# The Soccer-Ball Problem

@article{Hossenfelder2014TheSP, title={The Soccer-Ball Problem}, author={Sabine Hossenfelder}, journal={Symmetry Integrability and Geometry-methods and Applications}, year={2014}, volume={10}, pages={074} }

The idea that Lorentz-symmetry in momentum space could be modified but still remain observer-independent has received quite some attention in the recent years. This modified Lorentz-symmetry, which has been argued to arise in Loop Quantum Gravity, is being used as a phenomenological model to test possibly observable effects of quantum gravity. The most pressing problem in these models is the treatment of multi-particle states, known as the 'soccer-ball problem'. This article briefly reviews the…

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