Ito T M, Averett T, Barkhuff D, Batigne G, Beck D H, Beise E J, Blake A, Breuer H, Carr R, Clasie B, Covrig S, Danagoulian A, Dodson G, Dow K, Dutta D, Farkhondeh M, Filippone B W, Franklin W, Furget C, Gao H, Gao J, Gustafsson K, Hannelius L, Hasty R, Hawthorne-Allen A M, Herda M C, Jones C E, King P, Korsch W, Kowalski S, Kox S, Kramer K, Lee P, Liu J, Martin J W, McKeown R D, Mueller B, Pitt M L, Plaster B, Quéméner G, Réal J-S, Ritter J, Roche J, Savu V, Schiavilla R, Seely J, Spayde D, Suleiman R, Taylor S, Tieulent R, Tipton B, Tsentalovich E, Wells S P, Yang B, Yuan J, Yun J, Zwart T
W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
Phys Rev Lett. 2004 Mar 12;92(10):102003. doi: 10.1103/PhysRevLett.92.102003. Epub 2004 Mar 10.
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2=0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2=0.091 (GeV/c)2, which are also consistent with theoretical predictions.
我们报告了在向后角度下，对氘核进行的准弹性电子散射中宇称破坏不对称性的新测量，此时(Q^2 = 0.038 (GeV/c)^2)。这个量提供了对核子中性弱轴矢量形状因子的测定，该因子可能会受到较大的电弱修正。测量得到的不对称性(A = -3.51 ± 0.57)（统计）(± 0.58)（系统）ppm与理论预测一致。我们还报告了先前在(Q^2 = 0.091 (GeV/c)^2)实验的更新结果，这些结果也与理论预测一致。
