First observations and measurements of the branching fractions of the B̅ s0→D+D-, B̅ s0→Ds+D- and B̅ s0→D0D̅ 0 decays are presented using 1.0  fb-1 of data collected by the LHCb experiment. These branching fractions are normalized to those of B̅ 0→D+D-, B0→D-Ds+ and B-→D0Ds-, respectively. An excess of events consistent with the decay B̅ 0→D0D̅ 0 is also seen, and its branching fraction is measured relative to that of B-→D0Ds-. Improved measurements of the branching fractions B(B̅ s0→Ds+Ds-) and B(B-→D0Ds-) are reported, each relative to B(B0→D-Ds+). The ratios of branching fractions are B(B̅ s0→D+D-)/B(B̅ 0→D+D-)=1.08±0.20±0.10, B(B̅ s0→Ds+D-)/B(B0→D-Ds+)=0.050±0.008±0.004, B(B̅ s0→D0D̅ 0)/B(B-→D0Ds-)=0.019±0.003±0.003, B(B̅ 0→D0D̅ 0)/B(B-→D0Ds-)<0.0024 at 90% CL, B(B̅ s0→Ds+Ds-)/B(B0→D-Ds+)=0.56±0.03±0.04, B(B-→D0Ds-)/B(B0→D-Ds+)=1.22±0.02±0.07, where the uncertainties are statistical and systematic, respectively.

First observations of B[over ¯]_{s}^{0}→D^{+}D^{-}, D_{s}^{+}D^{-} and D^{0}D[over ¯]^{0} decays

AURIEMMA, Giulio;SATRIANO, Celestina;
2013-01-01

Abstract

First observations and measurements of the branching fractions of the B̅ s0→D+D-, B̅ s0→Ds+D- and B̅ s0→D0D̅ 0 decays are presented using 1.0  fb-1 of data collected by the LHCb experiment. These branching fractions are normalized to those of B̅ 0→D+D-, B0→D-Ds+ and B-→D0Ds-, respectively. An excess of events consistent with the decay B̅ 0→D0D̅ 0 is also seen, and its branching fraction is measured relative to that of B-→D0Ds-. Improved measurements of the branching fractions B(B̅ s0→Ds+Ds-) and B(B-→D0Ds-) are reported, each relative to B(B0→D-Ds+). The ratios of branching fractions are B(B̅ s0→D+D-)/B(B̅ 0→D+D-)=1.08±0.20±0.10, B(B̅ s0→Ds+D-)/B(B0→D-Ds+)=0.050±0.008±0.004, B(B̅ s0→D0D̅ 0)/B(B-→D0Ds-)=0.019±0.003±0.003, B(B̅ 0→D0D̅ 0)/B(B-→D0Ds-)<0.0024 at 90% CL, B(B̅ s0→Ds+Ds-)/B(B0→D-Ds+)=0.56±0.03±0.04, B(B-→D0Ds-)/B(B0→D-Ds+)=1.22±0.02±0.07, where the uncertainties are statistical and systematic, respectively.
2013
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/11563/59433
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 21
social impact