[Hybrid baryons] moment analysis

[Daniel Carman]

Folks,

The full set of amplitudes for the induced and transferred polarization components for KY
electroproduction are included in Tamara Corthals Ph.D. thesis (a former student of Jan
Ryckebusch). The relevant link is at: http://inwpent5.ugent.be/Publication/phd <http://inwpent5.ugent.be/Publication/phd>. I am happy
to discuss details with Evgeny and Annalisa as needed.

Regards,
Daniel

> On Mar 13, 2016, at 9:24 PM, Viktor Mokeev <mokeev at jlab.org> wrote:
> 
> Hi All,
> 
> Based on the Volker proposal, I would suggest Evgeny will extend chi^2/d.p evaluation employing in the sum also the induced Lambda recoil polarization. I hope Dan has the expression for the amplitude combination for this observable under Ghent amplitude convention. After these expressions will be available, I guess it will be straightforward for Evgeny and also for Annalisa and Lucilla to implement them to the codes.
> 
>   Best Regards,
>                     Victor
> 
> ----- Original Message -----
> From: "burkert" <burkert at jlab.org>
> To: "hybrid baryons" <hybrid_baryons at jlab.org>
> Sent: Sunday, March 13, 2016 8:38:55 PM
> Subject: [Hybrid baryons] moment analysis
> 
> Dear all,
> 
>  At our previous meeting we discussed to extend the moment analysis to 
> the interference terms in the differential K-Lambda cross section. What 
> we have not included in our discussion in any detail is the fact that 
> the electron beam is highly spin polarized and that in the K+Lambda 
> channel we already measure the Lambda decay to proton-pi-, and thus we 
> automatically have the induced Lambda recoil polarization. With the 
> polarized electron beam we then can measure the polarization transfer 
> from the electron (virtual photon) to the Lambda.
> 
> In the real photon case the BnGa analysis showed that  the N(1900)3/2^+ 
> state was clearly identified by using the polarization transfer data 
> together with the other parts of the cross section. We will certainly do 
> the same in the future data analysis as well. However it would be nice 
> if we could demonstrate the sensitivity of these terms to resonance 
> excitation already for the proposal.
> 
>  I am sure Daniel has those components already written down and we 
> could study the Legendre expansion of those terms in the simulation as 
> well.
> 
> All the best,
> Volker
> 
> 
> 
> 
> 
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*                                                                                                                  *
* Dr. Daniel S. Carman                  e-mail : carman at jlab.org                     *  
* Staff Scientist                              office : (757)-269-5586                         *
* Jefferson Laboratory                   web: http://userweb.jlab.org/~carman  *  
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