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Measurement of the ratio of branching fractions mathcal{B}(B_(c)⁺ to J/psi K⁺)/mathcal{B}(B_(c)⁺ to J/psiπ⁺)
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arxiv 1607.06823 v5 pith:MOVELQHJ submitted 2016-07-22 hep-ex
Measurement of the ratio of branching fractions mathcal{B}(B_(c)⁺ to J/psi K⁺)/mathcal{B}(B_(c)⁺ to J/psiπ⁺)
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The ratio of branching fractions $R_{K/\pi} \equiv \mathcal{B}(B_{c}^{+} \to J/\psi K^{+})/\mathcal{B}(B_{c}^{+} \to J/\psi\pi^{+})$ is measured with $pp$ collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3${\mbox{fb}^{-1}}$. It is found to be $ R_{K/\pi} = 0.079\pm0.007\pm0.003$, where the first uncertainty is statistical and the second is systematic. This measurement is consistent with the previous LHCb result, while the uncertainties are significantly reduced.
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A unified study of the \(B_c\) meson: from spectrum and form factors to weak and radiative decays
hep-ph 2026-05 unverdicted novelty 3.0
A unified phenomenological study computes the B_c meson spectrum in a screened potential model and applies the results in QCD sum rules for weak decays after updating heavy-quark masses and refitting normalization.
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