Professor Alarcon’s research interests are the design, construction, and execution of experiments in basic nuclear science. He has carried out experiments designed to study the spin dependent electromagnetic response of few-body nuclei at the NIKHEF facility in the Netherlands and at the MIT-Bates Linear Accelerator Center. His present research activities are centered on experiments addressing fundamental issues of nuclear physics: the measurement of the parity-violating asymmetry in the capture of polarized neutrons by protons to determine the strength of the hadronic weak interaction; a precision measurement of the radiative decay of the neutron with the goal of improving the precision of quantities associated with the neutron decay; the measurement of electron and positron elastic scattering from hydrogen to determine the contribution of multiple-photon exchange in elastic lepton-nucleon scattering and address the present puzzle of the proton form factor ratio; and a search for the neutron electric dipole moment which possible existence is of fundamental interest and would significantly challenge the theoretical extensions of the Standard Model of particle physics. The experiments are taking place at the Spallation Neutron Source at ORNL, at the NIST facility, and at the DESY facility in Germany. He is also involved in the design and construction of a new kind of spectrometer for more precise measurements of neutron decay parameters to test the Standard Model.