Re: [Brahms-dev-l] Acceptance maps

   Hi Flemming, Hans,

   I cannot say exactly what is the problem with the new version. I also
encountered the bug in the error calculation function which returns
nan. Hongyan actually pointed me to that. I am using an older version
of banapp which i modified. The weird thing is that i did not modify
anything in the acceptance code for some time and i remember that i
could generate maps without problems. Now i can't anymore. Is it
posible that the problem is generated by something external? like the
database?

            Ionut

P.S. If you need acceptance maps for 62 GeV, you can look into
~aic/acceptance. There are both (pt, y) and (mt, y) maps there.


> Hi
>
> This is indeed surpeising; but it could depend on whatever fiducial cuts
> have been applied. Did you overwrite the old maps ?
> The old code certainly had a problem in so far it did not include the dead
> slats in tofw which is crucial for PID, but this effect
> would in fact not lower the yeilds, so my gueass it has to do with
> fiducial cuts.
> On the FS part I have not tried the new banapp. It sounds we really should
> compare new/old. I still have the old version around
> and have generated maps, so this may be feasible.
> I cc the answer to the list because others may have clues to this, and or
> comments.
>
> Flemming
>
> --------------------------------------------
> Flemming Videbaek
> Physics Department
> Bldg 510-D
> Brookhaven National Laboratory
> Upton, NY11973
>
> phone: 631-344-4106
> cell:       631-681-1596
> fax:        631-344-1334
> e-mail: videbaek @ bnl gov
>   ----- Original Message -----
>   From: Hans Hjersing Dalsgaard
>   To: Flemming Videbaek
>   Sent: Wednesday, January 10, 2007 7:18 PM
>   Subject: Acceptance maps
>
>
>   Hi Flemming,
>
>   After generating new MRS maps, my yields in the MRS dropped some 20 % !
> The maps I used before were generated half a year ago or something like
> that....I must admit I was a little surprised. I do not understand how
> the MRS maps apparently changed so much in this brief time ?
>
>   Furthermore, using the latest version of banapp, I am unable to generate
> FS maps due to some bug in the error minimization. The calculation gets
> stuck at "nan %" ...so far I have been unable to track the bug.
>
>   Do we have some up-to-date maps for the 62 GeV data somewhere on rcas?
> Using these would rule out any error I might commit in generating the
> maps....
>
>   Regards,
>
>   Hans
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>


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