Search for the Lepton Flavor Violation Process $J/\psi \to e\mu$ at BESIII

Ablikim, M.; Achasov, M.N.; Albayrak, O.; Ambrose, D.J.; An, F.F.; An, Q.; Bai, J.Z.; Ferroli, R.Baldini; Ban, Y.; Becker, J.

doi:10.1103/PhysRevD.87.112007

Search for the Lepton Flavor Violation Process $J/\psi \to e\mu$ at BESIII

BESIII

Collaboration

Apr 11, 2013

7 pages

Published in:

Phys.Rev.D 87 (2013) 112007

Published: Jun 17, 2013

e-Print:

1304.3205 [hep-ex]

DOI:

10.1103/PhysRevD.87.112007

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

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

Experiments:

View in:

pdf

reference search26 citations

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Abstract: (APS)

We search for the lepton-flavor-violating decay of the J/ψ into an electron and a muon using (225.3±2.8)×106 J/ψ events collected with the BESIII detector at the BEPCII. Four candidate events are found in the signal region, consistent with background expectations. An upper limit on the branching fraction of B(J/ψ→eμ)<1.6×10-7 (90% C.L.) is obtained.

12.60.-i
11.30.Hv
13.25.Gv
lepton: flavor: violation
BES
J/psi(3100)
branching ratio
Beijing Stor
background
electron positron: annihilation

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Figures(5)

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