9/11/2017, Aula A del Dipartimento di Fisica, ore 16:30. Relatore: X. Artru, CNRS/IN2P3 and Université Lyon-1
- Data: 9/11/2017
- Ora: 16:30
- Luogo: Aula A Dipartimento di Fisica
Abstract:
The spin observables of a polarized reaction obey spin inequalities translating the positivity of the cross section matrix, which is the density matrix of a state gathering all the polarized particles (initial and final ones).
This « quantum positivity » is more severe than the mere « classical positivity » of the cross section. We give their physical meaning in terms of separable or entangled states and compare their respective domains in the space of observables.
In a second part, we recall the Knowless-Collins rules for Monte-Carlo generation of polarized and entangled cascades and tell how to apply them in the recursive jet model and in e+e- annihilation into hadrons.