Speaker
Dr
Jayita Lahiri
(II. Theoretical Institute for Physics, University of Hamburg)
Description
We study the coscattering mechanism in a simple Higgs portal which adds two real singlet scalars to the Standard Model. In this scenario, the lighter scalar is stabilized by a single $\mathcal{Z}_2$ symmetry and acts as the dark matter relic, whose freeze-out is driven by conversion processes. The heavier scalar becomes an unstable state which participates actively in the coscattering. We find viable parameter regions fulfilling the measured relic abundance, while evading direct detection and big-bang nucleosynthesis bounds. In addition, we discuss collider prospects for the heavier scalar as a long-lived particle at present and future detectors.
Authors
Dr
Bastián Díaz Sáez
(Instituto de Física, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago, Chile)
Dr
Jayita Lahiri
(II. Theoretical Institute for Physics, University of Hamburg)
Mr
Killian Möhling
(Institut für Kern- und Teilchenphysik, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany)
