[b1_ana] To Do List

[O. A. Rondon]

Hi Karl,

Karl Slifer wrote:
> 
> 2) We need to add a discussion of the correlation length at our various x,
> and perhaps how this relates to HERMES.  Oscar, do you have time to
> summarize the work you did a few weeks ago into a paragraph or two?
>
I don't think it  would be useful. Basically, it says that there should
be no coherent effects to produce b1(x>~0.2)

> 3) We need to add a short discussion of the impact of aligning Pz along the
> beamline and not the q-vector.  Again, Oscar did the most work here, so as> a "reward" I'll ask him if he has time to please summarize in a paragraph
> or two.  This discussion can be combined with point 2) above.

I sent you an email about this. You may have missed it because of the
time  (2:00 AM Sat.) It's attached at the end.

> 5) Should we include b1_method-v2 discussion of difference of counts as an
> appendix?  Sorry if this was already resolved and I missed it.  Oscar, what
> do you think?
As I said many times, there is only one method, difference of counts. It
can be written in terms of Azz, with the dil. factor, or in terms of b1.
My suggestion would be to either mention this at the PAC  or have it on
a backup slide.

Oscar Rondon-Aramayo wrote:
> 
> 
> 
>   --- the forwarded message follows ---
> 
> ------------------------------------------------------------------------
> 
> Subject:
> Re: draft proposal
> From:
> "Oscar Rondon-Aramayo" <or at cms.mail.virginia.edu>
> Date:
> Sat, 04 May 2013 02:07:58 -0400
> To:
> "Karl Slifer" <karl.slifer at unh.edu>
> 
> 
> Hi Karl,
> 
> One more thing:
> 
> Our eq. (19?) for Azz is only good for B along q.
> 
> We need to show that it also works for longitudinal field, per Jaffe's
> section 6. He says (for deuterons only,)
> 
> sigma_parallel = Kx(F1d - Pzz*b1/3)
> 
> We need to convert it to sigma_parallel/sigma_unpol, where
> sigma_unpol = KxF1d (i.e. Pzz =0)
> 
> so we have s_p/s_u = 1 - (Pzz/3)*(b1/F1d) = 1 + Pzz*Azz/2
> 
> and for ammonia
> 
> s_p/s_u = 1 - f*Pzz*Azz/2
> 
> which is what we have. But somewhere we
> should have this connection between sigma_parallel and Azz.
> 
> Cheers,
> 
> Oscar
> 
>