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Title: Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory

Journal Article · · Physical Review. C
; ; ;

We extract the proton charge radius from the elastic form factor data using a theoretical framework combining chiral effective field theory and dispersion analysis. Complex analyticity in the momentum transfer correlates the behavior of the spacelike form factor in different Q2 regions and permits the use of data up to Q2 ~ 0.5 GeV2 in constraining the radius. The predictive theory describes the data with the same accuracy as current descriptive models (global fits). We obtain a radius of 0.844(7) fm, consistent with the high-precision muonic hydrogen results.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Lab.(ANL), Lemont, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-06OR23177; AC02-06CH11357; FPA2016-77313-P; FPA2016-75654-C2-2-P
OSTI ID:
1505247
Alternate ID(s):
OSTI ID: 1505160; OSTI ID: 1506417
Report Number(s):
JLAB-THY-18-2804; arXiv:1809.06373; DOE/OR/23177-4544; PRVCAN; 044303
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Vol. 99 Journal Issue: 4; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 40 works
Citation information provided by
Web of Science

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Figures / Tables (5)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 4)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 7)figure FIG. 5

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS