Search for the decay $D_0 \to \pi^+ \pi^- \mu^+ \mu^-$ - INSPIRE

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Search for the decay $D_0 \to \pi^+ \pi^- \mu^+ \mu^-$

LHCb

Collaboration

Oct 9, 2013

10 pages

Published in:

Phys.Lett.B 728 (2014) 234-243

Published: Jan 20, 2014

e-Print:

1310.2535 [hep-ex]

DOI:

10.1016/j.physletb.2013.11.053

PDG:

{{\mathit D}^{0}}

\rightarrow

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

Report number:

LHCB-PAPER-2013-050,
CERN-PH-EP-2013-183

Experiments:

CERN-LHC-LHCb

View in:

reference search26 citations

Citations per year

Abstract: (Elsevier)

A search for the D0→π+π−μ+μ− decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0fb−1 recorded by the LHCb experiment at a centre-of-mass energy of 7 TeV. No signal is observed and an upper limit on the relative branching fraction with respect to the resonant decay mode D0→π+π−ϕ(→μ+μ−) , under the assumption of a phase-space model, is found to be B(D0→π+π−μ+μ−)/B(D0→π+π−ϕ(→μ+μ−))<0.96 at 90% confidence level. The upper limit on the absolute branching fraction is evaluated to be B(D0→π+π−μ+μ−)<5.5×10−7 at 90% confidence level. This is the most stringent to date.

D0: semileptonic decay
meson resonance
model: phase space
muon: pair production
p p: scattering
D0: branching ratio: upper limit
LHC-B
D*(2010): hadronic decay
dimuon: mass spectrum
neutral current: flavor changing

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