학술논문
Measurement of the Vector and Tensor Asymmetries at Large Missing Momentum in Quasielastic $(\vec{e}, e^{\prime}p)$ Electron Scattering from Deuterium
Document Type
Working Paper
Author
DeGrush, A.; Maschinot, A.; Akdogan, T.; Alarcon, R.; Bertozzi, W.; Booth, E.; Botto, T.; Calarco, J. R.; Clasie, B.; Crawford, C.; Dow, K.; Farkhondeh, M.; Fatemi, R.; Filoti, O.; Franklin, W.; Gao, H.; Geis, E.; Gilad, S.; Hasell, D. K.; Karpius, P.; Kohl, M.; Kolster, H.; Lee, T.; Matthews, J.; McIlhany, K.; Meitanis, N.; Milner, R.; Rapaport, J.; Redwine, R.; Seely, J.; Shinozaki, A.; Sindile, A.; Sirca, S.; Six, E.; Smith, T.; Tonguc, B.; Tschalar, C.; Tsentalovich, E.; Turchinetz, W.; Xiao, Y.; Xu, W.; Zhou, Z. -L.; Ziskin, V.; Zwart, T.
Source
Phys. Rev. Lett. 119, 182501 (2017)
Subject
Language
Abstract
We report the measurement of the beam-vector and tensor asymmetries $A^V_{ed}$ and $A^T_d$ in quasielastic $(\vec{e}, e^{\prime}p)$ 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 $0.1< Q^2<0.5$~(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 $A^V_{ed}$ is found to be directly sensitive to the $D$-wave component of the deuteron and have a zero-crossing at a missing momentum of about 320~MeV/c, as predicted. The tensor asymmetry $A^T_d$ 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.
Comment: 5 pages, 3 figures
Comment: 5 pages, 3 figures