XXXVII International Workshop on High Energy Physics “Diffraction of hadrons: Experiment, Theory, Phenomenology”

Session

Afternoon session

2

22 Jul 2025, 15:00

Conveners

Afternoon session

• Roman Ryutin (NRC "Kurchatov Institute" - IHEP)

2. Multiplicity distribution and the reflective scattering

Sergey Troshin (NRC "Kurchatov institute"-IHEP, Protvino)

22/07/2025, 15:00

Phenomenological models

(OFFLINE)
Transition to the reflective scattering mode which has emerged at the highest LHC energy of $\sqrt{s}=13$ TeV results in a relative shrinkage with the energy of the impact parameter region responsible for the inelastic hadron collisions. Respective increasing role of the multiplicity fluctuations of quantum origin is emphasized.

3. Increasе of the Coalescence Coefficient in Diffraction Processes

Vladimir Vechernin (Saint-Petersburg State University)

22/07/2025, 15:45

General Quantum Theory and diffraction

(ONLINE)
We study the formation of high-energy deuterons by the coalescence mechanism in ultrarelativistic heavy-ion collisions. We find the coalescence coefficient by calculating the corresponding Feynman diagrams taking into account the coherent nature of the process. We show that the probability of neutron and proton fusion into a high-energy deuteron is higher in the diffraction region...

8. Multiplicity Distributions and Modified Combinants in the Multipomeron Model of pp Interaction at High Energies

Vladimir Kovalenko (Saint Petersburg State University)

22/07/2025, 16:45

Phenomenological models

(OFFLINE)
The multiplicity distributions of charged particles and their combinants for pp collisions at LHC energies are studied within the Multipomeron Exchange Model (MEM) that takes into account the phenomenon of string fusion. It is shown that the use of Gaussian-type distributions for multiplicity distributions at a fixed number of pomerons allows, within the MEM framework, the...

13. General discussion 1: Discussion leader: Vladimir Petrov

22/07/2025, 17:30