Is anybody analyzing (e,e'd) elastic VECTOR polarized? This is John's
approved experiment. If this checks out then it probably means there is a
problem with the tensor spin bits. If it has a similar disease to the
tensor elastic it could mean that the problem is with the detector.
Richard
On Mon, 15 Mar 2004, Chi Zhang wrote:
>
> Hi Richard,
>
> My problem with electron into right sector is consistant with Genya's. But
> in constradict with Vitaliy's, which is better in LEFT electron. I don't
> know any details about Genya's analysis so I don't know to what extend he
> recovers the elastic cross section.
>
> I feel a little uneasy that analysis in ep elastic and other D2 channels.
> so I hope Genya had better cross section results.
>
> Just a follow up, please again see the attached dpe.ps. It draws (electron
> momentum reconstructed - electron momentum calculated from electron
> scattering angle). The sigma of the peaks are <=40MeV which is consistant
> with what we see with ep elastic. However, there is slight different in
> the position of the two peaks. on lower 30MeV than 0, one 20MeV higher.
> Tancredi pointed out to me that this is in fact a big left right
> inconsistancy, much bigger than the error in determination of the peak
> positions. again, red is electrons into the right.
>
> So it maybe is not a big suprise that we have inconsistant results in left
> and right sectors. Just it is our bad luck the poor results appear in the
> sector we expect to see the larger asymmetry.
>
> Chi
>
> On Mon, 15 Mar 2004, Richard Milner wrote:
>
> > Hi Chi,
> > Thanks for the message. Is your conclusion (electron right problematic)
> > consistent with Genya and Vitaly? I think your statement about the cross
> > section is very relevant. As we know, to form reliable asymmetries the
> > rates should be statistical. Is the spin sorting for left and right
> > detectors common or separate?
> > Richard
> >
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