Nuclear ab initio calculations of 6He β-decay for beyond the Standard Model studies

Glick-Magid, Ayala; Forssén, Christian; Gazda, Daniel; Gazit, Doron; Gysbers, Peter; Navrátil, Petr

doi:10.1016/j.physletb.2022.137259

Cited by 17 publications

(10 citation statements)

References 55 publications

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“…The multipole operators involved are ĈV J , M A J ∝ J qr , and the terms of Jackson, Treiman and Wyld are: (see Ref. [32]). We thus use it here as a case study to demonstrate the application of the theory presented here.…”

Section: Non-unique Forbidden Transitionsmentioning

confidence: 99%

“…Fig. 1 compares the ratio R (BSM/SM) of BSM signatures in the aforementioned β-decay observables, a and b, to the associated SM correction calculated for 6 He β-decay in [32].…”

Section: We Focus On Tensor Couplings Of the Order Of Cmentioning

confidence: 99%

“…1. (Color online)The ratio R (BSM/SM) of BSM signatures in β-decay observables to the associated SM correction calculated for 6 He β-decay in[32], for different values of the BSM coupling constant. For visualization simplicity, we assume C A = CA and C T = CT .…”

mentioning

confidence: 99%

“…Dashed blue line is the ratio for the measured value of the angular correlation, a measured . In the white domain, considering the theoretical uncertainty from[32], separating the BSM signal from the SM corrections in both b and a measured is possible. In the other domains separation is limited by theoretical uncertainties.…”

mentioning

confidence: 99%

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Multipole decomposition of tensor interactions of fermionic probes with composite particles and BSM signatures in nuclear reactions

Glick-Magid¹,

Gazit²

2022

Preprint

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A multipole decomposition of a cross-section is a useful tool to simplify the analysis of reactions due to their symmetry properties. By using a new approach to decompose antisymmetric tensortype interactions within the multipole analysis, we introduce a general mathematical formalism for working with tensor couplings. This allows us to present a general tensor nuclear response, which is particularly useful for ongoing β-decay experiments looking for physics beyond the Standard Model, as well as other exotic particle scatterings off nuclei, e.g., in dark matter direct detection experiments. Using this method, beyond the Standard Model operators identify with the known Standard Model operators, eliminating the need for calculations of additional matrix elements. We present in detail BSM expressions useful for β-decay experiments and give an exemplary application for 6 He β-decay, although the formalism is easily generalizable for calculating other exotic scattering reactions.

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Section: Non-unique Forbidden Transitionsmentioning

confidence: 99%

“…Fig. 1 compares the ratio R (BSM/SM) of BSM signatures in the aforementioned β-decay observables, a and b, to the associated SM correction calculated for 6 He β-decay in [32].…”

Section: We Focus On Tensor Couplings Of the Order Of Cmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multipole decomposition of tensor interactions of fermionic probes with composite particles and BSM signatures in nuclear reactions

Glick-Magid¹,

Gazit²

2022

Preprint

Self Cite

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“…Experiments using trapped 6 He + ions [3] or atoms [4] have been performed to address the β-neutrino angular correlation and ancillary measurements have been carried out to study atomic effects following β decay [5,6]. New techniques have been proposed to determine the Fierz interference term from the β-energy spectrum [7][8][9] and selected observables of the transition have been the object of detailed theoretical studies to assess the sensitivity of future experiments to new physics [10,11].…”

Section: Introductionmentioning

confidence: 99%

High-precision measurement of the He6 half-life

Kanafani¹,

Fléchard²,

Naviliat‐Cuncic³

et al. 2022

Phys. Rev. C

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The half-life of 6 He has been measured using a low-energy radioactive beam implanted in an YAlO 3 Ce-doped inorganic scintillator and recording decay events in a 4π geometry. Events were time-stamped with a digital data acquisition system enabling a reliable control of dead-time effects and detector gain variations. The result, T 1/2 = (807.25 ± 0.16 stat ± 0.11 sys ) ms, provides the most precise value obtained so far and is consistent with the only previous measurement having a precision smaller than 0.1%. This resolves the long-standing discrepancy previously observed between two sets of measurements.

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Development of a 4π detection system for the measurement of the shape of β spectra

Singh

Mougeot

Leblond

et al. 2023

Nuclear Instruments and Methods in Physics Research Section A:

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Nuclear ab initio calculations of 6He β-decay for beyond the Standard Model studies

Cited by 17 publications

References 55 publications

Multipole decomposition of tensor interactions of fermionic probes with composite particles and BSM signatures in nuclear reactions

Multipole decomposition of tensor interactions of fermionic probes with composite particles and BSM signatures in nuclear reactions

High-precision measurement of the He6 half-life

Development of a 4π detection system for the measurement of the shape of β spectra

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