[en] Recent measurements in the charm sector at BABAR are reviewed. The scope of the presentation includes the observation of two new narrow mesons in the D_s⁺π⁰ and D_s⁺π⁰γ final states as well as the measurement of D⁰-(bar D)⁰ mixing parameters by means of two methods: using the doubly-Cabibbo-suppressed D⁰ decay to K⁺π^- and using the ratios of lifetimes extracted from samples of D⁰ mesons decaying to K^- π⁺, K^-K⁺, and π^-π⁺

[en] The authors report 7 cases of mucoceles of the paranasal sinues evaluated with plain films and CT. All patients were submitted to surgery. Five patients were affected with frontal mucoceles and 4 with sphenoid ones. In 2 cases the lesion was double. Symptoms were correlated with both site and compressive changes due to expansile growth. All cases were evaluated by means of axial and coronal pre- and post-contrast scans: a satisfactory morphological depiction of the lesion was always achieved. CT values were also calculated, and the relationship of mucocele to the adjacent structures was demonstrated. The modalities of expansile growth, the lack of enhancement in post-contrast scans, and the possible 'ring sign' in cases with intracranial spread allow a correct radiological diagnosis. CT is the diagnostic method of choice for best lesion demonstration: it makes a correct diagnosis possible and allows the thorough evaluation of the involved structures for surgical planning

[en] In order to test the computing capabilities of GPUs with respect to traditional CPU cores a high-statistics toy Monte Carlo technique has been implemented both in ROOT/RooFit and GooFit frameworks with the purpose to estimate the statistical significance of the structure observed by CMS close to the kinematical boundary of the J/ψφ invariant mass in the three-body decay B⁺ → J/ψφK⁺. GooFit is a data analysis open tool under development that interfaces ROOT/RooFit to CUDA platform on nVidia GPU. The optimized GooFit application running on GPUs hosted by servers in the Bari Tier2 provides striking speed-up performances with respect to the RooFit application parallelized on multiple CPUs by means of PROOF-Lite tool. The considerable resulting speed-up, evident when comparing concurrent GooFit processes allowed by CUDA Multi Process Service and a RooFit/PROOF-Lite process with multiple CPU workers, is presented and discussed in detail. By means of GooFit it has also been possible to explore the behaviour of a likelihood ratio test statistic in different situations in which the Wilks Theorem may or may not apply because its regularity conditions are not satisfied. (authors)

[en] A very general local realistic theory of single B⁰_d mesons and of correlated B⁰_dB⁰_d pairs is formulated. If these pairs are produced in Υ(4S) decay, the local realistic asymmetry for observing pairs with like and unlike flavour at different proper times remarkably differs from the quantum mechanical prediction. Asymmetric B factories provide a powerful tool for the study of the EPR problem since the relative detection experiments can be shown to be capable of a time-dependent measurement precise enough to discriminate between local realism and quantum theory. (orig.)

[en] Solid-State-Drives are currently introduced in storage facilities for High Energy Physics (HEP) experiments and their performances are measured and compared to standard magnetic disks. For this paper a typical HEP data analysis is performed and used as a test to measure computing performances. The tests exploit the features provided by PROOF-Lite which allows to distribute a huge number of events among different CPU cores, thus reducing the overall time needed to complete the analysis task. These tests are carried on few computational devices typically hosted at a current Tier-2/Tier-3 facility. The performance results are provided in terms of figures of merit and the main issue is scalability described in terms of speed up factor and processing event rate. The obtained results can be used as guideline for both the typical HEP analyst and the Tier-2/Tier-3 manager: the former in the configuration of his own analysis task while dealing with increasing data sizes, the latter in the implementation of an interactive data analysis facility for HEP experiments while facing solutions that concern both technological and economical aspects.

[en] We measure the branching ratios of the Cabibbo-suppressed decays Λ_c⁺ → Λ K⁺ and Λ_c⁺ → Σ⁰ K⁺ relative to the Cabibbo-favored decay modes Λ_c⁺ → Λ π⁺ and Λ_c⁺ and Λ_c⁺ → Σ⁰ π⁺ to be 0.044 ± 0.004 (stat.) ± 0.003 (syst.) and 0.039 ± 0.005 (stat.) ± 0.003 (syst.), respectively. We set an upper limit on the branching ratio at 90% confidence level for Λ_c⁺ → Λ K⁺π⁺π^- to be 4.1 x 10^-2 relative to Λ_c⁺ → Λ π⁺ and for Λ_c⁺ → Σ⁰ K⁺π⁺π^- to be 2.0 x 10^-2 relative to Λ_c⁺ We also measure the branching fraction for the Cabibbo-favored mode Λ_c⁺ → Σ⁰ π⁺ relative to Λ_c⁺ → Λπ⁺ to be 0.977 ± 0.015 (stat.) ± 0.051 (syst.). This analysis was performed using a data sample with an integrated luminosity of 125 fb^-1 collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC

No abstract available

[en] We present preliminary results from a lepton-tagged fully-inclusive measurement of B → X_sγ decays, where X_s is any strange hadronic state. Results are based on a BABAR data set of 88.5 million B(bar B) pairs at the Υ(4S) resonance. We present a reconstructed photon energy spectrum in the Υ(4S) frame, and partial branching fractions above minimum reconstructed photon energies of 1.9, 2.0, 2.1 and 2.2 GeV. We then convert these to measurements of partial branching fractions and truncated first and second moments of the true photon energy distribution in the B rest frame, above the same minimum photon energy values. The full correlation matrices between the first and second moments are included to allow fitting to any parameterized theoretical calculation. We also measure the direct CP asymmetry Α_CP(B → X_s+dγ) (based on the charge of the tagging lepton) above a reconstructed photon energy of 2.2 GeV

[en] We report on searches for B^- → D_s^- φ and B^- → D*_s^- φ. In the context of the Standard Model, these decays are expected to be highly suppressed since they proceed through annihilation of the b and (bar u) quarks in the B^- meson. Our results are based on 234 million Υ(4S) → B(bar B) decays collected with the BABAR detector at SLAC. We find no evidence for these decays, and we set Bayesian 90% confidence level upper limits on the branching fractions Β(B^- → D_s^-φ) < 1.9 x 10^-6 and Β(B^- → D*_s^- φ) < 1.2 x 10^-5. These results are consistent with Standard Model expectations

[en] The authors present a preliminary measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K_S⁰π⁰π⁰, with K_S⁰ → π⁺π^- and π⁰ → γγ. They use a sample of approximately 227 million B-meson pairs recorded at the Υ(4S) resonance by the BABAR detector at the PEP-II B-Factory at SLAC. From a maximum likelihood fit they extract the mixing-induced CP-violation parameter S_K#sub S#_#sup 0#_π#sup 0#_π#sup 0# = 0.84 ± 0.71(stat) ± 0.08(syst) and the direct CP-violation parameter C_K#sub S#_#sup 0π#⁰π⁰ = 0.27 ± 0.52(stat) ± 0.13(syst), where the first uncertainty is statistical and the second systematic