Search for the lepton-flavour violating decay $D^0 \to e^\pm\mu^\mp$ - INSPIRE

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Search for the lepton-flavour violating decay $D^0 \to e^\pm\mu^\mp$

LHCb

Collaboration

Dec 1, 2015

9 pages

Published in:

Phys.Lett.B 754 (2016) 167-175

Published: Mar 10, 2016

e-Print:

1512.00322 [hep-ex]

DOI:

10.1016/j.physletb.2016.01.029 (publication)

PDG:

{{\mathit D}^{0}}

\rightarrow

{{\mathit \mu}^{\pm}}{{\mathit e}^{\mp}}

Report number:

CERN-PH-EP-2015-306,
LHCb-PAPER-2015-048,
LHCB-PAPER-2015-048

Experiments:

CERN-LHC-LHCb

View in:

reference search68 citations

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Abstract: (Elsevier)

A search for the lepton-flavour violating decay D0→e±μ∓ is made with a dataset corresponding to an integrated luminosity of 3.0fb−1 of proton–proton collisions at centre-of-mass energies of 7 TeV and 8 TeV , collected by the LHCb experiment. Candidate D0 mesons are selected using the decay D⁎+→D0π+ and the D0→e±μ∓ branching fraction is measured using the decay mode D0→K−π+ as a normalization channel. No significant excess of D0→e±μ∓ candidates over the expected background is seen, and a limit is set on the branching fraction, B(D0→e±μ∓)<1.3×10−8 , at 90% confidence level. This is an order of magnitude lower than the previous limit and it further constrains the parameter space in some leptoquark models and in supersymmetric models with R-parity violation.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-048.html

p p: scattering
p p: colliding beams
D: leptonic decay
D: rare decay
lepton: flavor: violation
R parity: violation
D0: branching ratio: upper limit
supersymmetry
D: decay modes
background

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