Measurement of PV asymmetry in n+p→d+γ and γ+d→n+p |
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作者姓名: | 李永江 徐望 W. M. Snow CAI Xiao-Lu 范功涛 樊广伟 罗文 潘强岩 徐本基 杨利峰 阎喆 |
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作者单位: | Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; Indiana University, Bloomington, IN 47405, USA |
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基金项目: | Supported by One Hundred Person Project of Chinese Academy of Sciences (26010701); Knowledge Innovation Project of the Chinese Academy of Sciences (KJCX2-SW-N13); Pujiang Talent Project of the Shanghai Science and Technology Committee (06PJ14114); National Natural Science Foundation of China (10675156) |
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摘 要: | The measurement of parity-violating (PV) observables in few-nucleon system can shed light on our current understanding of the weak interaction between nucleons.Theoretical models describe the nucleonnucleon weak interaction at low energies use a series of undetermined parameters.Two parity violating measurements have been considered: the capture of polarized slow neutrons on hydrogen (n + p → d + γ) at Los Alamos National Laboratory for first phase and Oka Ridge National Laboratory for second phase and the helicity dependence of the deuteron photodisintegration cross section using circularly polarized photons (γ + d → n + p) at Shanghai Institute of Applied Physics.The goal of both experiments is to constraint the weak meson-nucleon couplings to a precision of 1 ×10^-8 .The introduction of both experiments is presented.
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关 键 词: | 测量 不对称 国家实验室 弱相互作用 光伏 D值 P值 洛斯阿拉莫斯 |
收稿时间: | 2010-03-04 |
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