• Featured in Physics
  • Editors' Suggestion

Evidence for Nonlinear Isotope Shift in Yb+ Search for New Boson

Ian Counts, Joonseok Hur, Diana P. L. Aude Craik, Honggi Jeon, Calvin Leung, Julian C. Berengut, Amy Geddes, Akio Kawasaki, Wonho Jhe, and Vladan Vuletić
Phys. Rev. Lett. 125, 123002 – Published 15 September 2020
Physics logo See synopsis: Hints of Dark Bosons
PDFHTMLExport Citation

Abstract

We measure isotope shifts for five Yb+ isotopes with zero nuclear spin on two narrow optical quadrupole transitions S21/2D23/2, S21/2D25/2 with an accuracy of 300Hz. The corresponding King plot shows a 3×107 deviation from linearity at the 3σ uncertainty level. Such a nonlinearity can indicate physics beyond the Standard Model (SM) in the form of a new bosonic force carrier, or arise from higher-order nuclear effects within the SM. We identify the quadratic field shift as a possible nuclear contributor to the nonlinearity at the observed scale, and show how the nonlinearity pattern can be used in future, more accurate measurements to separate a new-boson signal from nuclear effects.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 23 April 2020
  • Accepted 27 July 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.123002

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsNuclear PhysicsAtomic, Molecular & Optical

synopsis

Key Image

Hints of Dark Bosons

Published 15 September 2020

A signal predicted for a type of dark matter appears in the spectra of ytterbium isotopes.

See more in Physics

Authors & Affiliations

Ian Counts1,*, Joonseok Hur1,*, Diana P. L. Aude Craik1, Honggi Jeon2, Calvin Leung1, Julian C. Berengut3, Amy Geddes3, Akio Kawasaki4, Wonho Jhe2, and Vladan Vuletić1,†

  • 1Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
  • 3School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
  • 4W. W. Hansen Experimental Physics Laboratory and Department of Physics, Stanford University, Stanford, California 94305, USA

  • *I. C. and J. H. contributed equally to this work.
  • vuletic@mit.edu

See Also

Improved Isotope-Shift-Based Bounds on Bosons beyond the Standard Model through Measurements of the D23/2D25/2 Interval in Ca+

Cyrille Solaro, Steffen Meyer, Karin Fisher, Julian C. Berengut, Elina Fuchs, and Michael Drewsen
Phys. Rev. Lett. 125, 123003 (2020)

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 125, Iss. 12 — 18 September 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×