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Abstract <p>The CMS experiment results on <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(R(J/\psi)=\mathcal{B}(B_{c}^{+}\to J/\psi\tau^{+}\nu_{\tau})/\mathcal{B}(B_{c}^{+}\to J/\psi\mu^{+}\nu_{\mu})\)</EquationSource> <!--NuclPhys2560171Sedelnikov-m3--> </InlineEquation> lepton flavor universality observable are reported using two channels of reconstruction of the <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\tau\)</EquationSource> <!--NuclPhys2560171Sedelnikov-m4--> </InlineEquation> lepton: <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\tau^{+}\rightarrow\mu^{+}\nu_{\mu}\bar{\nu_{\tau}}\)</EquationSource> <!--NuclPhys2560171Sedelnikov-m5--> </InlineEquation> (leptonic) and <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(\tau^{+}\to\pi^{+}\pi^{-}\pi^{+}(+\pi^{0})\bar{\nu_{\tau}}\)</EquationSource> <!--NuclPhys2560171Sedelnikov-m6--> </InlineEquation> (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.</p>

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Measurements of Lepton Flavor Universality in \({B_{c}^{+}}\) Meson Decays

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Alexander Sedelnikov

摘要

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.