Search for Majorana neutrinos in $B^- \to \pi^+\mu^-\mu^-$ decays - INSPIRE

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Search for Majorana neutrinos in $B^- \to \pi^+\mu^-\mu^-$ decays

LHCb

Collaboration

Jan 21, 2014

8 pages

Published in:

Phys.Rev.Lett. 112 (2014) 13, 131802

Published: Apr 3, 2014

e-Print:

1401.5361 [hep-ex]

DOI:

10.1103/PhysRevLett.112.131802

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\mathit \pi}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{+}}

Report number:

CERN-PH-EP-2014-002,
LHCB-PAPER-2013-064

Experiments:

CERN-LHC-LHCb

View in:

reference search191 citations

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Abstract: (APS)

A search for heavy Majorana neutrinos produced in the B-→π+μ-μ- decay mode is performed using 3 fb-1 of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV at the LHC. Neutrinos with masses in the range 250 to 5000 MeV and lifetimes from zero to 1000 ps are probed. In the absence of a signal, upper limits are set on the branching fraction B(B-→π+μ-μ-) as functions of neutrino mass and lifetime. These limits are on the order of 10-9 for short neutrino lifetimes of 1 ps or less. Limits are also set on the coupling between the muon and a possible fourth-generation neutrino.

Note:

6 pages, 6 figures

13.35.Hb
13.20.He
14.40.Nd
neutrino: Majorana
neutrino: lifetime
neutrino: mass
neutrino: heavy: search for
p p: scattering
family: 4
B-: branching ratio: upper limit

References(22)

Figures(7)

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