The invisible branching fractions of J/psi, psi(2S), and Upsilon(nS) to neutrino pairs are predicted at the 10^-8 to 10^-5 level, offering a way to measure the weak mixing angle at quarkonia mass scales.
Searches for invisible new particles at Belle II
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
Belle~II has unique sensitivity for a broad class of models postulating the existence of dark matter particles with masses in the MeV--GeV range. We present recent world-leading results from Belle~II searches for several non-SM particles. These include production of $Z'$ bosons, axion-like particles, and dark scalars in association with two muons in $e^+e^-$ collisions; long-lived (pseudo)scalars produced in decays of \textit{B}-mesons; and invisible particles produced in decays of $\tau$ leptons.
fields
hep-ph 1years
2024 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
Invisible decays of vector Charmonia and Bottomonia to determine the Weak Mixing Angle at quarkonia scale
The invisible branching fractions of J/psi, psi(2S), and Upsilon(nS) to neutrino pairs are predicted at the 10^-8 to 10^-5 level, offering a way to measure the weak mixing angle at quarkonia mass scales.