Two-Loop Electron Self-Energy for Low Nuclear Charges

IF 8.1 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical review letters Pub Date : 2024-12-19 DOI:10.1103/physrevlett.133.251803

V. A. Yerokhin, Z. Harman, C. H. Keitel

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引用次数: 0

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 ], 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.

Published by the American Physical Society

2024

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks