KIT | KIT-Bibliothek | Impressum | Datenschutz

Complementarity of $B\rightarrow K^{(*)} \mu \bar{\mu }$ and $B\rightarrow K^{(*)} + \textrm{inv}$ for searches of GeV-scale Higgs-like scalars

Ovchynnikov, Maksym 1; Schmidt, Michael A.; Schwetz, Thomas ORCID iD icon 1
1 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)

Abstract:

The rare decays $B^+→K^+μ\bar{μ}$ and $B^0→K^{∗0}μ\bar{μ}$ provide the strongest constraints on the mixing of a light scalar with the Higgs boson for GeV-scale masses. The constraints sensitively depend on the branching ratio to muons. Additional decay channels like an invisible partial width may substantially weaken the constraints. This scenario will be probed at Belle II in $B→K^{(∗)}+$inv. We illustrate the complementarity of scalar decays to muons and invisible decays using the currently available results of LHCb and BaBar. We provide two simple model realisations providing a sizeable invisible scalar width, one based on a real scalar and one based on a $U(1)_{B−L}$ gauge symmetry. In both examples the scalar decays into heavy neutral leptons which can be motivated by the seesaw mechanism for neutrino masses.


Volltext §
DOI: 10.5445/IR/1000162521
Veröffentlicht am 26.09.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2023
Sprache Englisch
Identifikator KITopen-ID: 1000162521
HGF-Programm 51.13.05 (POF IV, LK 01) Theoretische Astroteilchenphysik
Umfang 18 S.
Vorab online veröffentlicht am 05.06.2023
Nachgewiesen in Dimensions
arXiv
Relationen in KITopen
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page