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Twist-3 contributions to wide-angle photoproduction of pions

Kroll, Peter; Passek-Kumerički, Kornelija (2018) Twist-3 contributions to wide-angle photoproduction of pions. Physical review. D., 97 . ISSN 2470-0010

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We investigate wide-angle π0 photoproduction within the handbag approach to twist-3 accuracy. In contrast to earlier work both the 2-particle as well as the 3-particle twist-3 contributions are taken into account. It is shown that both are needed for consistent results that respect gauge invariance and crossing properties. The numerical studies reveal the dominance of the twist-3 contribution. With it fair agreement with the recent CLAS measurement of the π0 cross section is obtained. We briefly comment also on wide-angle photoproduction of other pseudoscalar mesons.

Item Type: Article
Uncontrolled Keywords: meson photoproduction; wide-angle; twist-3
Subjects: NATURAL SCIENCES > Physics
Divisions: Theoretical Physics Division
Project titleProject leaderProject codeProject type
Ruđer Bošković Institute: Twinning for a step forward of the Theoretical Physics Division-RBI-T-WINNINGFabrizio NESTI692194EK
Fizika Standardnog modela i njena proširenja-PhySMaBBlazenka MelicIP-2013-11-5169HRZZ
Depositing User: Kornelija Passek-Kumerički
Date Deposited: 13 Jun 2018 15:25
DOI: 10.1103/PhysRevD.97.074023

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