[en] Motivated by the polarization anomaly in the B → φ(1020)K*(892) decay, they extend their search for other K* final states in the decay B⁰ → φ(1020)K*⁰ with the K*⁰ → K⁺π^- invariant mass above 1.6 GeV. The final states considered include the K*(1680)⁰, K*₃(1780)⁰, K*₄(2045)⁰, and a Kπ spin-zero nonresonant component. They also search for B⁰ → φ((bar D)⁰) decay with the same final state. The analysis is based on a sample of about 384 million B(bar B) pairs recorded with the BABAR detector. They place upper limits on the branching fractions Β(B⁰ → φK*(1680)⁰) < 3.5 x 10^-6, Β(B⁰ → φK*₃(1780)⁰) < 2.7 x 10^-6, Β(B⁰ → φK*₄(2045)⁰) < 15.3 x 10^-6, and Β(B⁰ → φ(bar D)⁰) < 11.7 x 10^-6 at 90% C.L. The nonresonant contribution is consistent with the measurements in the lower invariant mass range

[en] Using 383x10⁶ BB pairs from the BABAR data sample, we report results for branching fractions of six charged B-meson decay modes, where a charged kaon recoils against a charmless resonance decaying to KK* or ηππ final states with mass in the range (1.2-1.8) GeV/c². We observe a significant enhancement at the low KK* invariant mass which is interpreted as B⁺→η(1475)K⁺, find evidence for the decay B⁺→η(1295)K⁺, and place upper limits on the decays B⁺→η(1405)K⁺, B⁺→f₁(1285)K⁺, B⁺→f₁(1420)K⁺, and B⁺→φ(1680)K⁺

[en] The authors discuss about the nature of f₀(400-1200) which authors decompose into three parts, i.e., t-channel ρ meson and f₂(1270) meson exchange plus an additional s-channel resonance f₀(X). Below 1.2 GeV of ππ invariant mass, t-channel ρ meson exchange can explain the I = 2 ππ S-wave scattering very well. However, the f₂(1270) meson exchange must be considered for the ππ invariant mass above 1.2 GeV. With the t-channel ρ meson and f₂(1270) meson exchange fixed by the iso-tensor ππ→ ππ S-wave scattering, the authors re-fit the CERN-Muelich (CM) data on ππ scattering to get parameters for the f₀(X). The authors find that it is necessary to introduce a broad 0⁺⁺ resonance with a pole about 1.6 - 1.7 GeV

[en] We present a study of the decay B^- --> D^*0K^*- based on a sample of 86 X 10⁶ Υ (4S) --> B barΒ decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the branching fraction Β(B^- --> D^*0K^*-) = (8.3+-1.1(stat)+- 1.0(syst)) X 10^-4, and the fraction of longitudinal polarization in this decay to be Γ_L/Γ = 0.86+-0.06(stat)+-0.03(syst)

[en] It has been argued that the mystery boson X(3872) is a molecular state consisting of primarily D⁰(bar D)*⁰ + (bar D)⁰D*⁰. In contrast, apparent puzzles and potential difficulties have been pointed out for the charmonium assignment of X(3872). They examine several aspects of these alternatives by semi-quantitative methods since quantitatively accurate results are often hard to reach on them. they point out that some of the observed properties of X(3872), in particular, the binding and the production rates are incompatible with the molecule interpretation. Despite puzzles and obstacles, X(3872) may fit more likely to the excited ³P₁ charmonium than to the molecule after the mixing of c(bar c) with D(bar D)* + (bar D)D* is taken into account

[en] The authors present a search for B decays to charmless final states involving charged or neutral a₀ mesons. The data sample corresponds to 89 million B(bar B) pairs collected with the BABAR detector operating at the PEP-II asymmetric-energy B Factory at SLAC. They find no significant signals and determine the following 90% C.L. upper limits: Β(B⁰ → a₀^- π⁺) < 5.1 x 10^-6, Β(B⁰ → a₀^-K⁺) < 2.1 x 10^-6 Β(B^- → a₀⁰(bar K)⁰) < 3.9 x 10^-6, Β(B⁺ → a₀⁰π⁺) < 5.8 x 10^-6, Β(B⁺ → a₀⁰K⁺) < 2.5 x 10^-6, and Β(B⁰ → a₀⁰K⁰) < 7.8 x 10^-6, where in all cases Β indicates the product of branching fractions for B → a₀X and a₀ → ηπ, where X indicates K or π

[en] The BABAR experiment has been taking data since about one year. Physics results, complementary to those described in [1], are presented: various measurements of the neutral and charged B mesons lifetimes, the B₀ mixing frequency, the mistag fractions, and the B → D_s^(*)X and B⁰ → D_s^(*)+ D^*- branching ratios. Some prospects for the close future are shown. All the numbers given here are preliminary

[en] We present a measurement of time-dependent CP asymmetries and an updated determination of the CP-odd fraction in the decay B⁰ → D*⁺ D*^-. The measurements are derived from a data sample of 88 x 10⁶ B(bar B) pairs collected by the BABAR detector at the PEP-II energy asymmetric B Factory at SLAC. All results are preliminary

[en] The BaBar Collaboration has recently reported the observation of the decay mode B^-→D_s⁺K^-π^-. We investigate the role played by the D** resonances in this decay mode using HQET. Although these resonances cannot appear as physical intermediate states in this reaction, their mass is very close to the D_s⁺K^- production threshold and may, therefore, play a prominent role. We pursue this possibility to extract information on the properties of the strong D**DM couplings. As a byproduct of this analysis we point out that future super-B factories may be able to measure the D₀⁰D*γ radiative coupling through the reaction B^-→D*γπ^-

[en] Using the CLEO-II data set we have searched for the Cabibbo-suppressed decays B⁰ → D*⁺D*^-. For the decay B⁰ → D*⁺D*^-, we observe one candidate signal event, with an expected background of 0.022 ± 0.011 events. This yield corresponds to a branching fraction of Β(B⁰ → D*⁺D*^-) = (5.3_-3.7^+7.1(stat) ± 1.0(syst)) x 10^-4 and an upper limit of Β(B⁰ → D*⁺D^-) < 2.2 x 10^-3 at the 90% CL. For B⁰ → D*^±D^± and B⁰ → D⁺D^-, no significant excess of signal above the expected background level is seen, and we calculate the 90% CL upper limits on the branching fractions to be Β(B⁰ → D*^±D^±) < 1.8 x 10^-3 and B(B⁰ → D⁺D^-) < 1.2 x 10^-3