RE: [Brahms-dev-l] Acceptance Weighting for dAu and pp atForwardRapidities

From: J.H. Lee <jhlee@sgs1.hirg.bnl.gov>
Date: Mon Jan 26 2004 - 09:55:21 EST
Hi, Michael,

> 
>   Dear JH,
>         this seems like a good idea.  

  I think so too. ;)

> why aren't the 
> different a regions symetric about the peak? It seemed to me 
> that you were only using 7 regions but that your index ran over 8. 

  The distribution is (assumed to be) symmetric around the 
  vertex position. 
  The 8th region (A8) is simply not shown on the plot.  

  JH

> 
> -----Original Message-----
> From:	J.H. Lee [mailto:jhlee@sgs1.hirg.bnl.gov]
> Sent:	Sat 1/24/2004 9:49 AM
> To:	'BRAHMS Software list'
> Cc:	
> Subject:	[Brahms-dev-l] Acceptance Weighting for dAu and 
> pp at ForwardRapidities
> 
> Hi,
>  
> As we all know, picking up a right acceptance map 
> for a given z at small angle is tricky due to a limited 
> accuracy on determining the origin of the track.  
> it's especially an issue for dAu and pp data since 
> BB vertices are available only for a fraction of event.  
>  
> Here is what I believe one of  the ways to accommodate 
> the uncertainties in applying z dependent acceptance weight. 
> This method doesn't require generating new maps and 
> has been "successfully"  adapted in the Ramiro's analysis.  
>  
http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/acceptance/new_acceptance_
weighting_for_forward_in_dAu.pdf
 
Cheers, JH   




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Received on Mon Jan 26 09:55:50 2004

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