Electron shakeoff following the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>β</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math>decay of trapped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>35</mml:mn></mml:msup></mml:math>Ar<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mo>+</mml:mo></mml:msup></mml:math>ions

Couratin, C.; Fabian, X.; Fabre, B.; Pons, B.; Fléchard, X.; Liénard, E.; Ban, G.; Breitenfeldt, M.; Delahaye, P.; Durand, Dominique; Méry, A.; Naviliat‐Cuncic, O.; Porobic, T.; Qúeḿener, G.; Rodriguez, D. Rodriguez; Severijns, N.; Thomas, J. C.; Gorp, S. Van

doi:10.1103/physreva.88.041403

Cited by 20 publications

(25 citation statements)

References 29 publications

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“…A very interesting byproduct of these measurements with LPCTrap is related to the charge state distributions extracted for the recoiling 6 Li, 19 F and 35 Cl daughter nuclei [181,182,325,326]. For 6 Li the experimental shake-off probability was found to be in perfect agreement with simple quantum mechanical calculations [325].…”

Section: β − ν Correlationmentioning

confidence: 82%

New physics searches in nuclear and neutron β decay

González–Alonso

Naviliat‐Cuncic

Severijns

2019

Progress in Particle and Nuclear Physics

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235

282

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The status of tests of the standard electroweak model and of searches for new physics in allowed nuclear β decay and neutron decay is reviewed including both theoretical and experimental developments. The sensitivity and complementarity of recent and ongoing experiments are discussed with emphasis on their potential to look for new physics. Measurements are interpreted using a model-independent effective field theory approach enabling to recast the outcome of the analysis in many specific new physics models. Special attention is given to the connection that this approach establishes with high-energy physics. A new global fit of available β-decay data is performed incorporating, for the first time in a consistent way, superallowed 0 + → 0 + transitions, neutron decay and nuclear decays. The constraints on exotic scalar and tensor couplings involving left-or right-handed neutrinos are determined while a constraint on the pseudoscalar coupling from neutron decay data is obtained for the first time as well. The values of the vector and axial-vector couplings, which are associated within the standard model to V ud and g A respectively, are also updated. The ratio between the axial and vector couplings obtained from the fit under standard model assumptions is C A /C V = −1.27510(66). The relevance of the various experimental inputs and error sources is critically discussed and the impact of ongoing measurements is studied. The complementarity of the obtained bounds with other low-and high-energy probes is presented including ongoing searches at the Large Hadron Collider.

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Section: β − ν Correlationmentioning

confidence: 82%

New physics searches in nuclear and neutron β decay

González–Alonso

Naviliat‐Cuncic

Severijns

2019

Progress in Particle and Nuclear Physics

Self Cite

235

282

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“…The description of shake-off has seen significant theoretical (Carlson et al, 1968;Freedman, 1974;Frolov and Ruiz, 2010;Green, 1957;Law and Suzuki, 1982;Levinger, 1953;Ruiz, 2013;Ruiz et al, 2013;Schwartz, 1953;Stephas andCrasemann, 1967, 1971;Suzuki and Jaw, 1982) and experimental (Carlson, 1963a,b;Carlson et al, 1963;Couratin et al, 2013Couratin et al, , 2012Schupp and Freedman, 1980;Scielzo et al, 2003;Snell and Pleasonton, 1957) effort. For practical reasons, this has mainly focused on the calculation of electron ejection from the K shell, which is a small effect in all nuclei 1 and not in our current interests.…”

Section: Shake-offmentioning

confidence: 99%

“…Neglecting shake-up and collisional ionization (Carlson, 1963a;Freedman, 1974), this can be described by the one-electron ionization probability (Couratin et al, 2013)…”

Section: Shake-offmentioning

confidence: 99%

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High precision analytical description of the allowed β spectrum shape

et al. 2018

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A fully analytical description of the allowed β spectrum shape is given in view of ongoing and planned measurements. Its study forms an invaluable tool in the search for physics beyond the standard electroweak model and the weak magnetism recoil term. Contributions stemming from finite size corrections, mass effects, and radiative corrections are reviewed. A particular focus is placed on atomic and chemical effects, where the existing description is extended and analytically provided. The effects of QCD-induced recoil terms are discussed, and cross-checks were performed for different theoretical formalisms. Special attention was given to a comparison of the treatment of nuclear structure effects in different formalisms. Corrections were derived for both Fermi and Gamow-Teller transitions, and methods of analytical evaluation thoroughly discussed. In its integrated form, calculated f values were in agreement with the most precise numerical results within the aimed for precision. We stress the need for an accurate evaluation of weak magnetism contributions, and note the possible significance of the oft-neglected induced pseudoscalar interaction. Together with improved atomic corrections, we then present an analytical description of the allowed β spectrum shape accurate to a few parts in 10 −4 down to 1 keV for low to medium Z nuclei, thereby extending the work by previous authors by nearly an order of magnitude.

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“…In the T=1/2 mirror transitions [8], the mixing ratio is always the least known parameter [9]. In the case of 35 Ar and 19 Ne, all parameters involved in the determination of V ud , except , are presently known with relative precisions below the 10 -4 level. Accurate correlation measurements in their decays would then enable to significantly improve the current value of V ud deduced from the mirror transitions database [7]: (17), which is a factor of 10 less precise than the result deduced from the pure F transitions [10].…”

Section: Introductionmentioning

confidence: 99%

Precision measurements with LPCTrap at GANIL

et al. 2015

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Abstract. The experimental achievements and the results obtained so far with the LPCTrap device installed at GANIL are presented. The apparatus is dedicated to the study of the weak interaction at low energy by means of precise measurements of the - angular correlation parameter in nuclear  decays. So far, the data collected with three isotopes have enabled to determine, for the first time, the charge state distributions of the recoiling ions, induced by shakeoff process. The analysis is presently refined to deduce the correlation parameters, with the potential of improving both the constraint deduced at low energy on exotic tensor currents (

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Electron shakeoff following theβ+decay of trapped35Ar+ions

Cited by 20 publications

References 29 publications

New physics searches in nuclear and neutron β decay

New physics searches in nuclear and neutron β decay

High precision analytical description of the allowed β spectrum shape

Precision measurements with LPCTrap at GANIL

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