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The emergence of a universal limiting speed · Around

2011

The emergence of a universal limiting speed

Anber, Mohamed M., Donoghue, John F.

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We display several examples of how fields with different limiting velocities (the "speed of light") at a high energy scale can nevertheless have a common limiting velocity at low energies due to the effects of interactions.

We evaluate the interplay of the velocities through the self-energy diagrams and use the renormalization group to evolve the system to low energy.
The differences normally vanish only logarithmically, so that an exponentially large energy trajectory is required in order to satisfy experimental constraints.
However, we also display a model in which the running is power-law, which could be more phenomenologically useful.

Built on

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