Status of the NPDGamma experiment
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- 作者：J. Fry ; R. Alarcon ; R. Allen ; E. Askanazi ; S. Balascuta…
- 关键词：Nucleon ; nucleon interactions ; Parity ; violation ; Nuclear tests of fundamental symmetries ; Few nucleon systems
- 刊名：Hyperfine Interactions
- 出版年：2017
- 出版时间：November 2017
- 年：2017
- 卷：238
- 期：1
- 全文大小：
- 刊物类别：Physics and Astronomy
- 刊物主题：Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics; Condensed Matter Physics; Surfaces and Interfaces, Thin Films;
- 出版者：Springer International Publishing
- ISSN：1572-9540
- 卷排序：238
文摘
The NPDGamma experiment measures the parity-violating (PV) gamma asymmetry from polarized cold neutrons captured on protons at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The (PV) neutron spin asymmetry Aγ of photons from polarized cold neutron capture on protons is proportional to the ΔI=1 long range weak meson coupling \(h_{\pi }^{1}\) between nucleons in the hadronic weak interaction (HWI). Liquid para-hydrogen production data taking concluded in April 2014 and once the background aluminum asymmetry measurements are complete, the PV asymmetry Aγ can be extracted. Preliminary results of the analysis of Aγ are presented.