Flavor anomalies, the 750 GeV diphoton excess, and a dark matter candidate

• Verfasst von: Bauer, Martin [VerfasserIn]
• Verfasst von: Neubert, Matthias [VerfasserIn]
• Titel: Flavor anomalies, the 750 GeV diphoton excess, and a dark matter candidate
• Verf.angabe: Martin Bauer and Matthias Neubert
• Titel Quelle: Enthalten in: Physical review
• Jahr Quelle: 2016
• Band/Heft Quelle: 93(2016,11) Artikel-Nummer 115030, 6 Seiten
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.93.115030
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565493397

Abstract

We argue that the diphoton excess recently reported by ATLAS and CMS can be explained, along with several anomalies seen in the flavor sector, in models where a Standard Model singlet scalar resonance with mass MS≈750 GeV is produced in gluon fusion via loops containing a scalar color-triplet leptoquark ϕ. For a leptoquark mass Mϕ≲1 TeV, the production cross section is naturally in the 10 fb range. A large S→γγ branching ratio can be obtained by coupling the scalar S to new color-singlet fermions χ with electroweak scale masses, which can be part of an SU(2)L multiplet, whose neutral component has the right mass and quantum numbers to be a dark matter candidate. Our model reveals a connection between flavor anomalies, the nature of dark matter and a new scalar, which acts as a mediator to the dark sector. The loop-mediated decay S→τ+τ− could be a striking signature of this model.