XXVIth International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum Chromodynamics"

First 3-body final state analysis of γ d → π- p p_S reaction in the quasi-free domain

Not scheduled

20m

VBLHEP JINR

20 min. Dynamics of multiparticle production Dynamics of multiparticle production

Speaker

pivnyuk, nikolai (Leading Scientist, PhD, NRC "Kurchatov Institute" , KKTEP - ITEP)

Description

For the first time in high energy physics, the final state of the reaction with the slow (missing) proton (that is at the region of so called Quasi-Free kinematics) was analyzed essentially in the framework of the 3-body Phase Space.

We present detailed analysis of the γd → πˉp p_S reaction at the initial energy range Eγ = 1.0-3.5 GeV, and missing slow proton momentum ps < 0.2 GeV/c. Data was taken by CLAS detector at Jefferson LAB during the g10 run period.

Strong correlations between soft (d → n p_S) and hard (γn → πˉp) parts of the reaction amplitude have been clearly observed.

Presentation materials

presentation_baldin_seminar_2025.pdf