RT Journal Article
T1 The two-photon exchange contribution to muonic hydrogen from chiral perturbation theory
A1 Peset Martín, Clara María
A1 Pineda, Antonio
AB 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.
PB Elsevier
SN 0550-3213
YR 2014
FD 2014-08-07
LK https://hdl.handle.net/20.500.14352/100995
UL https://hdl.handle.net/20.500.14352/100995
LA eng
NO 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.
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 17 abr 2025