61 citations · 200 across the 12 of their papers we have counts for
12 papers
Normal and anomalous diffusion in a bouncing ball over an irregular surface
Ana Laura Boscolo, Valdir Barbosa da Silva Junior, Luiz Antonio Barreiro
The problem of a bouncing ball on a non-planar surface is investigated. We discovered that surface undulation adds a horizontal component to the impact force, which acquires a rand…
The origin of the KLT relations and nonlinear relations for Yang-Mills amplitudes
Luiz Antonio Barreiro, Ricardo Medina
By means of a kinematic analysis of tree level graviton amplitudes we find, at least through six points, that the reason of their decompositon as a sum over products of Yang-Mills…
Thermodynamics of a time dependent and dissipative oval billiard: a heat transfer and billiard approach
Edson D. Leonel, Marcus Vinicius Camillo Galia, Luiz Antonio Barreiro +1
We study some statistical properties for the behavior of the average squared velocity -- hence the temperature -- for an ensemble of classical particles moving in a billiard whose…
RNS derivation of N-point disk amplitudes from the revisited S-matrix approach
Luiz Antonio Barreiro, Ricardo Medina
In the past year, in arXiv:1208.6066 we proposed a revisited S-matrix approach to efficiently find the bosonic terms of the open superstring low energy effective lagrangian (OSLEEL…
Revisiting the S-matrix approach to the open superstring low energy effective lagrangian
Luiz Antonio Barreiro, Ricardo Medina
The conventional S-matrix approach to the (tree level) open string low energy effective lagrangian assumes that, in order to obtain all its bosonic order terms, it is nece…
Higher N-point Amplitudes in Open Superstring Theory
L. A. Barreiro, R. Medina
In this work we report on recent progress in the calculation of open superstring scattering amplitudes, at tree level, with more than four external massless states. We also report…