[Olympus] PRC report

[Belostotski, Stanislav]

Hi, Michael,
This is of course possible. I think we all realized that the two sets of 
data are not luminosity normalized.
Yet I believe that two previous plots in log scale are important to 
include in PRC report as they demonstrate that  the measured yields 
follows coarsely to MC expectations in a large Q2 range.
Best regards Stan

On 05.02.2014 15:03, Michael Kohl wrote:
> Dear Stan, Yury,
>
> the logarithmic scale is hiding certain features.
> Can you produce a plot of the ratios (data/MC) for e+ and e- ? This
> should take out the leading Q2 dependence and help identify the problem
> zones.
>
> The enhanced e- yield at backward angle was already present in Jan's
> plot from October.
>
> Best regards
>    Michael
>
>
> On Wed, 5 Feb 2014, Belostotski, Stanislav wrote:
>
>> Dear Douglas and Jan,
>> Find please attached two plots (eps and pdf each)
>> showing comparison experimental yields with MC. The normalization is
>> done as follows:
>> Experimental distributions are normalized one to another under condition
>> that at Q2 around 1 GeV2 the ratio e+/e- must be equal to 1 ( as I
>> understand we used the same philosophy as  Jan did) ;
>> The e- MC points are normalized to experiment at Q2=0.65.
>> I avoid to combine both plots in one (too messy). To be honest, they are
>> anyway independent as we have not used normalization to luminosity.
>> To me the results look good enough. The enhancement around Q2=4 for
>> positrons has already been well explained by Jan. I am puzzled by excess
>> of experiment over MC at Q2 larger 1.5 for electrons (somewhat similar
>> but much less pronounced for positrons). Is that bgr contamination?
>> Might be, but it looks rather as a shift by whatever reason.
>> kind regards Stan,Yuri
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