2026-06-27T10:49:26Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/1008092025-09-02T16:49:15Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Peset Martín, Clara María author Pineda, Antonio author Tomalak, Oleksandr 2024-02-09T10:15:11Z 2024-02-09T10:15:11Z 2021 Clara Peset, Antonio Pineda, Oleksandr Tomalak, The proton radius (puzzle?) and its relatives, Progress in Particle and Nuclear Physics, Volume 121, 2021, 103901, ISSN 0146-6410, https://doi.org/10.1016/j.ppnp.2021.103901. 0146-6410 10.1016/j.ppnp.2021.103901 https://hdl.handle.net/20.500.14352/100809 https://doi.org/10.1016/j.ppnp.2021.103901 We review determinations of the electric proton charge radius from a diverse set of low-energy observables. We explore under which conditions it can be related to Wilson coefficients of appropriate effective field theories. This discussion is generalized to other low-energy constants. This provides us with a unified framework to deal with a set of low-energy constants of the proton associated with its electromagnetic interactions. Unambiguous definitions of these objects are given, as well as their relation with expectation values of QCD operators. We show that the proton radius obtained from spectroscopy and lepton–proton scattering (when both the lepton and proton move with nonrelativistic velocities) is related to the same object of the underlying field theory with O(α) precision. The model dependence of these analyses is discussed. The prospects of constructing effective field theories valid for the kinematic configuration of present, or near-future, lepton–proton scattering experiments are explored. eng The proton radius (puzzle?) and its relatives journal article 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URL https://docta.ucm.es/bitstreams/4fb13274-9fa4-463f-bd13-403cbf5decf1/download File MD5 b269a54042206799d1f3068b4f1ee85c 3802207 application/pdf Proton_radius_(puzzle?)_and_its_relatives.pdf URL https://docta.ucm.es/bitstreams/8cd93dcb-032a-401d-be68-e173493ff6c9/download File MD5 ab00ba9721c3a5f446fea08b174b5416 217176 text/plain Proton_radius_(puzzle?)_and_its_relatives.pdf.txt