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Jul 26 – 30, 2021
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The Gluon Exchange Model for diffractive and inelastic collisions

Jul 27, 2021, 10:15 AM


Parallel session talk Heavy Ion Physics T05: Heavy Ion Physics


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


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]

Collaboration / Activity theory
First author Marek Jeżabek

Primary authors

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

Presentation materials