Academic Journal
Anomalies in $^8$Be nuclear transitions and $(g-2)_{e,\mu}$: towards a minimal combined explanation
| العنوان: | Anomalies in $^8$Be nuclear transitions and $(g-2)_{e,\mu}$: towards a minimal combined explanation |
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| المؤلفون: | Hati, C., Kriewald, J., Orloff, J., Teixeira, A.M. |
| المساهمون: | Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne 2017-2020 (UCA 2017-2020 )-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 1126-6708. |
| بيانات النشر: | HAL CCSD Springer |
| سنة النشر: | 2020 |
| المجموعة: | HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
| مصطلحات موضوعية: | Beyond Standard Model, Neutrino Physics, symmetry: U(1), B-L number, Z', fermion: vector particle, nucleus: transition, lepton: magnetic moment, dipole: magnetic, electron: pair production, beryllium, lepton: mass, lepton: mixing, numerical calculations, new physics, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] |
| الوصف: | International audience ; Motivated by a simultaneous explanation of the apparent discrepancies in the light charged lepton anomalous magnetic dipole moments, and the anomalous internal pair creation in $^{8}$Be nuclear transitions, we explore a simple New Physics model, based on an extension of the Standard Model gauge group by a U(1)$_{B−L}$. The model further includes heavy vector-like fermion fields, as well as an extra scalar responsible for the low-scale breaking of U(1)$_{B−L}$, which gives rise to a light Z′ boson. The new fields and currents allow to explain the anomalous internal pair creation in $^{8}$Be while being consistent with various experimental constraints. Interestingly, we find that the contributions of the Z′ and the new U(1)$_{B−L}$-breaking scalar can also successfully account for both (g −2)$_{e,μ}$ anomalies; the strong phenomenological constraints on the model’s parameter space ultimately render the combined explanation of (g − 2)$_{e}$ and the anomalous internal pair creation in $^{8}$Be particularly predictive. The underlying idea of this minimal “prototype model” can be readily incorporated into other protophobic U(1) extensions of the Standard Model. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/2005.00028; hal-02634694; https://hal.science/hal-02634694; ARXIV: 2005.00028; INSPIRE: 1793826 |
| DOI: | 10.1007/JHEP07(2020)235 |
| الاتاحة: | https://hal.science/hal-02634694 https://doi.org/10.1007/JHEP07(2020)235 |
| رقم الانضمام: | edsbas.F70176A8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/JHEP07(2020)235 |
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