Search for charged lepton flavor violating decays of ϒ (1S) - INSPIRE

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Search for charged lepton flavor violating decays of ϒ (1S)

Belle

Collaboration

•

S. Patra
(
- IISER, Mohali
)

Jan 24, 2022

21 pages

Published in:

JHEP 05 (2022) 095,
JHEP 05 (2022) 095

Published: May 16, 2022
and
Published: May, 2022

e-Print:

2201.09620 [hep-ex]

DOI:

10.1007/JHEP05(2022)095

PDG:

{{\mathit \Upsilon}{(1S)}}

\rightarrow

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

Report number:

Belle Preprint 2022-02; KEK Preprint 2021-59

Experiments:

KEK-BF-BELLE

View in:

reference search12 citations

Citations per year

Abstract: (Springer)

We present a search for the charged lepton-flavor-violating decays

\Upsilon(1S)\rightarrow\ell\ell^\prime

and radiative charged lepton-flavour-violating decays

\Upsilon(1S)\rightarrow\gamma\ell\ell^\prime

[

\ell,\ell^\prime = e, \mu, \tau

] using the 158 million

\Upsilon(2S)

sample collected by the Belle detector at the KEKB collider. This search uses

\Upsilon(1S)

mesons produced in

\pi^+\pi^-\Upsilon(1S)

transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level.

Note:

15 pages, 10 figures, submitted to JHEP

e+-e− Experiments
electron positron: annihilation
electron positron: colliding beams
lepton: flavor: violation
Upsilon(9460): leptonic decay
Upsilon(9460): radiative decay
Upsilon(9460): branching ratio: upper limit
BELLE
KEK-B
Upsilon(10020): electroproduction

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