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Rosenbluth Separation of the Pi 0 Electroproduction Cross Section

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

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 (...)

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

Denis Lacroix

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 (...)

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Extraction of pure transfer probabilities from experimental transfer and capture data

G. Scamps, V. V. Sargsyan, G. G. Adamian, N. V. Antonenko, and D. Lacroix

A new method is suggested to extract pure transfer probabilities from the experimental data. For the Ca40+Zr96 reaction at sub-barrier energies, the one- and two-neutron transfer probabilities at backward angle are extracted from the experimental capture (fusion) and transfer excitation functions. The pure one- and two-neutron transfer probabilities are shown to be close at the (...)

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J/ψ suppression at forward rapidity in Pb-Pb collisions at √sNN=5.02 TeV

ALICE publications, CERN-EP-2016-162

The inclusive J/ψ production has been studied in Pn-Pb and pp collisions at the centre-of-mass energy per nucleon pair √sNN=5.02 TeV, using the ALICE detector at the CERN LHC. The J/ψ meson is reconstructed, in the centre-of-mass rapidity interval 2.5<y<4 and in the transverse-momentum range pT<12 GeV/c, via its decay to a muon pair. In this Letter, we present results on the inclusive J/ψ cross section in pp collisions at s√=5.02 TeV and on the nuclear modification factor RAA. The (...)

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Effective field theory for few-boson systems

Betzalel Bazak, Moti Eliyahu, and Ubirajara van Kolck

We study universal bosonic few-body systems within the framework of effective field theory at leading order (LO). We calculate binding energies of systems of up to six particles and the atom-dimer scattering length. Convergence to the limit of zero-range two- and three-body interactions is shown, indicating that no additional few-body interactions need to be introduced at LO. Generalizations of the Tjon line are constructed, showing correlations between few-body binding energies and the (...)

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