References & Citations
High Energy Physics - Experiment
Title: Measurement of the branching fraction of the decay $B^- \to D^0 ρ(770)^-$ at Belle II
(Submitted on 16 Apr 2024)
Abstract: We measure the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance. We reconstruct $8360\pm 180$ decays from an analysis of the distributions of the $B^-$ energy and the $\rho(770)^-$ helicity angle. We determine the branching fraction to be $(0.939 \pm 0.021\mathrm{(stat)} \pm 0.050\mathrm{(syst)})\%$, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.
Submission history
From: Riccardo Manfredi [view email][v1] Tue, 16 Apr 2024 19:48:35 GMT (168kb,D)
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