Measurement of double-polarization asymmetries in the quasielastic (3)He[â](e[â],e(')d) process.
Phys Rev Lett
; 113(23): 232505, 2014 Dec 05.
Article
em En
| MEDLINE
| ID: mdl-25526124
ABSTRACT
We present a precise measurement of double-polarization asymmetries in the ^{3}He[over â](e[over â],e^{'}d) reaction. This particular process is a uniquely sensitive probe of hadron dynamics in ^{3}He and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasielastic kinematics at Q^{2}=0.25(GeV/c)^{2} for missing momenta up to 270 MeV/c. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on p_{m} and ω, but are systematically offset. Beyond the region of the quasielastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two-and/or three-body dynamics is required.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article