Search for Rare Decays of <math display="inline"><msup><mi>D</mi><mn>0</mn></msup></math> Mesons into Two Muons - INSPIRE

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Search for Rare Decays of $D^{0}$ Mesons into Two Muons

LHCb

Collaboration

Dec 21, 2022

13 pages

Published in:

Phys.Rev.Lett. 131 (2023) 4, 041804

Published: Jul 26, 2023

e-Print:

2212.11203 [hep-ex]

DOI:

10.1103/PhysRevLett.131.041804 (publication)

PDG:

{{\mathit D}^{0}}

\rightarrow

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

Report number:

LHCb-PAPER-2022-029,
CERN-EP-2022-273

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

A search for the very rare

D^{0} \to μ^{+} μ^{-}

decay is performed using data collected by the LHCb experiment in proton-proton collisions at

\sqrt{s} = 7

, 8, and 13 TeV, corresponding to an integrated luminosity of

9 {fb}^{- 1}

. The search is optimized for

D^{0}

mesons from

D^{* +} \to D^{0} π^{+}

decays but is also sensitive to

D^{0}

mesons from other sources. No evidence for an excess of events over the expected background is observed. An upper limit on the branching fraction of this decay is set at

B (D^{0} \to μ^{+} μ^{-}) < 3.1 \times 10^{- 9}

at a 90% C.L. This represents the world’s most stringent limit, constraining models of physics beyond the standard model.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-029.html (LHCb public pages)

p p: scattering
p p: colliding beams
new physics: search for
D*(2010)+: hadronic decay
D0: rare decay
D0: leptonic decay
muon: pair production
D0: branching ratio
branching ratio: upper limit
LHC-B

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Figures(36)

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