研究目的
Examining the role of strong coupling when the nuclear many-body system is probed electromagnetically in the DIS limit.
研究成果
The leading result for the nucleus R-ratio is independent of the hard conformal scaling factor, and supports a depletion at intermediate x and an enhancement at large x which are the hallmarks of the EMC effect. The depletion appears to be stronger for lighter nuclei if only the surface effects are taken into account with the same binding for all nuclei. A key feature of the holographic forward Compton scattering on the nucleus in the DIS kinematics is that in the leading density approximation the hard virtual photon scatters coherently off each nucleon by exciting it to high energy and therefore small size, without breaking it.
研究不足
The calculation was restricted to the leading density contribution and to light nuclei. The depletion appears stronger for lighter nuclei if only the surface effects are taken into account with the same binding for all nuclei. A more realistic A-dependence of the binding energy, e.g., using a shell model, is expected to change this.
