Mechanisms of Forward–Backward Correlations in the Multiplicity of Particles in Ultrarelativistic Heavy-Ion Collisions
- Resource Type
- Authors
- Evgeny Zabrodin; A. S. Chernyshov; A. A. Sidorova; Igor Lokhtin
- Source
- Journal of Experimental and Theoretical Physics. 130:660-665
- Subject
- Physics
Large Hadron Collider
Solid-state physics
High Energy Physics::Phenomenology
General Physics and Astronomy
Forward backward
01 natural sciences
Ion
Nuclear physics
Fragmentation (mass spectrometry)
0103 physical sciences
Quark–gluon plasma
High Energy Physics::Experiment
Heavy ion
Multiplicity (chemistry)
Nuclear Experiment
010306 general physics
- Language
- ISSN
- 1090-6509
1063-7761
The contributions of various effects to correlations of the average multiplicity of particles emitted in the forward hemisphere of heavy-ion collisions with the multiplicity of particles emitted in the backward hemisphere (forward–backward correlations) have been comparatively analyzed. It has been shown that the experimentally observed dependence of the strength of such correlations on the centrality of lead–lead ion collisions at the Large Hadron Collider energy $$\sqrt {{{s}_{{NN}}}} $$ = 2.76 TeV can be reproduced by the HYDJET++ model if the hydrodynamic particle flow, decay of resonances, and production and suppression of high-energy quarks and gluons in hot matter are taken into account. The dominant mechanism of forward–backward correlations for the most central collisions involves the production and fragmentation of quark–gluon jets.