ATTENTION: We have to do a short maintenance with downtime on Wed 19 Oct 2022, 9:00 - 10:00 CEST. Please finish your work in time to prevent data loss.

# EPS-HEP2021 conference

Jul 26 – 30, 2021
Zoom
Europe/Berlin timezone

## The Gluon Exchange Model for diffractive and inelastic collisions

Jul 27, 2021, 10:15 AM
15m
Zoom

#### Zoom

Parallel session talk Heavy Ion Physics

### Speaker

Marek Jeżabek (Institute of Nuclear Physics, Polish Academy of Sciences)

### Description

We propose a new model for a homogeneous description of hadron-hadron and hadron-nucleus collisions, the Gluon Exchange Model (GEM). While technically our model can be regarded as a generalization of the Dual Parton Model by Capella and Tran Thanh Van, it is fundamentally based on the number of exchanged color octets (gluons) and significantly extends the Fock space of states available for the participating protons and nucleons.

In proton-proton collisions we provide an exact description of the final state proton and neutron spectrum. What is remarkable is that unlike the original DPM, GEM successfully describes the proton “diffractive peak” at high $x_F$ as a specific case of color octet exchange.

In proton-nucleus reactions we find that the projectile proton diquark cannot survive in more than about half of multiple proton-nucleon processes and consequently must be very frequently disintegrated, leading to long transfers of baryon number over rapidity space.

This talk will be partially based on our recent paper, Phys. Lett. B 816 (2021) 136200, e-Print: 2101.01999 [nucl-th]

Email marek.jezabek@ifj.edu.pl theory Marek Jeżabek

### Primary authors

Andrzej Rybicki (Institute of Nuclear Physics Polish Academy of Sciences) Marek Jeżabek (Institute of Nuclear Physics, Polish Academy of Sciences)