Hi Vitaliy,
Interesting. I propose a meeting of all working on this problem early
next week (say Monday or Tuesday afternoon) at a mutually convenient
time. I would like to see all data (cross-sections, asymmetries etc.)
that are available. The plan is to take data for different target spin
angle directions over the weekend and we should have results from that by
the time of our meeting.
Richard
On Thu, 18 Mar 2004, vitaliy ziskin wrote:
> People, more food for thought
>
> I find it an increadible coincidence that tensor asymmetry on the
> quasielastic has the same pathology as elastic only the sectors are
> reversed. After hearing that Genya sees the asymmetry difference
> reverse itself with the target reversal I found out from him that for a
> normal target orientation quasielastic and elastic tensor asymmetries
> have opposite sign. That is, electron-left tensor asymmetry is positive
> in elastic and negative in quasielastic and vice versa. This now seems
> to make sence. It seems that this difference follows the sign of the
> asymmetry in each sector (verified by Genya today for reversed target).
> On the hunch I decided to look at tensor asymmetry in a quasielastic
> channel but in the region of extrimely low missing momentum where the
> tensor asymmetry is expected to be zero (or very small). And in fact it
> is very small < 1% in all Q^2 bins below 0.4 GeV^2/c^2. So, this to
> some degree eliminates a "false asymmetry between tensor plus and tensor
> minus due to MFT efficiency" theory.
> However, I still think that left-right differences in tensor asymmetry
> in elastic and quasielestic channels are NOT unrelated. It could still
> be the ABS problem, but now, less likely.
>
> Cheers, Vitaliy
>
>
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