Azimuthal asymmetries in semi-inclusive deep inelastic scattering with polarized beam and/or target and their nuclear dependences

作者：Song, Yu-kun^*; Gao, Jian-hua; Liang, Zuo-tang; Wang, Xin-nian

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, 89(1): 014005.

DOI：10.1103/PhysRevD.89.014005

• POWER CORRECTIONS
• HADRONIC SCATTERING
• SPIN ASYMMETRY
• PARTON MODEL
• DISTRIBUTIONS
• LEPTOPRODUCTION
• GAUGE
• PIONS
• KAONS

Using the formalism obtained from collinear expansion, we calculate the differential cross section and azimuthal asymmetries in the semi-inclusive deeply inelastic lepton-nucleon (nucleus) scattering process e(-) + N(A) -> e(-) + q + X with both polarized beam and polarized target up to twist-3. We derive the azimuthal asymmetries in terms of twist-3 parton correlation functions. We simplify the results by using the QCD equation of motion that leads to a set of relationships between different twist-3 functions. We further study the nuclear dependence of azimuthal asymmetries and show that they have similar suppression factors as those in the unpolarized reactions.

• 出版日期2014-1-6
• 单位山东大学; 华中师范大学; 中国科学技术大学