Long-lived dark Higgs and inelastic dark matter at Belle II

Journal of High Energy Physics

Torben Ferber¹  Kai Schmidt-Hoberg¹  Camilo Garcia-Cely¹  Michael Duerr²  Christopher Hearty³ 

[1] DESY, Notkestrasse 85, D-22607, Hamburg, Germany;DESY, Notkestrasse 85, D-22607, Hamburg, Germany;Department of Physics and Astronomy, University of British Columbia, Agronomy Road, V6T 1Z1, Vancouver, BC, Canada;Institute of Particle Physics, University of Victoria, Finnerty Road, V8W 2Y2, Victoria, BC, Canada;Department of Physics and Astronomy, University of British Columbia, Agronomy Road, V6T 1Z1, Vancouver, BC, Canada;Institute of Particle Physics, University of Victoria, Finnerty Road, V8W 2Y2, Victoria, BC, Canada;

关键词: Dark matter;    Beyond Standard Model;    e;   

DOI  :  10.1007/JHEP04(2021)146

来源: Springer

【 摘 要 】

Inelastic dark matter is an interesting scenario for light thermal dark matter which is fully consistent with all cosmological probes as well as direct and indirect dark matter detection. The required mass splitting between dark matter χ1 and its heavier twin χ2 is naturally induced by a dark Higgs field which also provides a simple mechanism to give mass to the dark photon A′ present in the setup. The corresponding dark Higgs boson h′ is naturally the lightest dark sector state and therefore decays into Standard Model particles via Higgs mixing. In this work we study signatures with displaced vertices and missing momentum at Belle II, arising from dark Higgs particles produced in association with dark matter. We find that Belle II can be very sensitive to this scenario, in particular if a displaced vertex trigger is available in the near future.

【 授权许可】

CC BY