Proof of factorization for electroproduction of multiple mesons and exclusive γ*γ production of multiple hadrons

Physical Review D - Particles, Fields, Gravitation and Cosmology

Volumn 61, Issue 7, 2000, Pages 1-6

  Freund, Andreas ^a  

^a INFN SEZIONE DI FIRENZE   (Italy)

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EID: 17044429732     PISSN: 05562821     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevD.61.074010     Document Type: Article

References (29)

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15. 1,2).
16. See Ref. [1] for details on the problem of transversely polarized photons in exclusive, electroproduction of vector mesons.
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18. 3 if the gluons connecting A to H and B to H were all scalar.
19. -.
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24. For example, the mass shell condition in deeply virtual Compton scattering or exclusive vector meson production and the fact that we chose the component of the produced mesons to be large determines the skewedness parameter to be equal to x in the above two cases. Note however, that for other final states the skewedness parameter is different from x.
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26. The real γ fluctuating into an initial hadronic state.
27. See arguments in Sec. II E for more details.
28. See Ref. [3] for a detailed discussion on the problems associated with this particular situation.
29. This is merely a matter of convenience, rather than necessity. One could have taken the incoming real photon to travel along the + direction and then only the labeling of the outgoing particles in Eq. (4) would change.