1,721,035 research outputs found
Planck scale kinematics and the Pierre Auger observatory
No full textQuite unexpectedly, to many of us at least, Planck scale physics has in
last years made irruption in present experimental physics. In these lectures I try to
describe why this happened particularly in relation to Ultra High Energy Cosmic
Ray Physics, and will discuss the potentialities of experiments in this field, in particular
of the Pierre Auger Observatory. I will also present some (more theoretical)
speculations
Particle-Dependent Deformations of Lorentz Symmetry
No full textI report results suggesting that it is possible to introduce laws of relativistic kinematics endowing different types of particles with suitably different deformed-Lorentz-symmetry properties. I also consider some possible applications of these results, among which I highlight those relevant for addressing a long-standing challenge in the description of composite particles, such as atoms, within quantum-gravity-inspired scenarios with Planck-scale deformations of Lorentz symmetry. Some of the new elements here introduced in the formulation of relativistic kinematics appear to also provide the starting point for the development of a correspondingly novel mathematical formulation of spacetime-symmetry algebras
SOME ENCOURAGING AND SOME CAUTIONARY REMARKS ON DOUBLY SPECIAL RELATIVITY IN QUANTUM GRAVITY
No full textTHE THREE PERSPECTIVES ON THE QUANTUM-GRAVITY PROBLEM AND THEIR IMPLICATIONS FOR THE FATE OF LORENTZ SYMMETRY
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