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Defining the proton radius: A unified treatment.
- Source :
-
Physical Review C . Mar2019, Vol. 99 Issue 3, p1-1. 1p. - Publication Year :
- 2019
-
Abstract
- Background: There is significant current interest in knowing the value of the proton radius and also its proper definition. Purpose: Combine the disparate literatures of hydrogen spectroscopy and diverse modern parton distributions to understand the meaning of the proton radius in a manner consistent with the separate bodies of work. Methods: Use perturbation theory, light-front dynamics, and elementary techniques to find relativistically correct definitions of the proton radius and charge density. Results: It is found that the very same proton radius is accessed by measurements of hydrogen spectroscopy and elastic lepton scattering. The derivation of the mean-square radius as a moment of a spherically symmetric three-dimensional density is shown to be incorrect. A relativistically correct, two-dimensional charge density is related to the diverse modern literature of various parton distributions. Relativistically invariant moments thereof are derived in a new relativistic moment expansion, the RME. Conclusion: The equation rp2p =-6G'E(0) is the definition of the proton radius. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24699985
- Volume :
- 99
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Physical Review C
- Publication Type :
- Academic Journal
- Accession number :
- 135736846
- Full Text :
- https://doi.org/10.1103/PhysRevC.99.035202