Q{sup 2}-variation of Bjorken and Ellis-Jaffe sum rules
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:387161
We identify all contributions to the 1/Q{sup 2} term in the Bjorken and Ellis-Jaffe sum rules, which include the matrix elements of a spin-2 twist-2 operator, a spin-2 twist-3 operator, and spin-1 twist-4 operator. The matrix elements of the higher twist operators (twist- three and four) contain explicit gluon fields, and can be evaluated in the MIT bag model with novel use of the QCD equations of motion. Together with the information of the sum rules at low energy, we give a Q{sup 2} variation of the Bjorken and Ellis-Jaffe sum rules, which should be tested at CEBAF.
- OSTI ID:
- 387161
- Report Number(s):
- CONF-931044--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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