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

被引：90

作者：

Counts, Ian ^{[1
,2
]}

Hur, Joonseok ^{[1
,2
]}

Craik, Diana P. L. Aude ^{[1
,2
]}

Jeon, Honggi ^{[3
]}

Leung, Calvin ^{[1
,2
]}

Berengut, Julian C. ^{[4
]}

Geddes, Amy ^{[4
]}

Kawasaki, Akio ^{[5
,6
]}

Jhe, Wonho ^{[3
]}

Vuletic, Vladan ^{[1
,2
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Res Lab Elect, Cambridge, MA 02139 USA

[3] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea

[4] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[5] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA

[6] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 12期

基金：

澳大利亚研究理事会; 欧盟地平线“2020”;

关键词：

CLOCK TRANSITION; REFORMULATION; EXISTENCE; LIFETIME; PROGRAM; RADII; FOCK;

D O I：

10.1103/PhysRevLett.125.123002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure isotope shifts for five Yb+ isotopes with zero nuclear spin on two narrow optical quadrupole transitions S-2(1/2) -> D-2(3/2), S-2(1/2) -> E-2(4/2) with an accuracy of similar to 300 Hz. The corresponding King plot shows a 3 x 10(-7) deviation from linearity at the 3 sigma 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.

引用

页数：7

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