Belle II Document Server 3 records found  Search took 0.00 seconds. 
1. Measurement of the branching fraction for the decay $B \to K^{\ast}(892)\ell^+\ell^-$ at Belle II / Seema Choudhury [BELLE2-CONF-PH-2022-009]
20 September 2022

We report a measurement of the branching fraction of $B \to K^{\ast}(892)\ell^+\ell^-$ decays, where $\ell^+\ell^- = \mu^+\mu^-$ or $e^+e^-$, using electron-positron collisions recorded at an energy at or near the $\Upsilon(4S)$ mass and corresponding to an integrated luminosity of $189$ fb$^{-1}$ [...]
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2. Search for lepton flavor universality violation in leptonic tau decays with 1x1 and 3x1 topologies. / The Belle II Collaboration [BELLE2-NOTE-PL-2021-009]
07 September 2021

This public plot document presents MC sensitivity studies for the search for LFU violation in $\tau \rightarrow \ell \bar{\nu} \nu$ decays using 1x1 and 3x1 prong $\tau$-pair events..
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3. Sensitivity studies on the lepton universality in the channel $\Upsilon(nS)\rightarrow \ell \ell$ via initial-state radiation / Gian Luca Pinna Angioni ; Umberto Tamponi [BELLE2-NOTE-PL-2021-006]
16 July 2021

In this note, we present the results of sensitivity studies on the lepton universality in the channel ϒ(nS) → 𝓵𝓵 via initial-state radiation (ISR). [...]
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