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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Measurements of nuclear $\beta$-decay are commonly used to extract elementsof the quark-mixing Cabibbo-Kobayashi-Maskawa (CKM) matrix. The precision ofthese measurements is currently limited by theoretical uncertainties inelectroweak radiative corrections (EWRC) arising from so-called box diagrams,which involve the exchange of two gauge bosons. Two photon exchange (TPE) isthe most experimentally accessible of such processes, making it a naturalchoice for providing constraints on the theoretical frameworks used forcalculating EWRC. The cross section asymmetry between elastic $e^+/e^-$scattering is directly sensitive to this, as the TPE contribution to the crosssection has opposite sign for electrons and positrons. While charge asymmetrymeasurements have been performed on proton targets, no such data exists fornuclear targets. Proposed here is a measurement of the $e^+/e^-$ chargeasymmetry on various nuclei relevant to $\beta$-decay measurements used for CKMmatrix extraction. Determining the size of TPE through these processes canprovide important constraints on EWRC.

Measuring two photon exchange in elastic nuclear scattering with $e^+/e^-$ charge asymmetries