scholarly journals Full QCD calculation of neutron electric dipole moment with the external electric field method

2008 ◽  
Vol 78 (1) ◽  
Author(s):  
E. Shintani ◽  
S. Aoki ◽  
Y. Kuramashi
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
External Electric Field ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Field Method ◽  
Neutron Electric Dipole Moment ◽  
Electric Field Method

scholarly journals Elementary quantum mechanics of the neutron with an electric dipole moment

2016 ◽  
Vol 113 (27) ◽  
pp. 7438-7442 ◽  
Author(s):  
Gordon Baym ◽  
D. H. Beck
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
External Electric Field ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Time Reversal ◽  
Spin Operator ◽  
Spin Motion ◽  
Expectation Value ◽  
Electric Polarizability

The neutron, in addition to possibly having a permanent electric dipole moment as a consequence of violation of time-reversal invariance, develops an induced electric dipole moment in the presence of an external electric field. We present here a unified nonrelativistic description of these two phenomena, in which the dipole moment operator, D→, is not constrained to lie along the spin operator. Although the expectation value of D→ in the neutron is less than 10−13 of the neutron radius, rn, the expectation value of D→ 2 is of order rn2. We determine the spin motion in external electric and magnetic fields, as used in past and future searches for a permanent dipole moment, and show that the neutron electric polarizability, although entering the neutron energy in an external electric field, does not affect the spin motion. In a simple nonrelativistic model we show that the expectation value of the permanent dipole is, to lowest order, proportional to the product of the time-reversal-violating coupling strength and the electric polarizability of the neutron.

scholarly journals Neutron electric dipole moment using lattice QCD simulations at the physical point

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
C. Alexandrou ◽  
A. Athenodorou ◽  
K. Hadjiyiannakou ◽  
A. Todaro
Keyword(s):  
Dipole Moment ◽  
Lattice Qcd ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Physical Point

scholarly journals Grand unification, the neutron electric dipole moment and galaxy formation

Nature ◽  
1981 ◽  
Vol 293 (5827) ◽  
pp. 41-43 ◽  
Author(s):  
John Ellis ◽  
Mary K. Gaillard ◽  
D. V. Nanopoulos ◽  
Serge Rudaz
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Galaxy Formation ◽  
Electric Dipole ◽  
Grand Unification ◽  
Neutron Electric Dipole Moment
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