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Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 78: Suche nach neuen Teilchen 4

T 78.6: Vortrag

Mittwoch, 29. März 2017, 18:05–18:20, JUR 2

Search for heavy Majorana neutrinos in rare semileptonic B meson decays at the LHCb experiment — •Meriem Boubdir, Arno Heister, Christoph Langenbruch, and Stefan Schael — I. Physikalisches Institut B, RWTH Aachen

It is an open question of particles physics whether Neutrinos are Dirac or Majorana fermions. Neutrinos of Majorana-type (meaning they are their own antiparticles) would induce lepton number violating (LNV) processes. An example would be B meson decays with two same-sign leptons in the final state.
The LHCb experiment is an ideal environment for the search for these striking signatures due to the large bb production cross section. This talk presents an ongoing search for the LNV decay B+ → µ+ µ+ π using data collected by the LHCb experiment during the LHC Run 1 and 2. The analysis is extended by a search for the related decay Bc+ → µ+ µ+ π, which allows to probe Neutrino masses of up to ∼ 6   GeV. The selection of the signal modes and the suppression of possible backgrounds will be discussed. In addition, the expected limit on the branching fractions of the signal decays will be presented.

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