Neutron EDM from Electric and Chromoelectric Dipole Moments of Quarks

Details Neutron EDM from Electric and Chromoelectric Dipole Moments of Quarks Neutron EDM from Electric and Chromoelectric Dipole Moments of Quarks

2000-10-05

arxiv.org/abs/hep-ph/0010037v2

Phys.Rev. D63 (2001) 073015

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, revtex, v2: missing overall factor of two reinstated

Scientific paper

10.1103/PhysRevD.63.073015

Using QCD sum rules, we calculate the electric dipole moment of the neutron d_n induced by all CP violating operators up to dimension five. We find that the chromoelectric dipole moments of quarks \tilde d_i, including that of the strange quark, provide significant contributions comparable in magnitude to those induced by the quark electric dipole moments d_i. When the theta term is removed via the Peccei-Quinn symmetry, the strange quark contribution is also suppressed and d_n =(1\pm 0.5)[1.1e(\tilde d_d + 0.5\tilde d_u)+1.4(d_d-0.25d_u)].

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