scholarly journals Geant4-Based Simulation Study of PEP-II Beam Backgrounds in the Babar Detector at the SLAC B-Factory

2006 ◽  
Author(s):  
W.S. Lockman ◽  
W. Kozanecki ◽  
B. Campbell ◽  
S.H. Robertson ◽  
M. Bondioli ◽  
...  
Keyword(s):  
Simulation Study ◽  
B Factory ◽  
Babar Detector

scholarly journals Study of $B^- \to D^*_2(2460)^0 \pi^-$ and $B^- \to D_1(2420)^0 \pi^-$ Decays

2005 ◽  
Vol 20 (16) ◽  
pp. 3698-3700 ◽  
Author(s):  
◽  
Vance O. Eschenburg
Keyword(s):  
Heavy Quark ◽  
B Mesons ◽  
P Wave ◽  
Effective Theory ◽  
Heavy Quark Effective Theory ◽  
Preliminary Results ◽  
B Factory ◽  
Babar Detector

We report on a study of B mesons decaying into one of the narrow P -wave charm resonances, [Formula: see text] and D1(2420)0. Our preliminary results are based on 89 million [Formula: see text] pairs collected with the BABAR detector at the PEP-II asymmetric B Factory. Our study will be useful in the investigation of the properties of Heavy Quark Effective Theory.

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.

CP VIOLATION AT BABAR

2008 ◽  
Vol 23 (21) ◽  
pp. 3273-3276
Author(s):  
◽  
CHRISTOPHE YÈCHE
Keyword(s):  
Cp Violation ◽  
Unitarity Triangle ◽  
B Factory ◽  
Babar Detector

We report recent measurements of the three CKM angles of the Unitarity Triangle using about 383 millions [Formula: see text] pairs collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.

Measurement of CP-Violating Asymmetries in B0 → (ρπ)0 Using a Time-Dependent Dalitz Plot Analysis

2005 ◽  
Vol 20 (15) ◽  
pp. 3551-3553
Author(s):  
◽  
ATTILA MIHALYI
Keyword(s):  
Form Factor ◽  
Maximum Likelihood ◽  
Decay Rate ◽  
Bilinear Form ◽  
Dalitz Plot ◽  
Time Dependent ◽  
Preliminary Measurement ◽  
Plot Analysis ◽  
B Factory ◽  
Babar Detector

We present the preliminary measurement of CP-violating asymmetries in B0 → (ρπ)0 → π+π-π0 decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 213 million [Formula: see text] decays, collected by the BaBar detector at the PEPII asymmetric-energy B -Factory at SLAC. We measure 16 coefficients of the bilinear form factor terms occurring in the time-dependent decay rate of the B0 meson with the use of a maximum-likelihood fit. The physically relevant CP parameters are derived from these coefficients.

scholarly journals Constraints on the CKM angle α in the B → ρρ decays

2005 ◽  
Vol 20 (15) ◽  
pp. 3578-3580
Author(s):  
Haibo Li
Keyword(s):  
Decay Mode ◽  
Branching Fraction ◽  
Time Dependent ◽  
Penguin Contribution ◽  
Upper Limit ◽  
B Factory ◽  
Babar Detector ◽  
Asymmetry Parameters ◽  
Ckm Angle

Using a data sample of 122 million [Formula: see text] decays collected with BABAR detector at the PEP-II asymmetric B factory at SLAC, we measure the time-dependent-asymmetry parameters of the longitudinally polarized component in the B0 → ρ+ρ- decay as CL = -0.23 ± 0.24 ( stat ) ± 0.14 ( syst ) and SL = -0.19 ± 0.33 ( stat ) ± 0.11 ( syst ). The B0 → ρ0ρ0 decay mode is also searched for in a data sample of about 227 million [Formula: see text] pairs. No significant signal is observed, and an upper limit of 1.1 × 10-6 (90% C.L.) on the branching fraction is set. The penguin contribution to the CKM angle α uncertainty is measured to be 11°. All results are preliminary.

scholarly journals Radiative Penguin Decays of B Mesons: Measurements of B → K*γ, $B \to K^*_2(1430)\gamma$, and Search for B0 → ϕγ

2005 ◽  
Vol 20 (16) ◽  
pp. 3621-3623
Author(s):  
◽  
Johannes M. Bauer
Keyword(s):  
Standard Model ◽  
B Mesons ◽  
B Meson ◽  
Branching Fractions ◽  
Decay Rates ◽  
Isospin Asymmetry ◽  
Penguin Decays ◽  
B Factory ◽  
Babar Detector

Electromagnetic radiative penguin decays of the B meson were studied with the BABAR detector at SLAC's PEP-II asymmetric-energy B Factory. Branching fractions and isospin asymmetry of the decay B → K*γ, branching fractions of [Formula: see text], and a search for B0 → ϕγ are presented. The decay rates may be enhanced by contributions from non-standard model processes.

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