We report the measurement of the beam-vector and tensor asymmetries AedV and AdT in quasielastic (e→,e′p) electrodisintegration of the deuteron at the MIT-Bates Linear Accelerator Center up to missing momentum of 500 MeV/c. Data were collected simultaneously over a momentum transfer range 0.1<Q2<0.5 (GeV/c)2 with the Bates Large Acceptance Spectrometer Toroid using an internal deuterium gas target polarized sequentially in both vector and tensor states. The data are compared with calculations. The beam-vector asymmetry AedV is found to be directly sensitive to the D-wave component of the deuteron and has a zero crossing at a missing momentum of about 320 MeV/c, as predicted. The tensor asymmetry AdT at large missing momentum is found to be dominated by the influence of the tensor force in the neutron-proton final-state interaction. The new data provide a strong constraint on theoretical models.
|Journal||Physical Review Letters|
|State||Published - Oct 30 2017|
Bibliographical noteFunding Information:
We thank the staff at the MIT-Bates Linear Accelerator Center for the high-quality electron beam and their technical support. We thank H. Arenhövel for many enlightening discussions. This work has been supported in part by the U.S. Department of Energy Office of Nuclear Physics and by the National Science Foundation.
© 2017 American Physical Society.
ASJC Scopus subject areas
- Physics and Astronomy (all)