Using a sample of 88.8×10^6 BB̅ events collected with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center, we measure the branching fractions of seven color-suppressed B-meson decays: B(B0→D0π0)=[2.9±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0π0)=[2.9±0.4(stat)±0.5(syst)]×10-4, B(B0→D0η)=[2.5±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0η)=[2.6±0.4(stat)±0.4(syst)]×10-4, B(B0→D0ω)=[3.0±0.3(stat)±0.4(syst)]×10-4, B(B0→D*0ω)=[4.2±0.7(stat)±0.9(syst)]×10-4, and B(B0→D0η′)=[1.7±0.4(stat)±0.2(syst)]×10-4. We set the 90% confidence-level upper limit: B(B0→D*0η′)<2.6×10-4. The channels B0→D*0η, D*0ω, and D0η′ are seen with more than five-sigma statistical significance. All of these branching fractions are significantly larger than theoretical expectations based on the “naive” factorization model.

Measurement of branching fractions of color-suppressed decays of the B0 meson to D(*)0π0, D(*)0η, D(*)0ω, and D0η′

MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004

Abstract

Using a sample of 88.8×10^6 BB̅ events collected with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center, we measure the branching fractions of seven color-suppressed B-meson decays: B(B0→D0π0)=[2.9±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0π0)=[2.9±0.4(stat)±0.5(syst)]×10-4, B(B0→D0η)=[2.5±0.2(stat)±0.3(syst)]×10-4, B(B0→D*0η)=[2.6±0.4(stat)±0.4(syst)]×10-4, B(B0→D0ω)=[3.0±0.3(stat)±0.4(syst)]×10-4, B(B0→D*0ω)=[4.2±0.7(stat)±0.9(syst)]×10-4, and B(B0→D0η′)=[1.7±0.4(stat)±0.2(syst)]×10-4. We set the 90% confidence-level upper limit: B(B0→D*0η′)<2.6×10-4. The channels B0→D*0η, D*0ω, and D0η′ are seen with more than five-sigma statistical significance. All of these branching fractions are significantly larger than theoretical expectations based on the “naive” factorization model.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

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: http://hdl.handle.net/11577/2433948
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 129
social impact