30 July 2026 to 5 August 2026
Natal Convention Center
America/Sao_Paulo timezone

Search for the Lepton Flavour Violating decays $\Upsilon(2{\mathrm{S}}) \to e^{\pm}\mu^{\mp}$ and $\Upsilon(3{\mathrm{S}}) \to e^{\pm}\mu^{\mp}$

30 Jul 2026, 14:30
15m
Room #8 (Praiamar Natal Hotel & Convention)

Room #8

Praiamar Natal Hotel & Convention

R. Francisco Gurgel, 33 - Ponta Negra, Natal - RN, 59090-050
Talk Beyond the Standard Model Beyond the Standard Model

Speaker

Dr Nafisa Tasneem (St. Francis Xavier University)

Description

Charged lepton flavour violating (LFV) processes are unobservable in the Standard Model, but they are predicted to be enhanced in several new physics extensions. We present the results of a search for $\Upsilon(2{\mathrm{S}})$ and $\Upsilon(3{\mathrm{S}})$ LFV decays to $e^{\pm}\mu^{\mp}$. The search was conducted using data samples consisting of 99 million $\Upsilon(2{\mathrm{S}})$ and 122 million $\Upsilon(3{\mathrm{S}})$ mesons, collected at center-of-mass energies of 10.23 and 10.36 GeV, respectively, by the $BABAR$ detector at the SLAC PEP-II $e^+e^-$ collider.

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Authors

Fabio Anulli (Sapienza Universita e INFN, Roma I (IT)) Dr Nafisa Tasneem (St. Francis Xavier University) Nafisa Tasneem (St Francis Xavier University)

Presentation materials