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T: Fachverband Teilchenphysik

T 105: Flavor IX

T 105.4: Talk

Thursday, March 23, 2023, 16:35–16:50, HSZ/0401

Probing light New Physics in invisible rare charm decays — •Dominik Suelmann and Gudrun Hiller — TU Dortmund University, Department of Physics, Otto-Hahn-Str.4, D-44221 Dortmund, Germany

We analyze rare |Δ c| = |Δ u| = 1 charm decays with missing energy in the final state and study their potential to probe different scenarios of light New Physics (NP). We study three-body and two-body decays of baryons and mesons and probe the sensitivities of different observables for the various light NP models. We find that the Λ_c → p νν missing energy distribution can distinguish between the scenario of only left-handed neutrinos and the scenario with additional light right-handed neutrinos. We also work out constrains from available experimental data for the two body decays Λ_c→ p + nothing and D→ π + nothing and point out the benefits of baryonic modes in rare decays.