Comment on "A Lagrangian for DSR Particle and the Role of Noncommutativity"

Details Comment on "A Lagrangian for DSR Particle and the Role of Noncommutativity" Comment on "A Lagrangian for DSR Particle and the Role of Noncommutativity"

2007-10-19

arxiv.org/abs/0710.3724v2

Physics

High Energy Physics

High Energy Physics - Theory

2 pages, no figures, short and reviewed version of the work presented at ENFPC, \'Aguas de Lind\'oia, Brazil, september, 2007

Scientific paper

In this work, we comment on two special points in the paper by S. Ghosh [Phys. Rev. D 74, 084019 (2006)]. First of all, the Lagrangian presented by the author does not describe the Magueijo- Smolin model of Doubly Special Relativity since it is equivalent to the Lagrangian of the standard free relativistic particle. We also show that the introduction of noncommutative structures is not relevant to the problem of Lorentz covariance in Ghosh formalism.

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