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Searching for dark photons at the LHeC and FCC-he

D’Onofrio, Monica; Fischer, Oliver; Wang, Zeren Simon

Abstract:
Extensions of the Standard Model (SM) gauge group with a new U(1)X predict an additional gauge boson. Through kinetic mixing with the SM photons featured by a coupling ε, the ensuing so-called dark photons γ′, which acquire mass as a result of the breaking of the gauge group U(1)X, can interact with the SM field content. These massive dark photons can therefore decay to pairs of leptons, hadrons, or quarks, depending on their mass mγ′. In this work, we discuss searches for dark photons in the mass range around and below 1 GeV at the LHeC and FCC-he colliders. The signal is given by the displaced decays of the long-lived dark photon into two charged particles. We discuss the impact of conceivable irreducible (SM and machine-related) backgrounds and different signal efficiencies. Our estimates show that the LHeC and FCC-he can test a domain that is complementary to other present and planned experiments.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105844
Veröffentlicht am 17.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
KITopen-ID: 1000105844
HGF-Programm 51.01.01 (POF III, LK 01)
Teilchenphysik
Erschienen in Physical review / D
Band 101
Heft 1
Seiten Article: 015020
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 28.01.2020
Nachgewiesen in Scopus
Web of Science
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