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Forecasting dark showers at Belle II

Bernreuther, Elias ; Böse, Kai; Ferber, Torben 1; Hearty, Christopher; Kahlhoefer, Felix 2; Morandini, Alessandro; Schmidt-Hoberg, Kai
1 Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT)
2 Institut für Theoretische Teilchenphysik (TTP), Karlsruher Institut für Technologie (KIT)

Abstract:

Dark showers from strongly interacting dark sectors that confine at the GeV scale can give rise to novel signatures at e$^+$e$^−$ colliders. In this work, we study the sensitivity of B factory experiments to dark showers produced through an effective interaction arising from a heavy off-shell mediator. We show that a prospective search for displaced vertices from GeV-scale long-lived particles at Belle II can improve the sensitivity to dark showers substantially compared to an existing search at BaBar. We compare the sensitivity of searches for displaced signals to searches for promptly produced resonances at BaBar and KLOE and calculate sensitivity projections for a single-photon search at Belle II to invisible dark showers produced through an effective interaction. The underlying structure of the effective interaction can be resolved at higher-energy experiments, where the mediator can be produced on-shell. To study the resulting constraints, we update electroweak precision bounds on kinetically mixed Z′ bosons and reinterpret a search for low-mass di-muon resonances at LHCb in terms of dark showers. We find that LHCb and Belle II are most sensitive to different particle decay lengths, underscoring the complementarity of LHC and intensity frontier experiments.


Verlagsausgabe §
DOI: 10.5445/IR/1000153759
Veröffentlicht am 14.12.2022
Originalveröffentlichung
DOI: 10.1007/JHEP12(2022)005
Scopus
Zitationen: 7
Web of Science
Zitationen: 4
Dimensions
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1029-8479, 1126-6708, 1127-2236
KITopen-ID: 1000153759
Erschienen in Journal of High Energy Physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2022
Heft 12
Seiten Art.-Nr.: 5
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 01.12.2022
Schlagwörter Dark Matter at Colliders, New Light Particles
Nachgewiesen in Web of Science
Dimensions
Scopus
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