Tagged EMC Measurements on Light Nuclei

Abstract

We propose to measure tagged deep inelastic scattering from light nuclei (deuterium and ${}^4$He) by detecting the low energy nuclear spectator recoil (p, ${}^3$H and ${}^3$He) in addition to the scattered electron. The proposed experiment will provide stringent tests leading to clear differentiation between the many models describing the EMC effect, by accessing the bound nucleon virtuality through its initial momentum at the point of interaction. Indeed, conventional nuclear physics explanations of the EMC effect mainly based on Fermi motion and binding effects yield very different predictions than more exotic scenarios, where bound nucleons basically loose their identity when embedded in the nuclear medium. By distinguishing events where the interacting nucleon was slow, as described by a mean field scenario, or fast, very likely belonging to a correlated pair, will clearly indicate which phenomenon is relevant to explain the EMC effect. An important challenge for such measurements using nuclear spectators is the control of the theoretical framework and, in particular, final state interactions. This experiment will directly provide the necessary data needed to test our understanding of spectator tagging and final state interactions in ${}^2$H and ${}^4$He and their impact on the semi-inclusive measurements of the EMC effect described above.

References in corpus (10)

• Momentum sharing in imbalanced Fermi systems
• Measurement of 2- and 3-Nucleon Short Range Correlation Probabilities in Nuclei
• Observation of Nuclear Scaling in the $A(e,e^{\prime })$ Reaction at $x_B>$1
• Nuclear Antishadowing in Neutrino Deep Inelastic Scattering
• Measurement of the neutron F2 structure function via spectator tagging with CLAS
• Electron Scattering From High-Momentum Neutrons in Deuterium
• Model independent method for determination of the DIS structure of free neutron
• Final-state interactions in semi-inclusive deep inelastic scattering off the Deuteron
• A non factorized calculation of the process ^3He(e,e'p)^2H at medium energies
• Distorted spin-dependent spectral function of an A=3 nucleus and semi-inclusive deep inelastic scattering processes

Cited by in corpus (3)

• Polarized electron-deuteron deep-inelastic scattering with spectator nucleon tagging
• Neutron spin structure from polarized deuteron DIS with proton tagging
• The neutron and proton mass radii from the vector meson photoproduction data on the deuterium target