Revisiting the factorization theorem for ργ*→π(ρ) at twist 3
نویسندگان
چکیده
منابع مشابه
Two-parton twist-3 factorization in perturbative QCD
Abstract We prove collinear factorization theorem for the process πγ∗ → π at the twist-3 level in the covariant gauge by means of the Ward identity, concentrating on the two-parton case. It is shown that soft divergences cancel and collinear divergences are grouped into the pseudo-scalar and pseudotensor two-parton twist-3 pion distribution amplitudes. The delicate summation of a complete set o...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.95.076005