b><span class="Apple-converted-space"> </span>Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Friday, February 5, 2021 9:38 AM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>><br class="">
<b class="">Subject:</b></font>
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<div dir="ltr" class="">Sent from my iPhone</div>
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