MDPI - Publisher of Open Access Journals

16 pages, 588 KiB

Open AccessArticle

Implications of W-Boson Mass Anomaly for Atomic Parity Violation

by Hoang Bao Tran Tan and Andrei Derevianko

Atoms 2022, 10(4), 149; https://doi.org/10.3390/atoms10040149 - 9 Dec 2022

Cited by 14 | Viewed by 2437

We consider the implications of the recent measurement of the W-boson mass

M_{W} = 80,433.5 \pm 9.4 MeV / c^{2}

for atomic parity violation experiments. We show that the change in

M_{W}

shifts the Standard Model prediction for the

^{133}

[...] Read more.

We consider the implications of the recent measurement of the W-boson mass

M_{W} = 80,433.5 \pm 9.4 MeV / c^{2}

for atomic parity violation experiments. We show that the change in

M_{W}

shifts the Standard Model prediction for the

^{133}

Cs nuclear weak charge to

Q_{W} (^{133} Cs) = - 73.11 (1)

, i.e., by

8.5 σ

from its current value, and the proton weak charge by 2.7%. The shift in

Q_{W} (^{133} Cs)

ameliorates the tension between existing determinations of its value and motivates more accurate atomic theory calculations, while the shift in

Q_{W} (p)

inspires next-generation atomic parity violation experiments with hydrogen. Using our revised value for

Q_{W} (^{133} Cs)

, we also readjust constraints on parameters of physics beyond the Standard Model. Finally, we reexamine the running of the electroweak coupling for the new W boson mass. Full article

(This article belongs to the Special Issue The Fundamental Role of Precision Atomic-Physics Measurements in Modern Science)

► Show Figures

Figure 1

12 pages, 517 KiB

Open AccessCommunication

Precision Measurement Noise Asymmetry and Its Annual Modulation as a Dark Matter Signature

by Benjamin M. Roberts and Andrei Derevianko

Universe 2021, 7(3), 50; https://doi.org/10.3390/universe7030050 - 28 Feb 2021

Cited by 5 | Viewed by 2219

Abstract

Dark matter may be composed of self-interacting ultralight quantum fields that form macroscopic objects. An example of which includes Q-balls, compact non-topological solitons predicted by a range of theories that are viable dark matter candidates. As the Earth moves through the galaxy, interactions with such objects may leave transient perturbations in terrestrial experiments. Here we propose a new dark matter signature: an asymmetry (and other non-Gaussianities) that may thereby be induced in the noise distributions of precision quantum sensors, such as atomic clocks, magnetometers, and interferometers. Further, we demonstrate that there would be a sizeable annual modulation in these signatures due to the annual variation of the Earth velocity with respect to dark matter halo. As an illustration of our formalism, we apply our method to 6 years of data from the atomic clocks on board GPS satellites and place constraints on couplings for macroscopic dark matter objects with radii

R < 10^{4} km

, the region that is otherwise inaccessible using relatively sparse global networks. Full article

(This article belongs to the Special Issue Advances in Understanding Astrophysical and Atomic Phenomena)

► Show Figures

Figure 1

Search Results (2)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI

Saved Queries

Search Filter Reset All

Years

Feature Papers

Subjects

Journals

Article Types

Countries / Regions

Search Results (2)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI