<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math>violation in beta decay and electric dipole moments

Ng, John N.; Tulin, Sean

doi:10.1103/physrevd.85.033001

Cited by 42 publications

(70 citation statements)

References 120 publications

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“…In terms of dimensionless quantities, the numerical factors in Eqs. (26) and (29) are not very different, as one would expect from Eqs. (22) and (23).…”

Section: Sizes Of T Couplingsmentioning

confidence: 51%

“…It leads below M EW to additional¨C P four-quark operators [29], which couple left-and right-handed quarks and we call LR4QOs. It also causes¨C P in nuclear β decay when W ± connect to the left-handed lepton current [29].…”

Section: Bsm Physics Can Be Described Below Its Characteristic Scalementioning

confidence: 99%

“…[25]. Among those responsible for¨C P [26], hadronic and nuclear EDMs are most sensitive to quark EDMs (qEDMs) and chromo-EDMs (qCEDMs), the gluon chromo-EDM (gCEDM) [27], and certain four-quark interactions [28,29]. Nowadays the techniques exist -renormalization-group (RG) running down to the QCD scale M QCD ∼ 1 GeV, lattice QCD (LQCD) for the calculation of low-energy constants (LECs), nuclear EFTs to describe the dynamics at momenta Q < M QCD in terms of the LECs-to connect these operators at the EW scale to light-nuclear EDMs.…”

Section: Multipolarity Electricmentioning

confidence: 99%

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Effective Field Theory and Time-Reversal Violation in Light Nuclei

Mereghetti

Kolck²

2015

Annu. Rev. Nucl. Part. Sci.

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Thanks to the unnaturally small value of the QCD vacuum angleθ < ∼ 10 −10 , timereversal violation ( T ) offers a window into physics beyond the Standard Model (SM) of particle physics. We review the effective-field-theory framework that establishes a clean connection between T mechanisms, which can be represented by higher-dimensional operators involving SM fields and symmetries, and hadronic interactions, which allow for controlled calculations of low-energy observables involving strong interactions. The chiral properties of T mechanisms leads to a pattern that should be identifiable in measurements of the electric dipole moments of the nucleon and light nuclei.

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“…In terms of dimensionless quantities, the numerical factors in Eqs. (26) and (29) are not very different, as one would expect from Eqs. (22) and (23).…”

Section: Sizes Of T Couplingsmentioning

confidence: 51%

Section: Bsm Physics Can Be Described Below Its Characteristic Scalementioning

confidence: 99%

Section: Multipolarity Electricmentioning

confidence: 99%

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Effective Field Theory and Time-Reversal Violation in Light Nuclei

Mereghetti

Kolck²

2015

Annu. Rev. Nucl. Part. Sci.

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“…(8), it is possible to show that the same SU(2) L × U(1) Y invariant effective operators that generate at low-energy the coefficients R,S,T also generate contributions to different EDMs [62], which generates much stronger bounds than those given in Eqs. (28)- (30).…”

Section: Cp-violating Interactionsmentioning

confidence: 99%

“…(28)- (30). In fact, the indirect limit on the D coefficient from the current neutron EDM bound is of the order 10 −7 [62], whereas for the R coefficient the current Thallium EDM bound implies an indirect bound at the level of 10 −8 [63]. These bounds from EDMs could be avoided assuming an almost complete cancellation with other effective operators contributing to the EDMs.…”

Section: Cp-violating Interactionsmentioning

confidence: 99%

Prospects for precision measurements in nuclear decay in the LHC era

2013

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Precision measurements in nuclear β decay offer a sensitive window to search for new physics beyond the standard electroweak model. Searches for new physics are also a strong motivation for experiments carried out at the high energy frontier. It is instructive to confront results from the low energy and the high energy frontiers in order to look for possible complementarities. This paper reviews the constraints on new physics obtained from nuclear and neutron decays and compares them to those from other semi-leptonic processes and from the LHC. The sensitivity requirements of new precision experiments in β decay, to impact the search for new physics at the light of current and projected LHC results, are updated. Experimental developments in nuclear and neutron β decay are discussed with emphasis on their projected goals to improve the limits on exotic weak couplings.

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T-odd momentum correlation in radiative β decay

Gardner¹,

He²

2013

SSP 2012

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We consider neutron radiative β decay, n → pe −ν e γ, and compute the T-odd momentum correlation in the decay rate characterized by the kinematical variable ξ = l ν · (l e × k) arising from electromagnetic final-state interactions in the Standard Model. Our expression for the corresponding T-odd asymmetry A SM ξ is exact in O(α) up to terms of recoil order, and we evaluate it numerically under various kinematic conditions. Noting the universality of the V-A law in the absence of recoilorder terms, we retain the parametric dependence on masses and coupling constants throughout, so that our results serve as a template for the computation of A SM ξ in allowed nuclear radiative β decays and hyperon radiative β decays as well.

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CPviolation in beta decay and electric dipole moments

Cited by 42 publications

References 120 publications

Effective Field Theory and Time-Reversal Violation in Light Nuclei

Effective Field Theory and Time-Reversal Violation in Light Nuclei

Prospects for precision measurements in nuclear decay in the LHC era

T-odd momentum correlation in radiative β decay

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