Polarized parity violating electron scattering on 3He

✍ Scribed by S.L. Mintz; G.M. Gerstner; M.A. Barnett; M. Pourkaviani

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 578 KB
• Volume: 650
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(99)00123-2

✦ Synopsis

We calculate the asymmetry parameters, A, and figures-of-merit for polarized parity violating electron scattering from 3He via the reaction, e-+3 He ~ e-+3 He. We do this explicitly for incident electron energies of 1.0 GeV and 4.0 GeV. We find a sharp and unexpected variation in A due to cancellations between the weak and electromagnetic form factors caused by the different q2 dependences of these form factors. We find that at small angles, the asymmetry may be obtained to reasonably high accuracy for all energies considered and that the interesting region where the asymmetry has its first maximum and minimum is accessible for electron energies of 1 GeV or higher. In addition we find that the asymmetry and figures-of-merit are in the range of those for other proposed target nuclei. We also consider the possibility of strange quark contributions to the asymmetry and show that at the first maxima and minima, possible contributions of the strange quark current vector form factors cause large variations in the asymmetry which might be observed.