What question did this study set out to answer?

This research aims to search for low-mass resonances decaying to tau lepton pairs and to measure the Υ → τ +τ − decay.

May 17, 2026Open Access

Search for low-mass resonances decaying to τ τ and measurement of the Y → τ τ decay in proton-proton collisions at √S = 13.6 TeV

Puntos clave

This research aims to search for low-mass resonances decaying to tau lepton pairs and to measure the Υ → τ +τ − decay.
Analyzed proton-proton collisions at √s = 13.6 TeV
Utilized a high-rate data stream and a novel low-pT hadronic tau reconstruction algorithm
Data from the CMS experiment covering 61.9 fb−1 recorded in 2022–2023.
No significant excess observed for low-mass resonances in the range of 20–60 GeV.
The Υ → τ +τ − decay process has a measured cross section of σ = 3.5 ± 0.71(stat) ± 0.71(syst) nb.

Resumen

An inclusive search for a low-mass resonance decaying to τ -lepton pairs is presented, covering20–60 GeV. The analysis uses proton-proton collisions at √s = 13.6 TeV, corresponding to 61.9 fb−1 recorded by CMS in 2022–2023. A dedicated high-rate data stream and a novel low-pT hadronic tau reconstruction algorithm enhance sensitivity to previously inaccessible regions. No significant excess is observed. The Υ → τ +τ − process is observed, with a measured cross section of σ = 3.5 ± 0.71(stat) ± 0.71(syst) nb.

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