Speaker
Description
Vector boson mediation between visible and dark sectors is a popular theoretical proposal awaiting experimental test for different model parameter ranges. We take advantage of the enhancement on thermally averaged annihilation cross section $\langle \sigma v \rangle$ in the present day universe as compared to its early universe value from two parameter scenarios, namely the resonance enhancement scenario with $2m_\chi\simeq m_V$ or Sommerfeld enhancement scenario with $m_\chi > m_V$ and $\alpha_\chi \gg v$. Here $m_\chi$ and $m_V$ are masses of dark matter (DM) and vector boson mediator, respectively, while $\alpha_\chi $ is defined as $g_\chi^2/4\pi$ with $g_\chi$ the coupling between DM and vector boson mediator. Using ANTARES and IceCube published upper bounds on $\langle \sigma (\chi\bar{\chi}\to \nu\bar{\nu}) v \rangle$ from their searches for $\chi\bar{\chi}\to \nu\bar{\nu}$ in the galactic halo and the estimated sensitivities of these detectors to $\chi\bar{\chi}\to VV \to \nu\bar{\nu}\nu\bar{\nu}$, we derive (expected) constraints to dark sector parameters. For $m_\chi\gg m_V$, we found that the $m_\chi$ range would be tightly constrained by analyzing the annihilation channel $\chi\bar{\chi}\to VV \to \nu\bar{\nu}\nu\bar{\nu}$.
| Neutrino Properties | experimental measurements of oscillation parameters |
|---|---|
| Neutrino Telescopes & Multi-messenger | neutrinos from galactic and extragalactic astrophysical sources; exploration of physics beyond the Standard Model with neutrino telescopes |
| Neutrino Theory & Cosmology | no tight connection to the items below |
| Data Science and Detector R&D | no tight connections to the items below |
