Erratum: Atomic electric-dipole moments from Higgs-boson-mediated interactions [Phys. Rev. A<b>78</b>, 010501 (2008)]

Sahoo, B. K.; Das, Biswaranjan; Chaudhuri, Rajat K.; Mukherjee, Debashis; Venugopal, Prasad

doi:10.1103/physreva.78.039901

Cited by 11 publications

(28 citation statements)

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“…The R coefficient, corresponding to the T-odd β-decay correlation J · σ e × p e where σ e is e ± polarization, has greater sensitivity to scalar-and tensor-type CP violation [5,6]. Moreover, these couplings are correlated with CP-odd tensor and scalar electron-nucleon couplings, which are strongly constrained by 199 Hg [23] and 205 Tl [24] EDM bounds, respectively [43,44,45,46,47].…”

Section: A Beta Decaymentioning

confidence: 99%

CPviolation in beta decay and electric dipole moments

Tulin

2012

Phys. Rev. D

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The T-odd correlation coefficient D in nuclear β-decay probes CP violation in many theories beyond the Standard Model. We provide an analysis for how large D can be in light of constraints from electric dipole moment (EDM) searches. We argue that the neutron EDM d n currently provides the strongest constraint on D, which is 10 − 10 3 times stronger than current direct limits on D (depending on the model). In particular, contributions to D in leptoquark models (previously regarded as "EDM safe") are more constrained than previously thought. Bounds on D can be weakened only by fine-tuned cancellations or if theoretical uncertainties are larger than estimated in d n . We also study implications for D from mercury and deuteron EDMs.

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Section: A Beta Decaymentioning

confidence: 99%

CPviolation in beta decay and electric dipole moments

Tulin

2012

Phys. Rev. D

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“…The matrix elements of H EDM cannot be measured directly. However, the accuracy of this quantity can be indirectly estimated from the square root of the product of the magnetic dipole hyperfine structure constants (A hyp ) of the appropriate states [8,9].…”

Section: Termmentioning

confidence: 99%

“…Atomic EDMs due to the electron EDM and the S-PS electron-nucleus interaction can shed light on CP violation in the leptonic and semileptonic sectors [1,5]. The origin of both of these kinds of CP violations is not well understood.The best limit on the EDM of a paramagnetic atom currently comes from thallium (Tl) [6][7][8][9]. A new generation of EDM experiments on the alkali-metal atoms like rubidium [10], caesium [10][11][12], and francium [13] and based on the techniques of laser cooling and trapping is currently underway.…”

mentioning

confidence: 99%

“…The best limit on the EDM of a paramagnetic atom currently comes from thallium (Tl) [6][7][8][9]. A new generation of EDM experiments on the alkali-metal atoms like rubidium [10], caesium [10][11][12], and francium [13] and based on the techniques of laser cooling and trapping is currently underway.…”

mentioning

confidence: 99%

“…represents the complex conjugate terms. The procedure for the calculation of the above expression is discussed elsewhere [8,9,17,18]. …”

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confidence: 99%

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Search for a permanent electric-dipole moment using atomic indium

2011

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We propose indium (In) as a possible candidate for observing the permanent electric dipole moment (EDM) arising from violations of parity (P ) and time-reversal (T ) symmetries. This atom has been laser cooled and therefore the measurement of its EDM has the potential of improving on the current best EDM limit for a paramagnetic atom, which comes from thallium. We report the results of our calculations of the EDM enhancement factor due to the electron EDM and the ratio of the atomic EDM to the electron-nucleus scalar-pseudoscalar (S-PS) interaction coupling constant in In within the framework of the relativistic coupled cluster theory. It might be possible to get new limits for the electron EDM and the S-PS CP -violating coupling constant by combining the results of our calculations with the measured value of the EDM of In when it is available. These limits could have important implications for the standard model (SM) of particle physics.It is now widely recognized that atomic electric dipole moments (EDMs) arising from violations of parity (P ) and time-reversal (T ) symmetries can provide important information about new physics beyond the standard model (SM) [1,2].The dominant sources of the EDM of a paramagnetic atom are the EDM of an electron and the scalar-pseudoscalar (S-PS) interaction between the electron and the nucleus which violates P as well as T symmetries [4]. Atomic EDMs due to the electron EDM and the S-PS electron-nucleus interaction can shed light on CP violation in the leptonic and semileptonic sectors [1,5]. The origin of both of these kinds of CP violations is not well understood.The best limit on the EDM of a paramagnetic atom currently comes from thallium (Tl) [6][7][8][9]. A new generation of EDM experiments on the alkali-metal atoms like rubidium [10], caesium [10][11][12], and francium [13] and based on the techniques of laser cooling and trapping is currently underway. These experiments have, in principle, the advantages of both the beam and the cell experiments [14]. In particular, it is possible to apply large electric fields and the coherence times are long in these experiments [14]. The projected precision of the current alkali-metal EDM experiments are about two orders of magnitude better than that of the Tl experiment [10][11][12]. Indium (In), which is homologous to Tl, appears to be an attractive candidate for the search of a permanent EDM for essentially two reasons: First, this atom has been laser cooled [15] and, second, the EDM enhancement factor due to the electron EDM and the ratio of the atomic EDM to the S-PS coupling constant can be calculated more accurately than that of Tl due to its relatively smaller size. To demonstrate this second point more elaborately, we carry out herein ab initio calculations for the corresponding factors due to the EDM of electron and the S-PS electron-nucleus interaction in In and discuss the role of different correlation effects in these properties.

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A robust limit for the electric dipole moment of the electron

Jung

2013

J. High Energ. Phys.

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Electric dipole moments constitute a competitive method to search for new physics, being particularly sensitive to new CP-violating phases. Given the experimental and theoretical progress in this field and more generally in particle physics, the necessity for more reliable bounds than the ones usually employed emerges. We therefore propose an improved extraction of the electric dipole moment of the electron and the relevant coefficient of the electron-nucleon coupling, taking into account theoretical uncertainties and possible cancellations, to be used in model-dependent analyses. Specifically, we obtain at 95% C.L. |d_e|<=0.14 10^{-26}e cm with present data, which is very similar to the bound typically quoted from the YbF molecule, but obtained in a more conservative manner. We examine furthermore in detail the prospects for improvements and derive upper limits for the dipole moments of several paramagnetic systems presently under investigation, i.e. Cesium, Rubidium and Francium.Comment: 8 pages, 2 tables, 4 figures. v2: Extended discussion of the EDM of Tl, corrected value for the nuclear magnetic moment of Hg (implying small shifts in the obtained numerical values) and further minor change

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Erratum: Atomic electric-dipole moments from Higgs-boson-mediated interactions [Phys. Rev. A78, 010501 (2008)]

Cited by 11 publications

References 0 publications

CPviolation in beta decay and electric dipole moments

CPviolation in beta decay and electric dipole moments

Search for a permanent electric-dipole moment using atomic indium

A robust limit for the electric dipole moment of the electron

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