Séminaires

Odderon - mystery and reality
O.V. Selyugin (BLTPh, JINR, Dubna, Russia)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)

The talk is related to one of mainstream particle physics - the search for the odd-signature partner of the Pomeron - the Odderon, as it was named by B. Nicolescu. Now there is a wide discussion about the Odderon contribution in elastic hadron scattering (see e.g. CERN Courier n.4 april 2018). I will make a short review of the possible effects of the Odderon in the different reactions and attempt to find the Odderon contributions.


The soft diffraction phenomena in elastic proton-proton scattering are reviewed from the viewpoint of experiments at the LHC (TOTEM and ATLAS collaboration). I will especially examine the recent experimental data obtained at the LHC up to a center-of-mass energy of 13 TeV taking into account the requirements on the main properties of the scattering amplitude (analyticity, unitarity) and discussing the possible energy dependence of the real and imaginary parts of the Odderon amplitude.


I will show that in the framework of the High Energy General Structure (HEGS) model, taking the same intercept for the Odderon (maximal Odderon) and the Pomeron leads to a good fit of the new LHC data at 13 TeV. and show that the main effect of the Odderon can be seen in the region of the diffraction minimum of the differential elastic cross section.

TBA
Antoine Mérand (ESO)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)


Café, thé et biscuits seront servis après le séminaire...

TBA
Marjorie Decleir (U Gent)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)


Café, thé et biscuits seront servis après le séminaire...