Details

Autor(en) / Beteiligte

• Shen, Yue-Long
• Gao, Jing
• Lü, Cai-Dian
• Miao, Yan

Titel

Power corrections to the pion transition form factor from higher-twist distribution amplitudes of a photon

Ist Teil von

• Physical review. D, 2019-05, Vol.99 (9), p.096013, Article 096013

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this paper, we investigate the power-suppressed contributions from two-particle and three-particle twist-4 light-cone distribution amplitudes (LCDAs) of a photon within the framework of light-cone sum rules. Compared with the leading twist LCDA result, the contribution from three-particle twist-4 LCDAs is not suppressed in the expansion by 1/Q2, so that the power corrections considered in this work can give rise to a sizable contribution, especially at the low−Q2 region. According to our result, the power-suppressed contributions should be included in the determination of the Gegenbauer moments of pion LCDAs with the pion transition form factor.