Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 88: Flavor Physik III

T 88.4: Talk

Thursday, March 22, 2018, 17:15–17:30, Z6 - SR 2.006

Background studies of B → K^(*) ν ν decays at Belle II — •James Kahn and Thomas Kuhr — LMU Munich

The B → K^(*) ν ν decays provide theoretically clean, experimentally measurable instances of the flavour changing neutral current process b → s ν ν, which presents an excellent opportunity to investigate physics beyond the standard model. The missing energies of the two neutrinos make the measurement experimentally challenging and require the reconstruction of the spectator B meson in e⁺ e⁻ → Υ(4S) → B B events. Observation of the B → K^(*) ν ν decays will only become possible with the large data set that will be collected at the upgraded Belle II detector at the SuperKEKB accelerator in Tsukuba, Japan. A challenge of this decay analysis will be the understanding and suppression of the backgrounds. This talk presents a status update on the ongoing analysis preparation and progress of the development of new techniques to identify and simulate background events in sufficient volumes for statistical analysis.