Abstract
We present a formalism and explicit results for two-loop flavor singlet evolution kernels of skewed parton distributions in the minimal subtraction scheme. This approach avoids explicit multiloop calculations in QCD and is based on the known pattern of conformal symmetry breaking in this scheme as well as constraints arising from the graded algebra of the script N = 1 super Yang - Mills theory. The conformal symmetry breaking part of the kernels is deduced from commutator relations between scale and special conformal anomalies while the symmetric piece is recovered from the next-to-leading order splitting functions and script N = 1 supersymmetry relations.
Original language | English (US) |
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Pages (from-to) | 347-406 |
Number of pages | 60 |
Journal | Nuclear Physics B |
Volume | 574 |
Issue number | 1-2 |
DOIs | |
State | Published - May 15 2000 |
Externally published | Yes |
Keywords
- Conformal constraints
- Evolution equation
- Supersymmetric constraints
- Two-loop exclusive kernels
ASJC Scopus subject areas
- Nuclear and High Energy Physics