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Title: Forward Compton scattering with weak neutral current: Constraints from sum rules

Journal Article · · Physics Letters B

We generalize forward real Compton amplitude to the case of the interference of the electromagnetic and weak neutral current, formulate a low-energy theorem, relate the new amplitudes to the interference structure functions and obtain a new set of sum rules. Furthermore, we address a possible new sum rule that relates the product of the axial charge and magnetic moment of the nucleon to the 0th moment of the structure function g5(ν, 0). For the dispersive γ Z-box correction to the proton’s weak charge, the application of the GDH sum rule allows us to reduce the uncertainty due to resonance contributions by a factor of two. Finally, the finite energy sum rule helps addressing the uncertainty in that calculation due to possible duality violations.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
FG02-93ER-40756; SFB 1044; AC02-07CH11359
OSTI ID:
1244110
Alternate ID(s):
OSTI ID: 1221235
Report Number(s):
FERMILAB-PUB-15-051; S0370269315004311; PII: S0370269315004311
Journal Information:
Physics Letters B, Journal Name: Physics Letters B Vol. 747 Journal Issue: C; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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