Implications of W-boson mass anomaly for atomic parity violation

2022/04/25 by H. B. Tran Tan, Tan, H. B. Tran, A. Derevianko +1
Physics and Astronomy · #Particle physics theoretical and experimental studies #Nuclear physics research studies #Radioactive Decay and Measurement Techniques

paper · pdf · doi:10.48550/arxiv.2204.11991

Abstract

We consider the implication of the recent measurement of the W-boson mass M_W [Science 376, 170 (2022)] for atomic parity violation experiments. We show that the change in M_W shifts the Standard Model prediction for the ¹³³Cs nuclear weak charge to Q_W(¹³³\rm Cs)=-72.85(6), i.e. by 5.5σ from its current value. This brings existing experimental result for Q_W(¹³³\rm Cs) into an essential agreement with the Standard Model. Using our revised value for Q_W(¹³³\rm Cs), we readjust constraints on physics beyond the Standard Model.

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