Resurrecting the fraternal twin WIMP miracle

نویسندگان

چکیده

In twin Higgs models that contain the minimal particle content required to address little hierarchy problem (i.e., fraternal models), tau has been identified as a promising candidate for dark matter. this class of scenarios, however, elastic scattering cross section with nuclei exceeds bounds from XENON1T and other recent direct detection experiments. paper, we propose modification scenario call ${\mathbb{Z}}_{2}\mathrm{FTH}$, incorporating visible hypercharged scalars (with $Y=2$) which break electromagnetism. This leads new mass terms are unrelated its Yukawa coupling, well additional annihilation channels via massive photon. We show these features make it possible right-handed freeze out an acceptable thermal relic abundance while at rate is below existing constraints. Nonetheless, large portions currently viable parameter space in model within reach planned The prospects indirect using gamma rays cosmic-ray antiprotons also model. Furthermore, if neutrino light, predicted deviation $\mathrm{\ensuremath{\Delta}}{N}_{\mathrm{eff}}\ensuremath{\approx}0.1$ would be Stage 4 cosmic microwave background Finally, high luminosity LHC should able probe entire ${\mathbb{Z}}_{2}\mathrm{FTH}$ through charged scalar searches. discuss how searches long-lived particles starting constrain models.

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ژورنال

عنوان ژورنال: Physical review

سال: 2022

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevd.105.035033