Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 98: Topics in flavor physics

T 98.3: Talk

Friday, April 3, 2020, 11:30–11:45, H-HS XII

Measurement of (anti)deuteron production at Belle II — Elio Monaco and •Nathalie Eberlein for the Belle II collaboration — LMU München

One of the biggest hurdles in our modern understanding of cosmology comes from dark matter. Indirect searches for dark matter in astrophysical sources rely mainly on the detection of cosmic (anti)deuterons. Production mechanisms for (anti)deuterons are mostly modelled using the coalescence model, which is poorly understood.

Our work aims to measure (anti)deuteron production in e⁺e⁻ collisions and compare its value to theoretical models, as well as the efficiency of particle identification variables, at the Belle II experiment. First, the performance of particle identification variables is investigated with untagged Λ → pπ for different detector components.

Then, cross-section measurements of inclusive e⁻e⁺→ d(d)+X processes are performed at the center of mass energy of 10.58 GeV, for both Monte Carlo generated events and real data.