Speaker
Suprabh Prakash
(Sun Yat-Sen University, Guangzhou)
Description
The existence of non-baryonic Dark Matter (DM) has been very well
established by various astronomical observations; and finding out a
viable DM candidate is one of the most important open-ended problems
in beyond Standard Model physics today. The Jiangmen Underground
Neutrino Observatory (JUNO) is a 20 kton multi-purpose underground
liquid scintillator detector with the main objective to determine the neutrino
mass hierarchy. It will also provide opportunities to study other important
topics in neutrino and astro-particle physics.
Here, we try to explore the capabilities of JUNO towards
indirect detection of DM. We consider the neutrino flux resulting from DM
annihilation inside the Sun. As a benchmark, we consider the channels
$\chi\chi\rightarrow\tau^{+}\tau^{-}$ and $\chi\chi\rightarrow\nu\bar\nu$.
The sensitivities are calculated based on the excess of neutrino events
beyond the atmospheric background. Only the muon events with track
lengths greater than 5 m within the detector have been considered.
For such events, the direction of muon tracks can be reconstructed
with an accuracy better than $1^\circ$. To search for DM induced
neutrino events from the Sun, we choose and observation cone with
a cone half angle $\psi = 30^{\circ}$. We have found that JUNO
sensitivity to spin-dependent scattering cross-section $\sigma^{SD}_{\chi p}$ is much better than the current direct detection constraints. In the case of spin-independent $\sigma^{SI}_{\chi p}$, JUNO is competitive with direct detection experiments for
$m_{\chi}<7~\textrm{GeV}$.
Author
Suprabh Prakash
(Sun Yat-Sen University, Guangzhou)
