Speaker
Pablo Sanchez-Puertas
(IFAE)
Description
Extremely precise measurements in muonic hydrogen allow to extract properties from the proton, due to its impact on the energy levels. Such extractions require however from a commensurate precision for other contributions affecting the energy levels, such as two-photon exchange effects. In this talk, we compute the axial-vector meson contribution to the hyperfine splitting of muonic hydrogen, that is relevant to assess the proton Zemach radius, finding significant differences with respect to previous estimates.
