Search for low-mass resonances decaying to $ττ$ in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV

An inclusive search is presented for spin-zero bosons decaying to $\\tau\\tau$ in a previously unexplored mass range between 20 and $60~\\mathrm{GeV}$ using proton-proton collision data at $\\sqrt{s}=13.6~\\mathrm{TeV}$, corresponding to an integrated luminosity of $61.9~\\mathrm{fb}^{-1}$ recorded by CMS in 2022--2023. The search is performed using a high-rate trigger stream in combination with a novel low-momentum hadronic tau reconstruction algorithm. No significant excess above the standard model background is observed. Upper limits on the product of the spin-zero resonance production cross section and branching fraction to $\\tau\\tau$ are set at $95\\%$ confidence level between 40 and $400~\\mathrm{pb}$.