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Accueil du site > Publications récentes

Publications récentes


Time-of-flight secondary ion mass spectrometry imaging of biological samples with delayed extraction for high mass and high spatial resolutions

Quentin P. Vanbellingen, Nicolas Elie, Michael J. Eller, Serge Della-Negra, David Touboul, Alain Brunelle

Abstract Rationale In Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS), pulsed and focused primary ion beams enable mass spectrometry imaging, a method which is particularly useful to map various small molecules such as lipids at the surface of biological samples. When using TOF-SIMS instruments, the focusing modes of the primary ion beam delivered by liquid metal ion guns can provide either a mass resolution of several thousand or a sub-µm lateral resolution, but the (...)

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Feasibility study for the measurement of πN transition distribution amplitudes at ¯PANDA in ¯pp→J/ψπ0

B. Singh et al. (PANDA collaboration)

Abstract The exclusive charmonium production process in ¯pp annihilation with an associated π0 meson ¯pp→J/ψπ0 is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the J/ψ→e+e− decay channel with the AntiProton ANnihilation at DArmstadt (¯PANDA) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the ¯pp→π+π−π0 and ¯pp→J/ψπ0π0 reactions are performed (...)

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Inclusive Λ production in proton-proton collisions at 3.5 GeV

J. Adamczewski-Musch et al. (HADES Collaboration)

The inclusive production of Λ hyperons in proton-proton collisions at √s=3.18GeV was measured with HADES at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. The experimental data are compared to a data-based model for individual exclusive Λ production channels in the same reaction. The contributions of intermediate resonances such as Σ(1385), Δ++, or N∗ are considered in detail. In particular, the result of a partial-wave analysis accounts for the abundant pK+Λ final state. (...)

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Combining symmetry breaking and restoration with configuration interaction : A highly accurate many-body scheme applied to the pairing Hamiltonian

J. Ripoche, D. Lacroix, D. Gambacurta, J.-P. Ebran, and T. Duguet

Background : Ab initio many-body methods have been developed over the past ten years to address mid-mass nuclei. In their best current level of implementation, their accuracy is of the order of a few percent error on the ground-state correlation energy. Recently implemented variants of these methods are operating a breakthrough in the description of medium-mass open-shell nuclei at a polynomial computational cost while (...)

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Tomographic image of the proton

R. Dupré, M. Guidal, and M. Vanderhaeghen

We have carried out a phenomenological analysis of the latest deep virtual Compton scattering experimental data based on the generalized parton distribution formalism. This allows us to extract the dependence of the spatial size of the proton on the quark’s longitudinal momentum. This results in the first continuous two-dimensional momentum-space image and tomography of the proton based on experimental (...)

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