Journal Article

PUBDB-2023-04301

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Leading two-loop corrections to the Higgs di-photon decay in the Inert Doublet Model

Aiko, M. ; Braathen, J. (Corresponding author)DESY* ; Kanemura, S.

2025
Springer Heidelberg

This record in other databases:      

Please use a persistent id in citations: doi:10.1140/epjc/s10052-025-14184-z  doi:10.3204/PUBDB-2023-04301

Report No.: DESY-23-104; KEK-TH-2539; OU-HET-1194; arXiv:2307.14976

Abstract: Leading two-loop contributions to the di-photon decay of the Higgs boson are evaluated for the first time in the Inert Doublet Model (IDM). We employ for this calculation the Higgs low-energy theorem, meaning that we obtain corrections to the Higgs decay process by taking Higgs-field derivatives of the leading two-loop contributions to the photon self-energy. Specifically, we have included purely scalar corrections involving inert BSM Higgs bosons, as well as external-leg contributions involving both the inert scalars and fermions. Our calculation has been performed with a full on-shell renormalization, and in the gauge-less limit. We investigate our results numerically in two scenarios of the IDM: one with a light dark matter (DM) candidate (Higgs resonance scenario), and another with all additional scalars heavy (heavy DM scenario). In both cases, we find that the inclusion of two-loop corrections qualitatively modifies the behavior of the decay width, compared with the one-loop ($i.e.$ leading) order, and that they increase the deviation from the Standard Model. These large deviations can be tested at the High-Luminosity LHC.

Note: 20 pages, 6 figures; v2: major revision and extension of the calculation; v3: matches version published in EPJC

---

Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)520070247 - Untersuchungen von Neue Physik mit generischen Präzisionsberechnungen (520070247) (520070247)
3. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Aiko, M. ; Braathen, J. (Corresponding author)DESY* ; Kanemura, S.
Leading two-loop corrections to the Higgs di-photon decay in the inert doublet model
[10.3204/PUBDB-2025-02120]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---