Year: 2024
Type: article
Abstract: Calculations of the two-loop electron self-energy for the 1S Lamb shift are reported, performed to all orders in the nuclear binding strength parameter Zα (where Z is the nuclear charge number and α is the fine structure constant). Our approach allows calculations to be extended to nuclear charges lower than previously possible and improves the numerical accuracy by more than an order of magnitude. Extrapolation of our all-order results to hydrogen yields a result twice as precise as the previously accepted value [E. Tiesinga et al. Rev. Mod. Phys. 93, 025010 (2021)RMPHAT0034-686110.1103/RevModPhys.93.025010], differing from it by 2.8 standard deviations. The resulting shift in the theoretical prediction for the 1S-2S transition frequency in hydrogen decreases the value of the Rydberg constant by one standard deviation.
Source: Physical Review Letters
Authors: V. A. Yerokhin, Z. Harman, C. H. Keitel
Institution: Max Planck Institute for Nuclear Physics
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
OpenAlex ID: W4405569506