The Electric Dipole Form Factor of the Nucleon in Chiral Perturbation Theory to Sub-leading Order
Oct, 2010
6 pages
Published in:
- Phys.Lett.B 696 (2011) 97-102
- Published: Jan 24, 2011
e-Print:
- 1010.4078 [hep-ph]
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Abstract: (Elsevier)
The electric dipole form factor (EDFF) of the nucleon stemming from the QCD θ¯ term and from the quark color-electric dipole moments is calculated in chiral perturbation theory to sub-leading order. This is the lowest order in which the isoscalar EDFF receives a calculable, non-analytic contribution from the pion cloud. In the case of the θ¯ term, the expected lower bound on the deuteron electric dipole moment is |dd|≳1.4⋅10−4θ¯e fm . The momentum dependence of the isovector EDFF is proportional to a non-derivative time-reversal-violating pion-nucleon coupling, and the scale for momentum variation—appearing, in particular, in the radius of the form factor—is the pion mass.- Time reversal violation
- Nucleon electric dipole moment
- Nucleon electric dipole form factor
- Quark chromo-electric dipole moment
- QCD theta term
- Chiral perturbation theory
- form factor: dipole
- electric moment: dipole
- nucleon: form factor
- perturbation theory: chiral
References(43)
Figures(1)