Towards a new measurement of the neutron electric dipole moment
Towards a new measurement of the neutron electric dipole moment
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DOI：
10.1007/s10751-007-9522-7
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发表时间：
2006-09
影响因子：
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通讯作者：
G. Ban;K. Bodek;M. Daum;R. Henneck;S. Heule;M. Kasprzak;N. Khomytov;K. Kirch;A. Knecht;S. Kistryn;P. Knowles;M. Kuźniak;T. Lefort;O. Naviliat-Cuncic;A. Pichlmaier;C. Plonka;G. Quéméner;M. Rebetez;D. Rebreyend;G. Rogel;B. Sabirov;M. Tur;A. Weis;J. Zejma
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文献类型：
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作者：
G. Ban;K. Bodek;M. Daum;R. Henneck;S. Heule;M. Kasprzak;N. Khomytov;K. Kirch;A. Knecht;S. Kistryn;P. Knowles;M. Kuźniak;T. Lefort;O. Naviliat-Cuncic;A. Pichlmaier;C. Plonka;G. Quéméner;M. Rebetez;D. Rebreyend;G. Rogel;B. Sabirov;M. Tur;A. Weis;J. Zejma
粒子电偶极矩（EDMs）的精确测量为寻找T（或CP）违反的非标准机制提供了极其灵敏的手段。对于中子电火花加工，上限在50年内降低了8个数量级，从而排除了几种CP违反情况。我们在这里报告了一项新的努力，旨在将中子电火花加工极限提高两个数量级，降低到3 × 10−28e·cm的水平。该方法的两个核心要素是使用更高的密度，这将在Paul Scherrer研究所的新的专用散裂UCN源上提供，以及优化真空Ramsey共振技术，在室温下使用存储室，以达到新的灵敏度极限。
Precision measurements of particle electric dipole moments (EDMs) provide extremely sensitive means to search for non-standard mechanisms of T (or CP) violation. For the neutron EDM, the upper limit has been reduced by eight orders of magnitude in 50 years thereby excluding several CP violation scenarios. We report here on a new effort aiming at improving the neutron EDM limit by two orders of magnitude, down to a level of 3 × 10−28e·cm. The two central elements of the approach are the use of the higher densities which will be available at the new dedicated spallation UCN source at the Paul Scherrer Institute, and the optimization of the in-vacuum Ramsey resonance technique, with storage chambers at room temperature, to reach new limits of sensitivity.