Dear Claus,
I think that the problem is almost certainly that
we are not using up to date slewing corrections. There should
be enough data to do this now so I will work on it.
Yours Michael
Quoting "Claus O. E. Jorgensen" <ekman@nbi.dk>:
>
> Hi Trine,
>
> > We've looked very briefly and qualitatively at vertex correlations
> > here in Oslo too, and we see nice correlations between BB and ZDC and
>
> > between BB / ZDC and track intersections with the beam plane (much
> like
> > Claus' plots) - there's only the question of an offset.
>
> I don't agree with this. Last year the |bbVtxZ - zdcVtxZ|
> gave a peak with a sigma of 3.8 cm (Bjorns thesis, page 73),
> so I don't think we should call it a "nice correlation" when
> we get a sigma of 15 cm - it's not only a question of an
> offset, it's unfortunately also a question of new time
> calibrations.
>
> Cheers,
>
> Claus
>
> +-------------------------------------------------------------+
> | Claus Jørgensen |
> | Cand. Scient. Phone : (+45) 33 32 49 49 |
> | Cell : (+45) 27 28 49 49 |
> | Niels Bohr Institute, Ta-2, Office : (+45) 35 32 53 07 |
> | Blegdamsvej 17, DK-2100, E-mail : ekman@nbi.dk |
> | University of Copenhagen Home : www.nbi.dk/~ekman/ |
> +-------------------------------------------------------------+
>
>
Michael Murray, Cyclotron TAMU, 979 845 1411 x 273, Fax 1899
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