PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Astroparticle Physics and Gravitational Waves
Bounds on Plack-scale deformation of CPT from lifetimes and interference
W. Wislicki
Full text: Not available
Abstract
Deformed relativistic kinematics, expected to emerge in a flat-spacetime limit of quantum grav-
ity, predicts violation of discrete symmetries at energy scale in the vicinity of the Planck mass.
Momentum-dependent deformations of the C, P and T invariance are derived from the κ-deformed
Poincaré algebra. Deformation of the CPT symmetry leads to a subtle violation of Lorentz sym-
metry. This entails some small but measurable phenomenological consequences, as corrections
to characteristics of time evolution: particle lifetimes or frequency of flavour oscillations in two-
particle states at high energy. We argue here that using current experimental precisions on the
muon lifetime one can bound the deformation parameter κ > 10 14 GeV at LHC energy and move
this limit even to 10 16 GeV at Future Circular Collider, planned at CERN. Weaker limits on de-
formation can be also obtained from interference of neutral mesons. In case of B 0 s from Υ decay
it amounts to κ > 10 8 GeV at confidence level 99%.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.