<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow><mml:mi>TaO</mml:mi></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:math>as a candidate molecular ion for searches of physics beyond the standard model

Fleig, Timo

doi:10.1103/physreva.95.022504

Cited by 26 publications

(20 citation statements)

References 42 publications

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“…The MQM molecular energy shifts for HfF + , TaN, TaO + and ThO were calculated in Refs. [40], [52], [54] and [45] respectively. They used the MQM calculated in the spherical basis method outlined in [24] and represent the shifts in fundamental T -,P -odd parameters as in Table II It is interesting to find the minimal SM prediction for the energy shifts which comes solely from the CKM matrix.…”

Section: Mqm Energy Shift In Diatomic Moleculesmentioning

confidence: 99%

Time reversal violating magnetic quadrupole moment in heavy deformed nuclei

Lackenby

Flambaum

2018

Phys. Rev. D

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The existence of permanent electric dipole moments (EDMs) and magnetic quadrupole moments (MQMs) violate both time reversal invariance (T ) and parity (P ). Following the CP T theorem they also violate combined CP symmetry. Nuclear EDMs are completely screened in atoms and molecules while interaction between electrons and MQMs creates atomic and molecular EDMs which can be measured and used to test CP-violation theories. Nuclear MQMs are produced by the nucleon-nucleon T, P -odd interaction and by nucleon EDMs. In this work we study the effect of enhancement of the nuclear MQMs due to the nuclear quadrupole deformation. Using the Nilsson model we calculate the nuclear MQMs for deformed nuclei of experimental interest and the resultant MQM energy shift in diatomic molecules of experimental interest 173 YbF , 177,179 HfF + , 181 TaN, 181 TaO + , 229 ThO and 229 ThF + .The observed matter-antimatter asymmetry in the universe is an important open question in modern physics. Three necessary conditions were postulated by Sakarhov[1] including the requirement that combined charge and parity (CP ) symmetry is violated. While the current standard model (SM) includes a CP -violating mechanism through a CP -violating phase in the CKM matrix [2] this alone is insufficient to account for the observed matter anti-matter asymmetry by several orders of magnitude (see e.g. Refs. [1,[3][4][5][6][7]). Therefore, other sources and mechanisms of CP -violation beyond the current SM must exist and investigating these will give insight into new physics.The violation of CP symmetry was first detected in the decay modes of the kaon system [8] and more recently in the B meson sector [9, 10] however detection of CP -violation in other systems has not been confirmed. By the CPT theorem a mechanism which violates combined CP symmetry must also violate time-reversal (T ) symmetry. Therefore, the existence of permanent electromagnetic moments which violate T symmetry is a promising avenue for constraining theories which incorporate a higher degree of CP -violation than the SM such as supersymmetric theories which has already been tightly constrained by current experimental limits for electric dipole moments (EDMs) [5,11,12].CP -violating permanent electrodynamic moments are expected to be observed in composite particles and systems such as atoms, nuclei and baryons and interpreted as parameters of CP -violating interactions in the lepton and quark-gluon sectors. In this paper we focus on the magnetic quadrupole moment (MQM) of the nucleus in particular, which is the lowest order magnetic moment that is forbidden in quantum systems by the time reversal invariance (T ) and parity (P ). For an in-depth review on symmetry violating electromagnetic moments including the MQM see Ref. [5,[13][14][15][16][17]. The MQM of composite systems such as the deuteron [18] have previously been investigated. The search for MQM in comparison with the electrostatic T, P -violating moments (EDM, Schiff and octupole moments) may have the following advantages:• The n...

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Section: Mqm Energy Shift In Diatomic Moleculesmentioning

confidence: 99%

Time reversal violating magnetic quadrupole moment in heavy deformed nuclei

Lackenby

Flambaum

2018

Phys. Rev. D

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“…The validity of this analytical relationship has been confirmed numerically in numerous electronic-structure studies of EDM enhancements and Ne-SPS interactions on other systems, for instance in Refs. [17,18,[60][61][62][63][64][65].…”

Section: Use Ofmentioning

confidence: 99%

P , T -Violating and Magnetic Hyperfine Interactions in Atomic Thallium

Fleig

Skripnikov

2020

Symmetry

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We present state-of-the-art string-based relativistic general-excitation-rank configuration interaction and coupled cluster calculations of the electron electric dipole moment, the nucleon–electron scalar-pseudoscalar, and the magnetic hyperfine interaction constants ( α d e , α C S , A | | , respectively) for the thallium atomic ground state 2 P 1 / 2 . Our present best values are α d e = − 558 ± 28 , α C S = 6.77 ± 0.34 [ 10 − 18 e cm], and A | | = 21172 ± 1059 [MHz]. The central value of the latter constant agrees with the experimental result to within 0.7% and serves as a measurable probe of the P , T -violating interaction constants. Our findings lead to a significant reduction of the theoretical uncertainties for P , T -odd interaction constants for atomic thallium but not to stronger constraints on the electron electric dipole moment, d e , or the nucleon–electron scalar-pseudoscalar coupling constant, C S .

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“…The same applies to the heavy-atom magnetic hyperfine constant A || ( 177 Hf) with reference to earlier studies of hyperfine interaction on valence isoelectronic systems [18,26]. The uncertainties for G || and the molecule-frame EDM D are estimated to be 10% and 15%, respectively, in accord with the discussion in reference [30]. I: Molecule-frame static electric dipole moment, electron EDM and ne-S-PS interaction constants, parallel component of electronic G tensor, excited-state lifetime, and magnetic hyperfine interaction constants for the Ω = 1 ( 3 ∆1) science state of HfF + .…”

Section: Resultsmentioning

confidence: 61%

P,T -odd and magnetic hyperfine-interaction constants and excited-state lifetime for HfF+

Fleig

2017

Phys. Rev. A

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Parity-and time-reversal-symmetry violating interaction constants required for the interpretation of a recent measurement (arXiv:1704.07928 [physics.atom-ph]) of corresponding symmetry violations in the Ω = 1 ( 3 ∆1) science state of the HfF + molecular ion are reported. Using a relativistic fourcomponent all-electron multi-reference configuration interaction model the nucleon-electron scalarpseudoscalar interaction constant is determined as WS = 20.0 [kHz]. An updated result for the electron electric-dipole-moment effective electric field of |E eff | = 22.7 GV cm is obtained. Further results of relevance in the context of the search for leptonic charge-parity violation such as magnetic hyperfine interaction constants and electronic G-tensor for HfF + are presented.

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TaO+as a candidate molecular ion for searches of physics beyond the standard model

Cited by 26 publications

References 42 publications

Time reversal violating magnetic quadrupole moment in heavy deformed nuclei

Time reversal violating magnetic quadrupole moment in heavy deformed nuclei

P , T -Violating and Magnetic Hyperfine Interactions in Atomic Thallium

P,T -odd and magnetic hyperfine-interaction constants and excited-state lifetime for HfF+

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