Proton structure in muonic hydrogen Lamb shift

Calculations of proton structure effects in muonic hydrogen Lamb shift, based on dispersion theory [1,2] and chiral perturbation theory [3,4], will be presented within the context of the ``proton charge radius puzzle.'' \\[4pt] [1] C.E.~Carlson \& M.~Vanderhaeghen: Phys.Rev.\ A84 (2011) 020102\\[0pt] [2] C.E.~Carlson, M.~Gorchtein \& M.~Vanderhaeghen: Phys.Rev.\ A89 (2014) 022504\\[0pt] [3] J.M.~Alarcon, V.~Lensky \& V.~Pascalutsa: Eur.Phys.J.\ C74 (2014) 2852\\[0pt] [4] V.~Lensky, J.M.~Alarcon \& V.~Pascalutsa: arXiv:1407.2574