We study the decays B0→J/ψπ+π- and B+→J/ψπ+π0, including intermediate resonances, using a sample of 382×10^6 BB̅ pairs recorded by the BABAR detector at the PEP-II e+e- B factory. We measure the branching fractions B(B0→J/ψρ0)=(2.7±0.3±0.2)×10-5 and B(B+→J/ψρ+)=(5.0±0.7±0.3)×10-5. We also set the following upper limits at the 90% confidence level: B(B0→J/ψπ+π- nonresonant)<1.2×10-5, B(B0→J/ψf2)<4.6×10-6, and B(B+→J/ψπ+π0 nonresonant)<7.3×10-6. We measure the charge asymmetry in charged B decays to J/ψρ to be -0.11±0.12±0.08.

Branching fraction and charge asymmetry measurements in B→J/ψππ decays

SIMI, GABRIELE;GAZ A;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2007

Abstract

We study the decays B0→J/ψπ+π- and B+→J/ψπ+π0, including intermediate resonances, using a sample of 382×10^6 BB̅ pairs recorded by the BABAR detector at the PEP-II e+e- B factory. We measure the branching fractions B(B0→J/ψρ0)=(2.7±0.3±0.2)×10-5 and B(B+→J/ψρ+)=(5.0±0.7±0.3)×10-5. We also set the following upper limits at the 90% confidence level: B(B0→J/ψπ+π- nonresonant)<1.2×10-5, B(B0→J/ψf2)<4.6×10-6, and B(B+→J/ψπ+π0 nonresonant)<7.3×10-6. We measure the charge asymmetry in charged B decays to J/ψρ to be -0.11±0.12±0.08.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
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: https://hdl.handle.net/11577/2442016
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 16
  • OpenAlex ND
social impact