Speaker
Dr
Wan-lei Guo
(Institute of High Energy Physics, Chinese Academy of Sciences)
Description
We explore the electron neutrino signals from light dark matter (DM)
annihilation in the Sun for the large liquid scintillator detector
JUNO. In terms of the spectrum features of three typical DM
annihilation channels $\chi \chi \rightarrow \nu \bar{\nu},\tau^+
\tau^-, b \bar{b}$, we take two sets of selection conditions to
calculate the expected signals and atmospheric neutrino backgrounds
based on the Monte Carlo simulation data. Then the JUNO
sensitivities to the spin independent DM-nucleon and spin dependent
DM-proton cross sections are presented. It is found that the JUNO
projected sensitivities are much better than the current spin
dependent direct detection experimental limits for the $\nu
\bar{\nu}$ and $\tau^+ \tau^-$ channels. In the spin independent
case, the JUNO will give the better sensitivity to the DM-nucleon
cross section than the LUX and CDMSlite limits for the $\nu
\bar{\nu}$ channel with the DM mass lighter than 6.5 GeV. If the
$\nu \bar{\nu}$ or $\tau^+ \tau^-$ channel is dominant, the future
JUNO results are very helpful for us to understand the tension
between the DAMA annual modulation signal and other direct detection
exclusions.
Primary author
Dr
Wan-lei Guo
(Institute of High Energy Physics, Chinese Academy of Sciences)
