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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Leading two-loop contributions to the di-photon decay of the Higgs boson areevaluated for the first time in the Inert Doublet Model (IDM). We employ forthis calculation the Higgs low-energy theorem, meaning that we obtaincorrections to the Higgs decay process by taking Higgs-field derivatives of theleading two-loop contributions to the photon self-energy. Specifically, we haveincluded purely scalar corrections involving inert BSM Higgs bosons, as well asexternal-leg contributions involving both the inert scalars and fermions. Ourcalculation has been performed with a full on-shell renormalization, and in thegauge-less limit. We investigate our results numerically in two scenarios ofthe IDM: one with a light dark matter (DM) candidate (Higgs resonancescenario), and another with all additional scalars heavy (heavy Higgsscenario). In both cases, we find that the inclusion of two-loop correctionsqualitatively modifies the behavior of the decay width, compared with theone-loop ($i.e.$ leading) order, and that they increase the deviation from theStandard Model. These large deviations can be tested at the High-LuminosityLHC.

Leading two-loop corrections to the Higgs di-photon decay in the Inert Doublet Model