Speaker: Saori Pastore (Old Dominion University)

Title: Nuclear electromagnetic two-body currents

Abstract: 

The nuclear electromagnetic current operator is derived in 
time-ordered perturbation theory in an effective-field-theory
framework with pions, nucleons, and Delta-isobars up to one 
loop corrections, {\it i.e.} up to next-to-next-to-next-to-leading
order (N$^3$LO) in the chiral expansion. The N$^2$LO current
operator is used to evaluate transition matrix elements between
wave functions derived from realistic Hamiltonians with two- 
and three-body potentials. A number of electromagnetic observables
including A$=2,3$ nuclei magnetic moments and cross sections for
radiative captures of thermal neutron on deuteron and triton are
discussed.