May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Two-Photon Effects in Elastic Nucleon Form Factors

May 31, 2018, 2:00 PM
South Foyer | Nopales Room (Hyatt Regency Indian Wells Conference Center)

South Foyer | Nopales Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA


Prof. Marc Vanderhaeghen (University Mainz)


In view of the proton radius puzzle and the precision currently achieved in extracting the proton radius from muonic Hydrogen spectroscopy, the two-photon exchange (TPE) corrections between the lepton and hadron are at present the largest source of hadronic uncertainty. I present an overview on recent work within a dispersion relation framework to estimate such TPE corrections both in elastic electron-proton and muon-proton scattering as well as in the interpretation of the muonic Hydrogen spectroscopy. The results are compared to recent CLAS, VEPP-3 and OLYMPUS data as well as to a full TPE calculation in the near-forward approximation, based on unpolarized structure function input. The next steps in this field will be discussed.
E-mail [email protected]

Primary author

Prof. Marc Vanderhaeghen (University Mainz)

Presentation materials