Proton remains puzzling
- Duke Univ., Durham, NC (United States); Duke Kunshan Univ., Kunshan, Jiangsu (Rep. of Korea)
- Duke Univ., Durham, NC (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Nucleons are building blocks of visible matter, and are responsible for more than 99% of the visible mass in the universe despite the fact that the discovery of the Higgs boson is almost irrelevant to the origin of the proton mass. While major progress has been made in the last two decades in understanding the proton spin puzzle discovered in the late 1980s by the European Muon Collaboration, a new proton puzzle emerged in the last several years concerning the proton charge radius, which is the charge weighted size of the proton. In this paper we will review the latest situation concerning the proton charge radius, mass and spin, and discuss upcoming new experiments addressing these puzzles, as well as implications for new physics.
- Research Organization:
- Duke Univ., Durham, NC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- FG02-03ER41231
- OSTI ID:
- 1595179
- Journal Information:
- The Universe, Vol. 3, Issue 2; ISSN 9999-0040
- Publisher:
- Asian Pacific Organization for Cosmology and Particle Astrophysics - APCosPA and Taipei National Taiwan UniversityCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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