title: Taming nonlocality in theories with Planck-scale deformed Lorentz symmetry.
abstract: We report a general analysis of worldlines for theories with deformed relativistic symmetries and momentum dependence of the speed of photons. Our formalization is faithful to Einstein's program, with spacetime points viewed as an abstraction of physical events. The emerging picture imposes the renunciation of the idealization of absolutely coincident events, but is free from some pathologies which had been previously conjectured.
authors.affiliation: Dipartimento di Fisica, Università di Roma "La Sapienza", EU.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Amelino-Camelia
authors.forename: Marco
authors.initials: M
authors.lastname: Matassa
authors.forename: Flavio
authors.initials: F
authors.lastname: Mercati
authors.forename: Giacomo
authors.initials: G
authors.lastname: Rosati