Determination of the fine-structure constant with a 81 parts-per-trillon accuracy - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2021

Determination of the fine-structure constant with a 81 parts-per-trillon accuracy

Résumé

The fine-structure constant α is a crucial parameter of the quantum electrodynamics theory especially for evaluating the magnetic moment of electron or muon predicted by the standard model. By using a matter-wave interferometer to measure the recoil velocity, we obtained recently a new value of the fine-structure constant with an accuracy of 81 parts per trillion. Using this value of the fine-structure constant, we obtained a prediction of the anomalous magnetic moment of the electron with a relative uncertainty below 0.1 ppt. This is the most accurate prediction of the standard model. This result is an important step in the way of testing, in the electron sector, the discrepancy observed in the magnetic moment anomaly of the muon.
Fichier principal
Vignette du fichier
clade.pdf (587.77 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03443551 , version 1 (27-11-2021)

Identifiants

  • HAL Id : hal-03443551 , version 1

Citer

Pierre Cladé, Léo Morel, Zhibin Yao, Saïda Guellati-Khélifa. Determination of the fine-structure constant with a 81 parts-per-trillon accuracy. 55th Rencontre Moriond - Electroweak interactions and Unified Theories, Mar 2021, Moriond (online), France. ⟨hal-03443551⟩
91 Consultations
75 Téléchargements

Partager

Gmail Facebook X LinkedIn More