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

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Lab.(ANL), Lemont, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1505247
Alternate Identifier(s):
OSTI ID: 1505160; OSTI ID: 1506417
Report Number(s):
JLAB-THY-18-2804; arXiv:1809.06373; DOE/OR/23177-4544
Journal ID: ISSN 2469-9985; PRVCAN; 044303
Grant/Contract Number:  
AC05-06OR23177; AC02-06CH11357; FPA2016-77313-P; FPA2016-75654-C2-2-P
Resource Type:
Published Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Name: Physical Review C Journal Volume: 99 Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Alarcón, J. M., Higinbotham, D. W., Weiss, C., and Ye, Zhihong. Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.044303.
Alarcón, J. M., Higinbotham, D. W., Weiss, C., & Ye, Zhihong. Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory. United States. doi:10.1103/PhysRevC.99.044303.
Alarcón, J. M., Higinbotham, D. W., Weiss, C., and Ye, Zhihong. Fri . "Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory". United States. doi:10.1103/PhysRevC.99.044303.
@article{osti_1505247,
title = {Proton charge radius extraction from electron scattering data using dispersively improved chiral effective field theory},
author = {Alarcón, J. M. and Higinbotham, D. W. and Weiss, C. and Ye, Zhihong},
abstractNote = {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.},
doi = {10.1103/PhysRevC.99.044303},
journal = {Physical Review C},
number = 4,
volume = 99,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevC.99.044303

Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Light shaded bands between solid lines (labeled “Theory”): DIχEFT predictions of the proton charge FF $G^{p}_{E}$ (Q2) for several values of the proton radius, r$^{p}_{E}$ = (0.80, 0.82, 0.84, 0.86, 0.88, 0.90) fm (the values are indicated on the panels). The bands show the theoretical uncertainty resulting frommore » the effective description of high-mass states in the spectral function (see text). Dark shaded bands (labeled “Global Fit”):$G^{p}_{E}$ (Q2) determined from global fits of the elastic FF data with constrained proton radius (see text). The bands show the experimental and fit uncertainties. Each panel’s global fit was restricted to reproduce the indicated proton radius.« less

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    Works referencing / citing this record:

    A small proton charge radius from an electron–proton scattering experiment
    journal, November 2019


    Hyperfine structure of P states in muonic ions of lithium, beryllium, and boron
    journal, December 2019


    Leading order corrections to the Bethe-Heitler process in the γ p l + l p reaction
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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.