Thursday, December 14, 2023, 12:30 pm — Bldg. 510, Room 2-160
Abstract: I consider the "breakpoint" (x -> xi) region in DVCS, DVMP and exclusive photoproduction of a pi0gamma pair with large invariant mass in the framework of the CSS formalism. The corresponding subtleties in the factorization proofs of DVCS and DVMP are discussed. The exclusive photoproduction of a pi0gamma pair with large invariant mass (and similar 2 -> 3 processes) have recently been proposed to access the x-dependence of GPDs beyond the moment-type information. I show that collinear factorization is broken by a Glauber contribution in the gluon channel. I further conclude that collinear factorization should hold for certain mesons (e.g. charged pions) that forbid the gluon channel.
Hosted by: Manu Kurian, Raza Sufian
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