Search for the lepton flavor violating decay $J/\psi\to e\mu$

Ablikim, Medina; Achasov, Mikhail N.; Adlarson, Patrik Adlarsson; Albrecht, Malte; Aliberti, Riccardo; Amoroso, Antonio; An, Meiru; An, Qi; Bai, Xuhong; Bai, Yu

doi:10.1007/s11433-022-1995-0

Search for the lepton flavor violating decay $J/\psi\to e\mu$

BESIII

Collaboration

Jun 28, 2022

12 pages

Published in:

Sci.China Phys.Mech.Astron. 66 (2023) 2, 221011

Published: Nov 18, 2022

e-Print:

2206.13956 [hep-ex]

DOI:

10.1007/s11433-022-1995-0

Experiments:

BEPC-BES,
BEPC-BES-III

View in:

ADS Abstract Service

pdf

reference search14 citations

Citations per year

Abstract: (Springer)

We present a search for the lepton flavor violating decay J/ψ → e

^{±}

μ

^{∓}

using 8.998 × 10

^{9}

J/ψ events collected with the BESIII detector at the BEPCII e

^{+}

e

^{−}

storage ring. No excess of signal above background is observed; we therefore set an upper limit on the branching fraction of

{\cal B}\left( {J/\psi \to {e^ \pm }{\mu ^ \mp }} \right) < \,4.5 \times {10^{ - 9}}

at the 90% confidence level. Improving the previous best result by a factor of more than 30, this measurement places the most stringent limit to date on lepton flavor violation in the heavy quarkonium sector.

Note:

12 pages, 4 figures

BESIII
e+e− experiments
charmonium
lepton flavor violating decay
electron positron: annihilation
electron positron: colliding beams
lepton: flavor: violation
J/psi(3100): rare decay
J/psi(3100): leptonic decay
quarkonium: heavy

References(0)

Figures(7)

Loading ...

Search for the lepton flavor violating decay J/ψ→eμJ/\psi\to e\muJ/ψ→eμ

Citations per year

Search for the lepton flavor violating decay $J/\psi\to e\mu$