2026-06-08T03:26:16Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/1009952025-08-28T14:53:19Zcom_20.500.14352_14col_20.500.14352_15
The two-photon exchange contribution to muonic hydrogen from chiral perturbation theory
Peset Martín, Clara María
Pineda, Antonio
53
Proton polarizability contribution
Virtual Compton-scattering
Baryon axial currents
Lamb shift
Hyperfine structure
Form-factors
Low energies
Nucleon
Particles
Radius
Física (Física)
22 Física
We compute the spin-dependent and spin-independent structure functions of the forward virtual-photon Compton tensor of the proton at using heavy baryon effective theory including the Delta particle. We compare with previous results when existing. Using these results we obtain the leading hadronic contributions, associated to the pion and Delta particles, to the Wilson coefficients of the lepton–proton four fermion operators in NRQED. The spin-independent coefficient yields a pure prediction for the two-photon exchange contribution to the muonic hydrogen Lamb shift, . We also compute the charge, , and Zemach, , moments for . Finally, we discuss the spin-dependent case, for which we compute the difference between the four-fermion Wilson coefficients relevant for hydrogen and muonic hydrogen.
Ministerio de Ciencia e Innovación (España)
Depto. de Física Teórica
Fac. de Ciencias Físicas
TRUE
pub
2024-02-09T14:56:57Z
2024-02-09T14:56:57Z
2014
journal article
VoR
https://hdl.handle.net/20.500.14352/100995
0550-3213
10.1016/j.nuclphysb.2014.07.027
1873-1562
eng
info:eu-repo/grantAgreement/MICINN/FPA2010-16963
info:eu-repo/grantAgreement/MICINN/FPA2011-25948
info:eu-repo/grantAgreement/SGR2014-1450
Peset, Clara, y Antonio Pineda. «The Two-Photon Exchange Contribution to Muonic Hydrogen from Chiral Perturbation Theory». Nuclear Physics B, vol. 887, octubre de 2014, pp. 69-111. DOI.org (Crossref), https://doi.org/10.1016/j.nuclphysb.2014.07.027.
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
open access
application/pdf
Elsevier