An Improved Neutron Electric Dipole Moment Experiment

An Improved Neutron Electric Dipole Moment Experiment
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DOI:
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发表时间:
2008-06
期刊:
arXiv: Nuclear Experiment
影响因子:
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通讯作者:
M. Ku'zniak;I. Altarev;G. Ban;G. Bison;K. Bodek;M. Burghoff;M. Daum;K. Eberhardt;P. Fierlinger;E. Gutsmiedl;G. Hampel;W. Heil;R. Henneck;N. Khomutov;K. Kirch;S. Kistryn;S. Knappe-Grueneberg;A. Knecht;P. Knowles;J. Kratz;T. Lauer;B. Lauss;T. Lefort;A. Mtchedlishvili;O. Naviliat‐Cuncic;S. Paul;A. Pazgalev;G. Petzold;C. Plonka-Spehr;G. Qu'em'ener;D. Rebreyend;S. Roccia;G. Rogel;T. Sander-Thoemmes;A. Schnabel;N. Severijns;Y. Sobolev;R. Stoepler;L. Trahms;M. Tur;A. Weis;N. Wiehl;J. Zejma;G. Zsigmond
M. Ku'zniak;I. Altarev;G. Ban;G. Bison;K. Bodek;M. Burghoff;M. Daum;K. Eberhardt;P. Fierlinger;E. Gutsmiedl;G. Hampel;W. Heil;R. Henneck;N. Khomutov;K. Kirch;S. Kistryn;S. Knappe-Grueneberg;A. Knecht;P. Knowles;J. Kratz;T. Lauer;B. Lauss;T. Lefort;A. Mtchedlishvili;O. Naviliat‐Cuncic;S. Paul;A. Pazgalev;G. Petzold;C. Plonka-Spehr;G. Qu'em'ener;D. Rebreyend;S. Roccia;G. Rogel;T. Sander-Thoemmes;A. Schnabel;N. Severijns;Y. Sobolev;R. Stoepler;L. Trahms;M. Tur;A. Weis;N. Wiehl;J. Zejma;G. Zsigmond
中科院分区:
其他
文献类型:
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作者:
M. Ku'zniak;I. Altarev;G. Ban;G. Bison;K. Bodek;M. Burghoff;M. Daum;K. Eberhardt;P. Fierlinger;E. Gutsmiedl;G. Hampel;W. Heil;R. Henneck;N. Khomutov;K. Kirch;S. Kistryn;S. Knappe-Grueneberg;A. Knecht;P. Knowles;J. Kratz;T. Lauer;B. Lauss;T. Lefort;A. Mtchedlishvili;O. Naviliat‐Cuncic;S. Paul;A. Pazgalev;G. Petzold;C. Plonka-Spehr;G. Qu'em'ener;D. Rebreyend;S. Roccia;G. Rogel;T. Sander-Thoemmes;A. Schnabel;N. Severijns;Y. Sobolev;R. Stoepler;L. Trahms;M. Tur;A. Weis;N. Wiehl;J. Zejma;G. Zsigmond

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一个新的测量中子EDM,使用拉姆齐的分离振荡场的方法,是准备在新的高强度超冷中子源(UCN)在保罗谢勒研究所,维利根,瑞士(PSI)。一个非零nEDM的存在将违反宇称和时间反演对称性,并给出CPT定理,可能会导致新的CP破坏机制的发现。目前,《中国日报》(|DN| < 2.9 × 1026 ecm)限制了标准模型的某些扩展。新实验旨在将实验不确定性降低两个数量级,主要通过以下方式实现:(1)新PSI源提供的更高UCN通量,(2)通过改进的磁力测定法实现更好的磁场控制,以及(3)具有相反电场方向的双室配置。实验的第一阶段将使用RAL/Sussex/ILL小组的设备(目前最好的结果)的升级,从劳埃-朗之万研究所转移到PSI。最终的准确度将在进一步的步骤中通过目前处于设计阶段的新光谱仪来实现。
A new measurement of the neutron EDM, using Ramsey’s method of separated oscillatory fields, is in preparation at the new high intensity source of ultra-cold neutrons (UCN) at the Paul Scherrer Institute, Villigen, Switzerland (PSI). The existence of a non-zero nEDM would violate both parity and time reversal symmetry and, given the CPT theorem, might lead to a discovery of new CP violating mechanisms. Already the current upper limit for the nEDM (|dn| < 2.9 × 10 26 ecm) constrains some extensions of the Standard Model. The new experiment aims at a two orders of magnitude reduction of the experimental uncertainty, to be achieved mainly by (1) the higher UCN flux provided by the new PSI source, (2) better magnetic field control with improved magnetometry and (3) a double chamber configuration with opposite electric field directions. The first stage of the experiment will use an upgrade of the RAL/Sussex/ILL group’s apparatus (which has produced the current best result) moved from Institut Laue-Langevin to PSI. The final accuracy will be achieved in a further step with a new spectrometer, presently in the design phase.