TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2022
DA  - 2022//
TI  - Search for Lepton Flavor Violation in Upsilon(3S) -> e(+/-)mu(-/+)
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 091804
EP  - 7pp
VL  - 128
IS  - 9
PB  - Amer Physical Soc
AB  - We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a b quark and b antiquark bound state. We look for the LFV decay Upsilon(3S) -> e(+/-) mu(-/+) in a sample of 118 million gamma(3S) mesons from 27 fb(-1) of data collected with the BABAR detector at the SLAC PEP-II e(+) e(-) collider operating with a 10.36 GeV center-of-mass energy. No evidence for a signal is found, and we set a limit on the branching fraction B[Upsilon(3S) -> e(+/-) mu(-/+)] < 3.6 x 10(-7) at 90% C. L. This result can be interpreted as a limit Lambda(NP)/g(NP)(2) > 80 TeV on the energy scale Lambda(NT) divided by the coupling-squared g(NP)(2) of relevant new physics (NP).
SN  - 0031-9007
UR  - https://arxiv.org/abs/2109.03364
UR  - https://doi.org/10.1103/PhysRevLett.128.091804
DO  - 10.1103/PhysRevLett.128.091804
LA  - English
N1  - WOS:000766760100005
ID  - BABARCollaborationLees_etal2022
ER  -