2016/12/21 by B. Demissie, Demissie, Berhan, Harald W. Grießhammer +1
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Physics and Applications #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · pdf · doi:10.48550/arxiv.1612.07351
openalex publication_date 2016/12/21 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
Compton scattering processes are ideal to study electric and magnetic dipole polarizabilities of nucleons. These fundamental quantities parametrize the responses of the internal degrees of freedoms to a monochromatic photon probe. In this work, the inelastic channel γd→ γnp is treated in χEFT, with a focus on the kinematic region of the neutron quasi-free peak, where the momentum of the outgoing proton is small enough that it is considered to remain at rest. This provides access to the Compton scattering process γn → γn, from which the scalar polarizabilites of the neutron, αE1 and βM1, are extracted. Using χEFT, triple differential cross-sections d3σ/dEndΩγ' Ωn in the photon energy range of 200-to-400 MeV are computed. The biggest contribution comes from the impulse approximation, with small corrections stemming from final state interactions, meson exchange currents and rescattering. In this presentation, we report progress and preliminary results.