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CryoEDM CryoEDM is a particle physics experiment aiming to measure the electric dipole moment (EDM) of the neutron to a precision of ~10−28ecm.〔A Proposal for a Cryogenic Experiment to Measure the Neutron Electric Dipole Moment (nEDM) 〕 ==The neutron electric dipole moment==
''For more information see Neutron electric dipole moment'' Although electrically neutral overall, the neutron is made up of charged quarks. An imbalance of charge on one side would cause a non-zero EDM. This would be a violation of parity (P) and time reversal (T) symmetries. A neutron EDM is believed to exist at some level to explain the matter-antimatter asymmetry of the Universe, although to date every measurement has given a value consistent with zero. Limits on the neutron EDM are a significant constraint on many particle physics theories. The Standard Model of Particle Physics predicts a value 10−31 – 10−32 ecm, while supersymmetric theories predict values in the range 10−25 – 10−28ecm.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「CryoEDM」の詳細全文を読む
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