Chi Zhang wrote:
>> Cross-sections is another matter. I do see that one of the sectors
>>
>>
>I believe asymmetry is the difference between two cross sections.
>
Actually, it is not. We calculate asymmetry separately for the Left
and Right sector, and difference
in the "cross sections" for Left and Right doesn't come into tha game.
>
>
>
>>has low-momentum events cut off
>>somewhat, but that could be attributed to different reasons. To begin
>>with, does reconstruction take
>>into account particles bending in the holding field?
>>
>>
>typical track lengths are 3m. width of the target box is 10cm. holding
>field ~ 300G, blast field ~3000G. so the effect of field integrated over
>the path(or time spent on the path) makes the holding field effect <1%.
>
With electron angle of only 25 degrees, the electron path is much
longer and the total angle
accumulated in the magnet is about 1 degree. Not much, but not
negligable either.
Genya
>
>
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