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- Mariane Mangin-Brinet, Jaume Carbonell
- 2008

We study relativistic effects in a system of two scalar particles interacting via a scalar exchange in the Light Front Dynamcis framework. The results are compared to those provided by Bethe-Salpeter and non relativistic equations. It is found in particular that for massive exchange, the relativistic description is of crucial importance even in the limit of… (More)

- J. Carbonell, L.J. Rogla, V.E. Boria, D. Lippens
- IEEE Transactions on Microwave Theory and…
- 2006

Experimental results for the demonstration of backward-wave or double-negative (DNG) propagation in waveguide technology combining inductive windows and split-ring resonators are presented and discussed in depth. A novel segmented prototype has been designed, fabricated, and measured, thus allowing the analysis and discussion of different length structures.… (More)

- Remi Baron, Philippe Boucaud, +12 authors Urs Wenger
- Computer Physics Communications
- 2011

- Fuli Zhang, S. Potet, +4 authors D. Lippens
- IEEE Transactions on Microwave Theory and…
- 2008

Negative-zero-positive index refraction was demonstrated numerically on the basis of full-wave analysis of a microstructured omega-type array and experimentally via angle resolved transmission measurement of a prism-type prototype. The experimental results are interpreted in terms of characteristic impedance and refractive index retrieved by a Fresnel… (More)

- K Hagino, H Sagawa, J Carbonell, P Schuck
- Physical review letters
- 2007

We investigate the spatial structure of the two-neutron wave function in the Borromean nucleus (11)Li, using a three-body model of (9)Li + n + n, which includes many-body correlations stemming from the Pauli principle. The behavior of the neutron pair at different densities is simulated by calculating the two-neutron wave function at several distances… (More)

- Rémi Baron, Stefano Capitani, +4 authors Carsten Urbach
- 2007

We present our preliminary results on the lowest moment 〈x〉 of quark distribution functions of the pion using two flavor dynamical simulations with Wilson twisted mass fermions at maximal twist. The calculation is done in a range of pion masses from 300 to 500 MeV. A stochastic source method is used to reduce inversions in calculating propagators. Finite… (More)

- J Carbonell, V A Karmanov
- 2008

For the zero-range interaction providing a given mass M2 of the two-body bound state, the mass M3 of the relativistic three-boson state is calculated. We have found that the three-body system exists only when M2 is greater than a critical value Mc ≈ 1.43m (m is the constituent mass). For M2 = Mc the mass M3 turns into zero and for M2 < Mc there is no… (More)

- J. Carbonell
- 2008

Bethe-Salpeter (BS) equation in Minkowski space for scalar particles is solved for a kernel given by a sum of ladder and cross-ladder exchanges. The solution of corresponding Light-Front (LF) equation, where we add the time-ordered stretched boxes, is also obtained. Cross-ladder contributions are found to be very large and attractive, whereas the influence… (More)

- Constantia Alexandrou, Tomasz Korzec, +8 authors Carsten Urbach
- 2007

We present results on the mass of the nucleon and the ∆ using two dynamical degenerate twisted mass quarks. The evaluation is performed at four quark masses corresponding to a pion mass in the range of 690-300 MeV on lattices of size 2.1 fm and 2.7 fm. We check for cutoff effects by evaluating these baryon masses on lattices of spatial size 2.1 fm with… (More)

- V. A. Karmanov, J. Carbonell
- 1977

Light-front dynamics (LFD) is a powerful approach to the theory of relativistic composite systems (hadrons in the quark models and relativistic nucleons in nuclei). Its explicitly covariant version [1] has been recently applied with success [2] to describe the new CEBAF/TJNAF data on the deuteron electromagnetic form factors. The solutions used in [2] were… (More)