Richard,
Which side gives 20%? This maybe a strange coincidence but the tensor
asymmetry for d(e,e'p)n also shows 20+/-12 % target polarization in
electron-left sector and 65 +/- 10% in electron-right sector. To me
this seems too strange of a coincidence, espacialy considering that
vector (e,e'p)n results are consistent in both sectors. I, however, do
not see how a target field can effect only tensor asymmetry and not
vector. One thing to keep in mind is that BLAST is not symmetric for
de(e,e'n)p.
Cheers,
Vitaliy
Richard Milner wrote:
>Yesterday at the daily meeting Genya showed results for vector and tensor
>target polarization since mid-February. The vector polarization is
>derived from (e.e'p) by Vitaliy and is consistent with about 70%. On one
>side the tensor polarization derived from (e,e'd) elastic is consistent
>with the vector and has a value also of about 70%. However, on the other
>detector side the tensor polarization is only about 20%, i.e. the observed
>asymmetry (though consistent over time) is about a factor of three to four
>lower than the expectation. As Genya said there are three possibilities:
>
>- there is a problem with the analysis
>I believe there are other analyses in progress. What do you see?
>
>- there is a problem with the measurement
>
>- there is a problem with the prediction for one side
>
>Any thoughts on this would be welcome. It struck me that if we revesre
>the transverse component of the target holding field, then left <-> right
>and we should see asymmetries change side. Any comments?
>
>Richard
>
>
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