大动量转移下弹性电子 - 氘核散射中张量极化的测量。

Measurement of tensor polarization in elastic electron-deuteron scattering at large momentum transfer.

作者信息

Abbott D, Ahmidouch A, Anklin H, Arvieux J, Ball J, Beedoe S, Beise EJ, Bimbot L, Boeglin W, Breuer H, Brindza P, Carlini R, Chant NS, Danagoulian S, Dow K, Ducret J, Dunne J, Ewell L, Eyraud L, Furget C, Garcon M, Gilman R, Glashausser C, Gueye P, Gustafsson K, Hafidi K

机构信息

Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.

出版信息

Phys Rev Lett. 2000 May 29;84(22):5053-7. doi: 10.1103/PhysRevLett.84.5053.

DOI:10.1103/PhysRevLett.84.5053

PMID:10990865

Abstract

Tensor polarization observables ( t(20), t(21), and t(22)) have been measured in elastic electron-deuteron scattering for six values of momentum transfer between 0.66 and 1.7 (GeV/c)(2). The experiment was performed at the Jefferson Laboratory in Hall C using the electron High Momentum Spectrometer, a specially designed deuteron magnetic channel and the recoil deuteron polarimeter POLDER. The new data determine to much larger Q2 the deuteron charge form factors G(C) and G(Q). They are in good agreement with relativistic calculations and disagree with perturbative QCD predictions.

摘要

在弹性电子 - 氘核散射中，针对动量转移在0.66至1.7（GeV/c）²之间的六个值，测量了张量极化可观测量（t(20)、t(21)和t(22)）。该实验在杰斐逊实验室的C厅进行，使用了电子高动量谱仪、专门设计的氘核磁通道以及反冲氘核偏振仪POLDER。新数据在大得多的Q²下确定了氘核电荷形状因子G(C)和G(Q)。它们与相对论计算结果吻合良好，与微扰量子色动力学的预测结果不符。