3 papers
hep-ph2025
Dark light shining on
Patrick D. Bolton, Jernej F. Kamenik, MartÃn Novoa-Brunet
Recent Belle II data on show an excess consistent with a two-body decay involving a light invisible particle with mass around . We pre…
hep-ph2025
Impact of new invisible particles on observables
Patrick D. Bolton, Svjetlana Fajfer, Jernej F. Kamenik +1
Motivated by a recent Belle~II measurement that suggests an excess in the rare decay , and building upon our recent differential decay rate likelihood analy…
hep-ph2025
Signatures of Light New Particles in
Patrick D. Bolton, Svjetlana Fajfer, Jernej F. Kamenik +1
The recent Belle II observation of challenges theoretical interpretations in terms of Standard Model neutrino final states. Instead, we consider new physics…