DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electromagnetic radii of the nucleon in soft-wall holographic QCD

Journal Article · · Nuclear Physics. B
ORCiD logo [1];  [2]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
  2. Stony Brook University, NY (United States)

We revisit the electromagnetic form factors of the proton and neutron in the original-minimal soft-wall holographic QCD, which has only two parameters, i.e., the mass scale κ and the twist parameter of the nucleon τ. We first fix τ = 3 by the hard scattering rule, and extract κ = 0.402 GeV from the world data (including the Mainz A1 data) of the Sachs magnetic form factor of the proton G$$^{p}_{M}$$. We then predict among others, the charge radius of the proton to be rp = 0.831 ± 0.008 fm, in perfect agreement with the recent charge radius of the proton measured by the PRad collaboration at Jefferson Lab, and in agreement with the muonic hydrogen experiments. Our prediction for the proton elastic form factor ratio μpG$$^{p}_{E}$$/G$$^{p}_{M}$$ is also in very good agreement with the recent high precision Jefferson Lab recoil polarization experiment E08-007 for Q2 = 0.3 – 0.6 GeV2, and with the recent high precision Mainz A1 experiment for Q2 < 0.13 GeV2.

Research Organization:
Stony Brook Univ., NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
FG02-88ER40388; AC02-06CH11357; 2020-0020; FG-88ER40388
OSTI ID:
2205137
Alternate ID(s):
OSTI ID: 2280637
Journal Information:
Nuclear Physics. B, Vol. 997; ISSN 0550-3213
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (40)

Consistency of electron scattering data with a small proton radius journal June 2016
Anti-de Sitter space, thermal phase transition, and confinement in gauge theories journal January 1998
The proton charge radius journal January 2022
Ab Initio Determination of Light Hadron Masses journal November 2008
Two-photon frequency comb spectroscopy of atomic hydrogen journal November 2020
Exclusive processes in perturbative quantum chromodynamics journal November 1980
The Rydberg constant and proton size from atomic hydrogen journal October 2017
Nucleon mass radii and distribution: Holographic QCD, lattice QCD, and GlueX data journal May 2021
Electric and magnetic form factors of the proton journal July 2014
Baryons in AdS/QCD journal March 2007
Polarization Transfer in the He 4 ( e → , e ′ p → ) H 3 Reaction at Q 2 = 0.8 and 1.3     ( GeV / c ) 2 journal August 2010
High-precision determination of the electric and magnetic radius of the proton journal May 2021
High-Precision Determination of the Electric and Magnetic Form Factors of the Proton journal December 2010
Proton radius from electron scattering data journal May 2016
Proton Structure from the Measurement of 2S-2P Transition Frequencies of Muonic Hydrogen journal January 2013
The proton radius puzzle journal May 2015
The size of the proton journal July 2010
Deep inelastic scattering of baryons in a modified soft wall model journal December 2012
Generalized Vector Dominance Theory and Vertex Functions journal June 1970
Charge radii of the nucleon from its flavor dependent Dirac form factors journal February 2021
Introduction to the AdS/CFT Correspondence journal January 2015
The proton radius puzzle – 9 years later journal January 2020
High-precision measurement of the proton elastic form factor ratio μpGE/GM at low Q2 journal November 2011
Generalized parton distributions in AdS/QCD journal February 2011
Proton radius from electron-proton scattering and chiral perturbation theory journal March 2017
The large $N$ limit of superconformal field theories and supergravity journal January 1998
Reduction of the proton radius discrepancy by 3 σ journal October 2014
A small proton charge radius from an electron–proton scattering experiment journal November 2019
Light scalar mesons in the soft-wall model of AdS/QCD journal September 2008
New physics and the proton radius problem journal August 2012
Observation of Anomalous Internal Pair Creation in Be 8 : A Possible Indication of a Light, Neutral Boson journal January 2016
Large N field theories, string theory and gravity journal January 2000
Simple parametrization of nucleon form factors journal December 2004
CODATA Recommended Values of the Fundamental Physical Constants: 2014 journal December 2016
Precise determination of the proton magnetic radius from electron scattering data journal September 2020
Chiral condensate in holographic models of QCD journal April 2009
Holographic glueball structure journal July 2008
New Measurement of the 1 S − 3 S Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle journal May 2018
A measurement of the atomic hydrogen Lamb shift and the proton charge radius journal September 2019
Nucleon electromagnetic and gravitational form factors from holography journal June 2009