Transverse AsymmetryAT′from the Quasielastic3

Abstract

The electromagnetic form factors of the nucleon have been a long-standing subject of interest in nuclear and particle physics. They describe the distribution of charge and magnetization within nucleons and allow sensitive tests of nucleon models based on quantum chromodynamics. This advances our knowledge of nucleon structure and provides a basis for the understanding of more complex strongly interacting matter in terms of quark and gluon degrees of freedom.The neutron form factors are known with much poorer precision than proton form factors because of the lack of free neutron targets. Over the past decade, with the advent of polarized beams and targets, the precise determination of both the neutron electric form factor, G n E , and the magnetic form factor, G n M , has become a focus of experimental activity. Considerable attention has been devoted to the precise measurement of G n M . While knowledge of G

Role of mesons in the electromagnetic form factors of the nucleon

“…All of the G n M data [36,[56][57][58][59][60][61][62][63][64][65][66], except the recent JLab data [67,68], were used in the 2005 fit. As seen in [26] and the Galster et al [27] parametrization with the fitted data (Madey et al [52] and Warren et al [53]; see the end of Sec.…”

Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the ReactionHe3↑(e,Zhang1, Long2, Mihovilovič3 et al. 2015Phys. Rev. Lett.Self Cite352361View full textAdd to dashboardCite

“…At the lowest value of Q 2 , where nuclear effects may be important, f n was calculated using a nonrelativistic model of the 3 He nucleus from Deltuva [21][22][23][24] based on the CD-Bonn þ Δ potential. The model uncertainty is 3.8% (rel) based on a study of the model dependence of f n at Q 2 ≈ 1 GeV 2 in a previous 3 Heðe; e 0 Þ measurement by this collaboration [25].…”

Pressure dependence of wall relaxation in polarizedHe3gaseous cells

“…Spin-polarized 3 He gas has been widely used in polarized nuclear targets for lepton scattering experiments [1] and as a signal source in magnetic resonance imaging (MRI) of lung air space [2]. Recently, it has also been used in searches of exotic spin-dependent interactions [3].…”