Correlating nonresonant di-electron searches at the LHC to the Cabibbo-angle anomaly and lepton flavor universality violation
نویسندگان
چکیده
In addition to the existing strong indications for lepton flavor universality violation in low-energy precision experiments, CMS Collaboration at CERN recently released an analysis of nonresonant dilepton pairs which could constitute first sign high-energy searches LHC. this article, we show that Cabibbo-angle anomaly, (apparent) row and column Cabibbo-Kobayashi-Maskawa (CKM) matrix unitarity with $\ensuremath{\approx}3\ensuremath{\sigma}$ significance, result can be correlated commonly explained a model-independent way by operator $[{Q}_{\ensuremath{\ell}q}^{(3)}{]}_{1111}=({\overline{\ensuremath{\ell}}}_{1}{\ensuremath{\gamma}}^{\ensuremath{\mu}}{\ensuremath{\sigma}}^{I}{\ensuremath{\ell}}_{1})({\overline{q}}_{1}{\ensuremath{\gamma}}_{\ensuremath{\mu}}{\ensuremath{\sigma}}^{I}{q}_{1})$. This is possible without violating bounds from search ATLAS (which interestingly also observed slightly more events than expected electron channel) nor $R(\ensuremath{\pi})=\ensuremath{\pi}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}/\ensuremath{\pi}\ensuremath{\rightarrow}e\ensuremath{\nu}$. We find combined preference new physics hypothesis $4.5\ensuremath{\sigma}$ predict $1.0004<R(\ensuremath{\pi})<1.0009$ (95% C.L.) tested near future forthcoming results PEN experiment.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.104.115016