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Title: Nucleon spin-averaged forward virtual Compton tensor at large Q2

The nucleon spin-averaged forward virtual Compton tensor determines important physical quantities such as electromagnetically-induced mass differences of nucleons, and two-photon exchange contributions in hydrogen spectroscopy. It depends on two kinematic variables: $$\nu$$, the virtual photon energy in the proton rest frame, and $Q^2$, the photon's invariant four-momentum squared. Using the operator product expansion, we calculate the tensor's large-$Q^2$ behavior for $$\nu=0$$, including for the first time the full spin-2 contribution and correcting a previous result for the spin-0 contribution. Implications for the proton radius puzzle are discussed.
Authors:
;
Publication Date:
OSTI Identifier:
1345627
Report Number(s):
FERMILAB-PUB-16-465-T; WSU-HEP-1607; arXiv:1611.09917
Journal ID: ISSN 2470-0010; PRVDAQ; 1501008
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review D; Journal Volume: 95; Journal Issue: 9
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS