Probing dark sectors with long-lived particles at belle II

• Verfasst von: Filimonova, Anastasiia [VerfasserIn]
• Verfasst von: Schäfer, Ruth [VerfasserIn]
• Verfasst von: Westhoff, Susanne [VerfasserIn]
• Titel: Probing dark sectors with long-lived particles at belle II
• Verf.angabe: Anastasiia Filimonova, Ruth Schäfer, Susanne Westhoff
• E-Jahr: 2019
• Jahr: 8 Nov 2019
• Umfang: 7 S.
• Fussnoten: Gesehen am 19.02.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2019
• Band/Heft Quelle: (2019) Artikel-Nummer 1911.03490, 7 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Experiment
• Sach-SW: High Energy Physics - Phenomenology
• K10plus-PPN: 1690348925

Abstract

We propose a new search for light scalar singlets in rare meson decays. For tiny interactions, the scalar is long-lived at detector scales and decays into displaced pairs of leptons or light mesons. We show that Belle II has a remarkable potential to probe scalars in the GeV range with couplings as small as $10^{-5}$. The predicted sensitivity is higher than at the long-baseline experiments FASER and NA62. We also investigate signatures of invisibly decaying scalars in rare meson decays with missing energy.