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Experimental evidence of left-handed transmission is demonstrated through an array of ferromagnetic microwires. We used amorphous magnetic microwires to take advantage of both electric and magnetic responses locally generating a double negative medium at microwave frequencies, where the ferromagnetic resonance effects take place. The dilution of the… (More)

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

- J. Carbonell, A. Díaz-Rubio, +4 authors J. Sánchez-Dehesa
- Scientific reports
- 2012

Based on the concepts of artificially microstructured materials, i.e. metamaterials, we present here the first practical realization of a radial wave crystal. This type of device was introduced as a theoretical proposal in the field of acoustics, and can be briefly defined as a structured medium with radial symmetry, where the constitutive parameters are… (More)

- J Carbonell, V A Karmanov
- 2008

For the zero-range interaction providing a given mass M 2 of the two-body bound state, the mass M 3 of the relativistic three-boson state is calculated. We have found that the three-body system exists only when M 2 is greater than a critical value M c ≈ 1.43 m (m is the constituent mass). For M 2 = M c the mass M 3 turns into zero and for M 2 < M c there is… (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)

- J Carbonell, M Mangin-Brinet
- 2001

Some of the last results on low energy antiproton physics are reviewed. First Faddeev calculations for ¯ nd scattering length are presented.

- V A Karmanov, J Carbonell
- 2005

We develop a new method of solving Bethe-Salpeter (BS) equation for spinless particles. It is based on projecting the BS equation on the light-front (LF) plane and on the Nakanishi integral representation of the BS amplitude. The method is valid for any kernel given by the irreducible Feynman graphs and does not assume a transformation to the Euclidean… (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)

- 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, M Mangin-Brinet
- 2008

For a relativistic system of two scalar particles, we find the Bethe-Salpeter amplitude in Minkowski space and use it to compute the electromagnetic form factor. The comparison with Euclidean space calculation shows that the Wick rotation in the form factor integral induces errors which increase with the momentum transfer Q 2. At JLab domain (Q 2 = 10 GeV 2… (More)