[Hybrid baryons] Trasnsformation factor fror the amplitude from Ghent to JM convention

[Viktor Mokeev]

  Dear Colleagues,

 I send you derivation of the transformation factor which transforms the KY electroproduction amplitudes from the convention of the Ghent model to the convention of the JM model. Please see Eq.(7) in the write-up.

 Our full amplitude with hybrid should be the sum of the Ghent amplitude transformed to the JM conventions according to Eq. (7) and the hybrid resonant contribution evaluated with the framework of the BW ansatz of the JM model described in Section IX of the LOI. Differential KY cross sections with/without hybrid baryon should be obtained from  the aforementioned full amplitudes employing the  JM convention, as it is described in Appendix A of the LOI, Eqs (23-25).

Check: Differential cross sections without hybrid computed in the Ghent convention should be exactly the same as computed in the JM model convention from the transformed to the JM convention Ghent amplitudes according to Eq.(7) of the attached write-up. The check should be done before the event simulation!

 I expect, the next Friday E.Golovach will report the progress in the development of the code for KY differential cross section evaluation with/without hybrid in the lines we have discussed in Moscow past week.


   Best Regards,
                    Victor  
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