English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We introduce an improved model that links the frequency shift of the$^{133}\text{Cs}$ hyperfine Zeeman transitions $\vert F = 3, m_F>\longleftrightarrow \vert F = 4, m_F >$ to the Lorentz-violating Standard-ModelExtension (SME) coefficients of the proton and neutron. The new model usesLorentz transformations developed to second order in boost and additionallytakes the nuclear structure into account, beyond the simple Schmidt model usedpreviously in SME analyses, thereby providing access to both proton and neutronSME coefficients including the isotropic coefficient $\tilde{c}_{TT}$. Usingthis new model in a second analysis of the data delivered by the FO2 dual Cs/Rbfountain at Paris Observatory and previously analysed inarXiv:hep-ph/0601024v1, we improve by up to 12 orders of magnitude the presentmaximum sensitivities (see arXiv:0801.0287v9) on the $\tilde{c}_{Q}$,$\tilde{c}_{TJ}$ and $\tilde{c}_{TT}$ coefficients for the neutron and on the$\tilde{c}_{TT}$ coefficient for the proton, reaching respectively $10^{-20}$,$10^{-17}$, $10^{-13}$ and $10^{-15}$ GeV.

Lorentz-symmetry test at Planck-scale suppression with nucleons in a spin-polarized $^{133}$Cs cold atom clock