Strongest Atomic Physics Bounds on Noncommutative Quantum Gravity Models
Kristian Piscicchia, Andrea Addazi, Antonino Marcianò, M. Bazzi, M. Cargnelli, A. Clozza, Luca De Paolis, R. Del Grande, C. Guaraldo, Mihail Antoniu Iliescu, M. Laubenstein, J. Márton, Marco Miliucci, F. Napolitano, Alessio Porcelli, A. Scordo, Diana Laura Sirghi, F. Sirghi, O. Vázquez Doce, J. Zmeskal, C. Curceanu
Abstract
Investigations of possible violations of the Pauli exclusion principle represent critical tests of the microscopic space-time structure and properties. Space-time noncommutativity provides a class of universality for several quantum gravity models. In this context the VIP-2 lead experiment sets the strongest bounds, searching for the Pauli exclusion principle violating atomic transitions in lead, excluding the $\ensuremath{\theta}$-Poincar\'e noncommutative quantum gravity models far above the Planck scale for nonvanishing ${\ensuremath{\theta}}_{\ensuremath{\mu}\ensuremath{\nu}}$ electriclike components, and up to $6.9\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$ Planck scales if ${\ensuremath{\theta}}_{0i}=0$.