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.

Measurement of the branching fraction of the decay B- →d0ρ (770)- at Belle II

Tenchini, F.;
2024-01-01

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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/580879
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact