[Frost] Phi dependence of lambda pulls

[Franz Klein]

Thanks, Priya!
That is exactly what I was looking for!
The distributions after Eloss corrections should be the starting point 
(as long as we can trust that materials and geometries in the Eloss 
routines are correct).
The pulls (slide 4) show clear phi dependence within sectors and an 
overall variation, which looks consistent with the target field 
orientation (but less pronounced for pi-).
A suggestion to look more closely into the effects: can you do the same 
distributions for different momentum ranges? (e.g. p<450MeV, 
450<p<700MeV, and p>700MeV)

And finally: can you point me to the code you used as momentum and 
photon E corrections? There might be a simple way to correct for the 'S' 
curved phi dependence.

Cheers,
Franz

On 06/21/2013 12:14 AM, Roy, Priyashree wrote:
> Dear all,
>
> As we discussed in the last two FROST weekly meetings about finding whether we see any phi dependence of lambda pulls, I have finally completed making the plots after coming back from HUGS summer school. Please find the plots which show the phi dependence of lambda pulls for proton, pi+ and pi- here -
>
> http://www.jlab.org/Hall-B/secure/g9/priyaroy/Phi_versus_lambda_pull.pdf
>
> The pulls are certainly depending on Phi.
>
> Regards,
> Priyashree
>
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                   Franz J. Klein, Associate Professor
                   CUA, Department of Physics
                   Washington, DC 20064
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