TY - JOUR

T1 - Hadron electric dipole moments from CP-odd operators of dimension five via QCD sum rules

T2 - The vector meson

AU - Pospelov, Maxim

AU - Ritz, Adam

PY - 2000/1/6

Y1 - 2000/1/6

N2 - We present a complete analysis of the electric dipole moment (EDM) of the p-meson induced by CP violating operators of dimension 4 and 5 within the QCD sum rules approach. The set of CP-odd operators includes the theta term and the electric and chromoelectric dipole moments of the three light quarks. We find that the ρ-meson EDM induced purely by the EDMs of quarks is smaller than, but still in reasonable agreement with, the predictions of a naive constituent quark model. However, the chromoelectric dipole moments, including that of the strange quark, give comparable and sometimes larger contributions. We also consider the effect on the hadronic EDM of the existence of Peccei-Quinn symmetry. When this symmetry is active, chromoelectric dipole moments induce a linear term in the axion potential which leads to a numerically important vacuum contribution to the hadronic EDM. (C) 2000 Published by Elsevier Science B.V.

AB - We present a complete analysis of the electric dipole moment (EDM) of the p-meson induced by CP violating operators of dimension 4 and 5 within the QCD sum rules approach. The set of CP-odd operators includes the theta term and the electric and chromoelectric dipole moments of the three light quarks. We find that the ρ-meson EDM induced purely by the EDMs of quarks is smaller than, but still in reasonable agreement with, the predictions of a naive constituent quark model. However, the chromoelectric dipole moments, including that of the strange quark, give comparable and sometimes larger contributions. We also consider the effect on the hadronic EDM of the existence of Peccei-Quinn symmetry. When this symmetry is active, chromoelectric dipole moments induce a linear term in the axion potential which leads to a numerically important vacuum contribution to the hadronic EDM. (C) 2000 Published by Elsevier Science B.V.

UR - http://www.scopus.com/inward/record.url?scp=0034610716&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034610716&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(99)01343-X

DO - 10.1016/S0370-2693(99)01343-X

M3 - Article

AN - SCOPUS:0034610716

VL - 471

SP - 388

EP - 395

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 4

ER -