Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Flavor Physik I

T 39.5: Vortrag

Dienstag, 20. März 2018, 17:35–17:50, Z6 - SR 2.006

Search for B -> K(*) nu nu with inclusive tag B reconstruction — •Benjamin Haser, Thomas Kuhr, and James Kahn — Ludwig-Maximilians-Universität München

Rare B decays with one neutrino and one anti/neutrino in the final state, belong to the theoretically cleanest flavor-changing neutral current (FCNC) processes. One decay channel is the B -> K(*) nu nu (b -> s nu nu) which is sensitive to physics beyond the standard model (SM). The trick for these measurements is to reconstruct all decay particles of one of the B mesons. However, in this talk, the reconstruction is performed by inclusive B meson reconstruction techniques where the full B meson decay chain is not explicitly reconstructed. The basic idea of an inclusive B meson tag reconstruction is to combine the four-momenta of all particles in the rest of event signal-side B candidate. The achieved tagging efficiency is usually one order of magnitude above the hadronic and semileptonic tagging methods. In consequence, the methods suffer from a high background as well as a very impure tag sample.