CP Violation Without Strangeness

Khriplovich, I. B.; Lamoreaux, S. K.

doi:10.1007/978-3-642-60838-4

Cited by 424 publications

(597 citation statements)

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“…In order to extract these constraints, however, we have to embark on a non-perturbative calculation of the electric dipole moment of the neutron in particular (or nucleon-nucleon interaction, as in the case of the EDM of 199 Hg) induced by the effective Lagrangian (2). The connection between different EDM observables and the coefficientsθ, d i ,d i is especially important in the framework of supersymmetric theories where eq.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…The relative importance of the Q 2 variation of F (1) D (Q 2 ) depends in addition on the ratio eg Aḡ0 /12π 2 f π d 1 . This ratio is a constant in the chiral limit.…”

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confidence: 99%

“…This ratio is a constant in the chiral limit. Since we expect it to be O(1), it is likely that m π sets the scale of the variation of F (1) D (Q 2 ) as well. Unlike other nucleon form factors, a dipole approximation with a mass scale close to the rho-meson mass, m ρ , should not be good even as a numerical approximation for the EDFF.…”

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confidence: 99%

The electric dipole form factor of the nucleon

2005

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The electric dipole form factor of the nucleon stemming from the QCDθ term is calculated in chiral perturbation theory in leading order. To this order, the form factor originates from the pion cloud. Its momentum dependence 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 factoris the pion mass.

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“…Because of their long spin coherence time, atomic bubbles are extremely sensitive to external perturbations. The far-reaching goal of these investigations is the design of a novel technique to search for parity and timereversal violating atomic electric dipole moments [21,22] discussed in the next section.…”

Section: Alkali Atoms In Quantum Crystalsmentioning

confidence: 99%

“…The experimental search for a non-vanishing edm is thus a search for P-and T-violating effects in elementary particles or composite systems, such as atoms or molecules [21]. For symmetry reasons a possible edm has to be parallel or antiparallel to the total angular momentum of the system under investigation, so that a change of its orientation by an external electric field will affect the spin coherence and thereby the sample magnetization.…”

Section: Search For Permanent Electric Dipole Momentsmentioning

confidence: 99%

Laser-based precision magnetometry in fundamental and applied research

Weis

Wynands

2005

Optics and Lasers in Engineering

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In this paper we review research done by the recently founded Fribourg group for Atomic Physics (FRAP) using laser-assisted spin coherence spectroscopy of atomic samples in applied and fundamental physics. Spin coherence in optically pumped ensembles of paramagnetic atoms may be extremely long-lived when the samples are well shielded from external perturbations, like static or oscillating magnetic fields and field gradients, static electric fields, or crystalline field gradients. Conversely, such interactions may be studied with high sensitivity and precision when the decoherence that they produce is measured by optical means. We report on applications of this technique covering optical magnetometry for biomagnetic diagnostics, investigations of atomic impurities in quantum crystals, measurements of forbidden tensor polarizabilities and electric dipole moments, and the space-time resolved study of the diffusion of gas-phase atoms.

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CP Violation Without Strangeness

Cited by 424 publications

References 0 publications

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

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

The electric dipole form factor of the nucleon

Laser-based precision magnetometry in fundamental and applied research

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