scholarly journals Measurement of branching fraction ratios and CP asymmetries in B →D0 CPK decays with the BABAR detector

2005 ◽  
Author(s):  
Giovanni Marchiori
Keyword(s):  
Branching Fraction ◽  
Babar Detector ◽  
Cp Asymmetries

A SEARCH FOR THE DECAY B+ → τ+ντ AT BABAR

2005 ◽  
Vol 20 (16) ◽  
pp. 3695-3697
Author(s):  
◽  
MOUSUMI DATTA
Keyword(s):  
Confidence Level ◽  
Branching Fraction ◽  
Upper Limit ◽  
B Factory ◽  
Babar Detector

We present a search for the decay B+ → τ+ντ in [Formula: see text] decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay [Formula: see text] is selected, and in the recoil a search for B+ → τ+ ντ signal is performed. The τ is identified in the following channels: [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text]. We find no evidence of signal, and we set a preliminary upper limit on the branching fraction of [Formula: see text] at the 90% confidence level (CL). This result is then combined with a statistically independent BABAR search for B+ → τ+ντ to give a combined preliminary limit of [Formula: see text] at 90% CL.

Partial Reconstruction of $B^0 \to D_s^{*+}D^{*-}$ Decays and Measurement of the $D_s^+ \to \phi\pi^+$ Branching Fraction

2005 ◽  
Vol 20 (16) ◽  
pp. 3712-3715
Author(s):  
Silvia Pennazzi
Keyword(s):  
Branching Fraction ◽  
Branching Fractions ◽  
Reconstruction Technique ◽  
Preliminary Results ◽  
Partial Reconstruction ◽  
Full Reconstruction ◽  
B Factory ◽  
Babar Detector

We present preliminary results on the branching fractions [Formula: see text] and [Formula: see text], based on a data sample of approximately [Formula: see text] events collected by the BABAR detector at the PEP-II e+e-B–factory. We reconstruct B0 mesons using both a partial and a full reconstruction technique. We obtain the following preliminary results: [Formula: see text] where the first error in each measurement is statistical, the second systematic.

scholarly journals B DECAYS TO FINAL STATES INCLUDING $D^{(*)}_s$ AND D*

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 440-443 ◽  
Author(s):  
◽  
BENJAMIN BRAU
Keyword(s):  
Branching Fraction ◽  
Branching Fractions ◽  
Reconstruction Technique ◽  
Final States ◽  
B Decays ◽  
Partial Reconstruction ◽  
Momentum Spectra ◽  
Babar Detector

The e+e- annihilation data recorded with the BABAR detector has been used to study B decays to [Formula: see text] and D*± mesons. The production fraction of inclusive [Formula: see text] and the corresponding momentum spectra have been determined. Exclusive decays [Formula: see text] have been identified with a partial reconstruction technique and their branching fractions have been measured. We also report branching fraction measurements for the exclusive hadronic modes B0 → D*- π+ and B0 → D*- ρ+.

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