Solar energy paper index
Probing Invisible Fermions in $B \to D^{*}\ell X_{\text{inv}}$ via Angular Observables
One-line summary
A solar energy research paper on Probing Invisible Fermions in $B \to D^{*}\ell X_{\text{inv}}$ via Angular Observables.
Engineering notes
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Chinese explanation / 中文解读
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Original abstract
Semileptonic decays $B \to D^{*} \ell X_{\text{inv}}$ provide a sensitive probe of light invisible particles, such as sterile neutrinos or dark-sector fermions. Within a general weak effective theory framework, we show that a massive invisible fermion induces distinctive modifications in the angular distributions. We identify observables with enhanced sensitivity to the invisible particle mass, allowing a clear discrimination of such scenarios, and highlight angular structures that differentiate left- and right-handed lepton-dark-sector currents.
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