Lower bound on the proton charge radius from electron scattering data

Hagelstein, Franziska; Pascalutsa, Vladimir (2019). Lower bound on the proton charge radius from electron scattering data. Physics letters. B, 797, p. 134825. Elsevier 10.1016/j.physletb.2019.134825

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The proton charge-radius determinations from the electromagnetic form-factor measurements in electron-proton (ep) scattering require an extrapolation to zero momentum transfer Q² = 0 which is prone to model-dependent assumptions. We show that the data at finite momentum transfer can be used to establish a rigorous lower bound on the proton charge radius, while bypassing the model-dependent assumptions that go into the fitting and extrapolation of the ep data. The near-future precise ep experiments at very low Q², such as PRad, are expected to set a stringent lower bound on the proton radius.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Hagelstein, Franziska Elfriede

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

05 Nov 2019 09:28

Last Modified:

10 Nov 2019 02:45

Publisher DOI:

10.1016/j.physletb.2019.134825

ArXiv ID:

1812.02028

BORIS DOI:

10.7892/boris.134186

URI:

https://boris.unibe.ch/id/eprint/134186

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