Details

Autor(en) / Beteiligte

• Polchinski, Joseph

Titel

Comment on 'Small Lorentz violations in quantum gravity: do they lead to unacceptably large effects?'

Ist Teil von

• Classical and quantum gravity, 2012-04, Vol.29 (8), p.88001

Ort / Verlag

IOP Publishing

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A recent paper by Gambini et al (2011 Class. Quantum Grav. 28 155005) investigates the important issue of constraints from Lorentz invariance on Planck scale physics, arguing that the classic analysis of Collins et al (2004 Phys. Rev. Lett. 93 191301) is not generally valid. We argue that the new work is based on models that do not capture the relevant physics and that almost all models of observable high-energy Lorentz violation, and proposed Lorentz-violating theories of quantum gravity, are ruled out by low-energy tests; the only known exceptions are based on supersymmetry.