Nuclear electromagnetic currents to fourth order in chiral effective field theory
arXiv:1902.06839 · doi:10.1007/s00601-019-1500-5
Abstract
Recently, we have shown that the continuity equation for the nuclear vector and axial current operators acquires additional terms if the latter depend on the energy transfer. We analyze in detail the electromagnetic single-nucleon four-current operators and verify the validity of the modified continuity equation for all one- and two-nucleon contributions up to fourth order in the chiral expansion. We also derive, for the first time, the leading contribution to the three-nucleon charge operator which appears at this order. Our study completes the derivation of the electroweak nuclear currents to fourth order in the chiral expansion.
18 pages, 3 figures
References in corpus (9)
- Improved chiral nucleon-nucleon potential up to next-to-next-to-next-to-leading order
- Subleading contributions to the chiral three-nucleon force I: long-range terms
- Peripheral nucleon-nucleon scattering at fifth order of chiral perturbation theory
- Electromagnetic Currents and Magnetic Moments in EFT
- Two-pion exchange electromagnetic current in chiral effective field theory using the method of unitary transformation
- Electromagnetic two-body currents of one- and two-pion range
- Two-pion exchange three-nucleon potential: O(q^4) chiral expansion
- Four-nucleon force using the method of unitary transformation
- Three-nucleon force at large distances: Insights from chiral effective field theory and the large-N_c expansion