Searches for Majorana neutrinos in B- decays
LHCb Collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves Jr, S. Amato, Y. Amhis, J., Anderson, R. B. Appleby, O. Aquines Gutierrez
TL;DR
This paper reports on searches for heavy Majorana neutrinos in B- meson decays using LHCb data, setting upper limits on their production and decay rates due to no observed signals.
Contribution
First search for Majorana neutrinos in B- decays with specific hadronic and muon final states using LHCb data, establishing new upper limits.
Findings
No evidence of Majorana neutrinos found.
Upper limits set on neutrino production as a function of mass.
Constraints on B- decay branching fractions.
Abstract
Searches for heavy Majorana neutrinos in B- decays in final states containing hadrons plus a \mu- \mu- pair have been performed using 0.41/fb of data collected with the LHCb detector in proton-proton collisions at a center-of-mass energy of 7 TeV. The D+ \mu- \mu- and D*+ \mu- \mu- final states can arise from the presence of virtual Majorana neutrinos of any mass. Other final states containing \pi+, Ds+, or D0\pi+ can be mediated by an on-shell Majorana neutrino. No signals are found and upper limits are set on Majorana neutrino production as a function of mass, and also on the B- decay branching fractions.
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