STI Publications - View Publication Form #12148
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Publication Information
| Title | Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling | ||||
| Abstract | We present a relativistic formulation of pion loop corrections to the coupling of photons with nucleons on the light-front. Vertex and wave function renormalization constants are computed to lowest order in the pion field, including their nonanalytic behavior in the chiral limit, and studied numerically as a function of the ultraviolet cutoff. Particular care is taken to explicitly verify gauge invariance and Ward-Takahashi identity constraints to all orders in the m_\pi expansion. The results are used to compute the chiral corrections to matrix elements of local operators, related to moments of deep-inelastic structure functions. Finally, comparisons of results for pseudovector and pseudoscalar coupling allows the resolution of a long-standing puzzle in the computation of pion cloud corrections to structure function moments. | ||||
| Author(s) | Chueng Ji, Wally Melnitchouk, Anthony Thomas | ||||
| Publication Date | October 2013 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | 88 |
| Issue | 07 |
| Page(s) | 076005 (18 pages) |
Attachments/Datasets/DOI Link
| Document(s) |
Z1.pdf
(STI Document)
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| DOI Link | |
| Dataset(s) | (none) |
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