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Title: Nucleon spin-averaged forward virtual Compton tensor at large Q 2

Here, 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:
 [1] ;  [2]
  1. Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada); TRIUMF, Vancouver, BC (Canada); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); The Univ. of Chicago, Chicago, IL (United States)
  2. Wayne State Univ., Detroit, MI (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-16-465-T; WSU-HEP-1607; arXiv:1611.09917
Journal ID: ISSN 2470-0010; PRVDAQ; 1501008
Grant/Contract Number:
AC02-07CH11359; FG02-13ER41958; SC0009924
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (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
OSTI Identifier:
1345627
Alternate Identifier(s):
OSTI ID: 1358646