We present the results of a search for the b→dℓ⁺ℓ⁻ flavor-changing neutral-current rare decays B(+,0)→(η,ω,π(+,0),ρ(+,0))e+e− and B(+,0)→(η,ω,π0,ρ+)μ+μ− using a 711  fb^−1 data sample that contains 772×10^6  BB-bar events. The data were collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We find no evidence for signal and set upper limits on branching fractions at the 90% confidence level in the range (3.8–47)×10^−8 depending on the decay channel. The obtained limits are the world’s best results. This is the first search for the channels B(+,0)→(ω,ρ(+,0))e+e− and B(+,0)→(ω,ρ+)μ+μ−.

Search for Rare b→dℓ⁺ℓ⁻ Transitions at Belle

Tenchini, F.;
2024-01-01

Abstract

We present the results of a search for the b→dℓ⁺ℓ⁻ flavor-changing neutral-current rare decays B(+,0)→(η,ω,π(+,0),ρ(+,0))e+e− and B(+,0)→(η,ω,π0,ρ+)μ+μ− using a 711  fb^−1 data sample that contains 772×10^6  BB-bar events. The data were collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We find no evidence for signal and set upper limits on branching fractions at the 90% confidence level in the range (3.8–47)×10^−8 depending on the decay channel. The obtained limits are the world’s best results. This is the first search for the channels B(+,0)→(ω,ρ(+,0))e+e− and B(+,0)→(ω,ρ+)μ+μ−.
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/11586/581448
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 20
social impact