Speaker
Description
Using known methods now significantly improvable because of recent advances in the input data, we obtain the currently most accurate calculation of the hyperfine splitting (HFS) in muonic hydrogen. The crucial part of the calculation is the hadronic or proton structure dependent two photon exchange correction, which is calculated in a data driven approach that uses the proton electromagnetic form factors and spin-dependent structure functions as input. One begins with the 12-figure-accurate measurement of the HFS in ordinary hydrogen and obtains the bulk of the muonic hydrogen result by scaling with the reduced mass. The corrections to this scaling are small and calculable with the stated input, and yield uncertainty limits that are much reduced compared those from a stand-alone calculation of muonic hydrogen HFS.
