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IGLEX: end of construction site

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The IGLEX was decided between the two laboratories, IPNO and LAL, within the framework of the valley plan in 2012. The aim was to create a multidisciplinary centre with the two EQUIPEX ANDROMEDE and THOMX teams carried by these two laboratories. This centre is located in building 209 (named (...)

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A new record for the spoke superconducting cavities for the European Spallation Source (ESS)

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In the framework of the French contribution to the construction of ESS, the future European neutron spallation source, IPN Orsay is in charge in particular of the design and construction of the intermediate energy section (90 to 220 MeV) of the proton accelerator. This section is based on (...)

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Scientific news

ALTO reveals shape coexistence close to 78Ni

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The observation of a deformed ground state in 32Mg (N = 20) and the existence of shape coexistence in 44S (N = 28), nuclei with magic numbers of neutrons and thus expected spherical, has deeply revolutionized the understanding of the structure of neutron-rich nuclei. It highlights the (...)

A. Gottardo, D. Verney, C. Delafosse, F. Ibrahim, B. Roussière, C. Sotty, S. Roccia, C. Andreoiu, C. Costache, M.-C. Delattre, I. Deloncle, A. Etilé, S. Franchoo, C. Gaulard, J. Guillot, M. Lebois, M. MacCormick, N. Marginean, R. Marginean, I. Matea, C. Mihai, I. Mitu, L. Olivier, C. Portail, L. Qi, L. Stan, D. Testov, J. Wilson, and D. T. Yordanov

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Publications

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

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 (...)

B. Singh et al. (PANDA collaboration)

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Inclusive Λ production in proton-proton collisions at 3.5 GeV

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. (...)

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

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

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 (...)

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

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Tomographic image of the proton

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 (...)

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

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Chiral potential renormalized in harmonic-oscillator space

We renormalize the chiral effective field theory potential in harmonic-oscillator (HO) model space. The low energy constants (LECs) are utilized to absorb not just the ultraviolet part of the physics due to the cutoff, but also the infrared part due to the truncation of model space. We use the inverse J-matrix method to reproduce the nucleon-nucleon scattering phase shifts in the given model space. We demonstrate that by including the NLO correction, the nucleon-nucleon scattering in (...)

C.-J. Yang

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Rosenbluth Separation of the Pi 0 Electroproduction Cross Section

We present deeply virtual π0 electroproduction cross-section measurements at xB=0.36 and three different Q2 values ranging from 1.5 to 2  GeV2, obtained from Jefferson Lab Hall A experiment E07-007. The Rosenbluth technique is used to separate the longitudinal and transverse responses. Results demonstrate that the cross section is dominated by its transverse component and, thus, is far from the asymptotic limit predicted by perturbative quantum chromodynamics. Nonetheless, an indication (...)

M. Defurne et al. (Jefferson Lab Hall A Collaboration)

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Density-functional theory for resonantly interacting fermions with effective range and neutron matter

A density-functional theory is proposed for strongly interacting fermions with arbitrary large negative scattering length. The functional has only two parameters that are directly fixed to reproduce the universal properties of unitary gas : the so-called Bertsch parameter ξ0 and a parameter ηe related to the possible influence of the effective range re at infinite scattering length a. Using most recent quantum Monte Carlo (QMC) estimates of (...)

Denis Lacroix

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60 ans IPN Orsay/LAL

To be noted

ALTO Program Advisory Committee

from 6th to 7th of March, 2017 - IPN Orsay

Dead-line : 3rd of February The next meeting of the ALTO Program Advisory Committee will (...)


Seminars

The Linde problem on R 2 x S 1x S1

Daniel Kroff

IFT-Unesp, Sao Paulo

le 28/02/2017 à 11:00

Ecole Polytechnique, CPHT, Salle des Conférences

Progress on the description of low energy fission dynamics within the TDGCM+GOA

David Regnier

IPN, Orsay

le 06/03/2017 à 14:00

IPN Orsay - salle des conseils, Bâtiment 100M


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Works & Phd

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IPN

Institut de Physique Nucléaire Orsay - 15 rue Georges CLEMENCEAU - 91406 ORSAY (FRANCE)
UMR 8608 - CNRS/IN2P3

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