T-odd Observables in Elastic Scattering, in Deep Inelastic Processes and in Weak Decays

We give a unitary description of T-odd effects in various sectors of atomic, nuclear and particle physics, like elastic scattering, deep inelastic processes and weak decays. This we get thanks to a particular transformation, which leads us to defining two T-odd observables. This approach allows to revise in quite a natural way various azimuthal asymmetries and normal polarizations already predicted or even observed in deep inelastic processes and in weak decays. In the latter case, useful suggestions for phenomenological analyses and an interesting result for normal and transverse polarization are derived

Symmetry and Relativity : From Classical Mechanics to Modern Particle Physics

to be published in "Natural Science"International audienceThe aim of this review is to highlighte the common aspects between Symmetry in Physics and the Relativity Theory, particularly Special Relativity. After a brief historical introduction, emphasis is put on the physical foundations of Relativity Theory and its essential role in the clarification of many issues related to fundamental symmetries. Their different connections will be shown from Classical Mechanics to Modern Particle Physics

Searching for New Physics by means of Relative Phases and Moduli of Decay Amplitudes

We illustrate some tests which may shed light on physics beyond the Standard Model. Some of them are especially sensitive to possible signals of new physics.Comment: 16 page

Time Reversal Violation: Suggested Tests for Non-Leptonic Two-Body Decays

International audienceWe discuss a theoretical condition for time reversal violation in weak non-leptonic two-body decays involving spinning and unstable particles in the final state. In some cases this condition looks particularly simple and suitable for tests of time reversal violation

Resonances, polarizations and symmetries in Lambda_b decays

New and corrected version of the paper arXiv : hep-ph/0702240 submitted to phys. Lett. BRelativistic polarization offers very interesting opportunities to test fundamental symmetries like Time-Reversal (TR). Starting from simple scattering-matrix relations, supplemented by QCD-inspired models describing heavy quark decays, it is shown that the polarization-vectors of resonances coming from Lambda_b decays exhibit very clear possibilities of TR violatio

Erratum to: Polarization in (quasi-)two-body decays and new physics

A correction to this paper has been published: https://doi.org/10.1140/epjc/s10052-019-7506-