Flavor anomalies, the diphoton excess and a dark matter candidate

• Verfasst von: Bauer, Martin [VerfasserIn]
• Verfasst von: Neubert, Matthias [VerfasserIn]
• Titel: Flavor anomalies, the diphoton excess and a dark matter candidate
• Verf.angabe: Martin Bauer and Matthias Neubert
• Fussnoten: Gesehen am 10.01.2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2016
• Band/Heft Quelle: (2016) Artikel-Nummer 1512.06828, 6 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1567020127

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 $M \approx 750$ GeV is produced in gluon fusion via loops containing a scalar color- triplet leptoquark $\phi$. For a leptoquark mass $M_\phi \lesssim$ 1 TeV, the production cross section is naturally in the 10 fb range. A large $S \to \gamma \gamma$ branching ratio can be obtained by coupling the scalar S to new color-singlet fermions $\chi$ 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 $S \to \tau^+\tau^-$ could be a striking signature of this model.