Strange quarks in the nucleon and neutron electric dipole moment

Khatsymovsky, V. M.; Khriplovich, I.B.; Zhitnitsky, Ariel R.

doi:10.1007/bf01573940

Cited by 64 publications

(68 citation statements)

References 10 publications

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“…(10) and (11). At this point our results are already slightly different from [7,8,29]. Namely, we have included additional contributions related to the fact that the octet combination of color EDM operators has the quantum numbers of the π 0 and η fields which can therefore be produced from the vacuum.…”

Section: Cp-violating Nucleon-nucleon Interaction In Mssmmentioning

confidence: 86%

MSSM predictions for the electric dipole moment of the 199Hg atom

et al. 1999

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The Minimal Supersymmetric Standard Model can possess several CP-violating phases beyond the conventional Cabibo-Kobayashi-Maskawa phase. We calculate the contribution of these phases to T-violating nuclear forces. These forces induce a Schiff moment in the 199 Hg nucleus, which is strongly limited by experiments aimed at the detection of the electric dipole moment of the mercury atom. The result for d Hg is found to be very sensitive to the CP-violating phases of the MSSM and the calculation carries far fewer QCD uncertainties than the corresponding calculation of the neutron EDM. In certain regions of the MSSM parameter space, the limit from the mercury EDM is stronger than previous constraints based on either the neutron or electron EDMs. We present combined constraints from the mercury and electron EDMs to limit both CP-violating phases of the MSSM. We also present limits in mSUGRA models with unified gaugino and scalar masses at the GUT scale.

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Section: Cp-violating Nucleon-nucleon Interaction In Mssmmentioning

confidence: 86%

MSSM predictions for the electric dipole moment of the 199Hg atom

et al. 1999

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“…In particular, direct QCD sum rules calculations [13,14] give d n ∼ 20 times smaller than the estimates based on the chiral loop approach [15,16]. Thus, we believe that an independent calculation of d CEDM…”

Section: Introductionmentioning

confidence: 84%

Hadron electric dipole moments from CP-odd operators of dimension five via QCD sum rules: the vector meson

Pospelov

Ritz

2000

Physics Letters B

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We present a complete analysis of the electric dipole moment (EDM) of the ρ-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, 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. * pospelov@mnhepw.hep.umn.edu † a.ritz@damtp.cam.ac.uk ‡ Present address 1

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“…From these results we could see that the effect of takingm tR <m is sizable. In particular, on the bounds of the mass insertions (δ From the results in tables (10) and (11), it is remarkable to notice that, in the limit of very heavy squark masses but with fixed right stop and chargino masses, the bounds on the mass insertions (δ u RL ) 31 (δ u RL ) 3i tend to constant values. This is indeed an interesting property which shows a particular non-decoupling effect of supersymmetry when two light right-stop run inside the diagrams in Fig.…”

Section: ∆B=2 Effmentioning

confidence: 95%

Cp Violation in Supersymmetric Theories

Khalil

2003

Int. J. Mod. Phys. A

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We review the present status of CP violating problem in supersymmetric extensions of the standard model. We analyze the constraints imposed by the experimental limits of the electron, neutron, and mercury electric dipole moments on the supersymmetric CP phases and show that only the scenarios with flavour-off-diagonal CP violation remain attractive. These scenarios require hermitian Yukawa matrices which naturally arise in models with left-right symmetry or a SU (3) flavour symmetry. In this case, ε K and ε ′ /ε can be saturated by a small non-universality of the soft scalar masses through the gluino and chargino contributions respectively. The model also predicts a strong correlation between A CP (b → sγ) and the neutron electric dipole moment. In this framework, the standard model gives a the leading contribution to the CP asymmetry in B → ψK S decay, while the dominant chargino contribution to this asymmetry is < 0.2. Thus, no constraint is set on the non-universality of this model by the recent BaBar and Belle measurements.

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Strange quarks in the nucleon and neutron electric dipole moment

Cited by 64 publications

References 10 publications

MSSM predictions for the electric dipole moment of the 199Hg atom

MSSM predictions for the electric dipole moment of the 199Hg atom

Hadron electric dipole moments from CP-odd operators of dimension five via QCD sum rules: the vector meson

Cp Violation in Supersymmetric Theories

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