Year: 2025
Type: article
Abstract: The CMS experiment results on $$R(J/\psi)=\mathcal{B}(B_{c}^{+}\to J/\psi\tau^{+}\nu_{\tau})/\mathcal{B}(B_{c}^{+}\to J/\psi\mu^{+}\nu_{\mu})$$ lepton flavor universality observable are reported using two channels of reconstruction of the $$\tau$$ lepton: $$\tau^{+}\rightarrow\mu^{+}\nu_{\mu}\bar{\nu_{\tau}}$$ (leptonic) and $$\tau^{+}\to\pi^{+}\pi^{-}\pi^{+}(+\pi^{0})\bar{\nu_{\tau}}$$ (hadronic). These measurements use 13 TeV proton–proton collision data from the LHC Run 2. The results are consistent with the predictions of the Standard Model.
Source: Physics of Atomic Nuclei
Author: Alexander Sedelnikov
Institution: Moscow Institute of Physics and Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7128440919