Maurik Holtrop's research at UNH focuses on the field of nuclear and particle physics. He serves as principal investigator of the Nuclear and Particle Physics Group in the Physics Department. He is currently involved in electron and photon scattering experiments at the Thomas Jefferson National Accelerator Facility (TJNAF or Jlab), more specifically in Hall-B using the CLAS detector.

Professor Holtrop is one of the spokespersons of the Heavy Photon Search (HPS) experiment (E12-11-006) at Jefferson Lab. This experiment looks for a new gauge boson, the “heavy photon” or “dark photon,” which could be part of a hidden sector that also includes potential dark matter candidates. He is also a member of the CLAS and CLAS12 experiments, where is a co-spokesman for experiments E12-06-106, “Study of Color Transparency in Exclusive Vector Meson Electroproduction off Nuclei”, E12-06-117, “Quark Propagation and Hadron Formation”, E12-06-119, “Deeply Virtual Compton Scattering with CLAS at 11 GeV”, and E12-06-109, “The Longitudinal Spin Structure of the Nucleon."