Naslov
Twist-3 contributions to wide-angle photoproduction of pions

Autori
Kroll, Peter ; Passek-Kumerički, Kornelija

Izvornik
Physical review. D. (2470-0010) 97 (2018); 074023, 16

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
meson photoproduction, wide-angle, twist-3

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
ArXiv:1802.06597

POVEZANOST RADA