Twist-3 contribution tohLin the instanton vacuum
نویسندگان
چکیده
منابع مشابه
Nucleon matrix elements of twist – 3 and 4 operators from the instanton vacuum †
The spin–dependent twist–3 and 4 nucleon matrix elements d (2) and f (2) describing power corrections to the Bjorken and Ellis–Jaffe sum rules are computed in the instanton vacuum. A systematic expansion in the small packing fraction of the instanton medium, ¯ ρ/ ¯ R ≪ 1, is performed. We find that the twist–3 matrix element d (2) is suppressed [of order (¯ ρ/ ¯ R) 4 ], while the twist–4 matrix...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.61.097501