Numerical solutions to Giovannini’s QCD parton branching processes
| Autor: | E. Wang, Choo Hiap Oh, P. Agarwal, Z. Ong, Aik Hui Chan, H. W. Ang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Quark
Quantum chromodynamics Physics Particle physics 010308 nuclear & particles physics High Energy Physics::Lattice QC1-999 High Energy Physics::Phenomenology Bremsstrahlung Parton Branching (polymer chemistry) 01 natural sciences Charged particle Gluon Vertex (geometry) 0103 physical sciences High Energy Physics::Experiment 010306 general physics Nuclear Experiment |
| Zdroj: | EPJ Web of Conferences, Vol 240, p 07009 (2020) |
| Popis: | In 1979, Giovannini [1] formulated multiparticle production as a manifestation of four QCD processes: A: g → gg (gluon bremsstrahlung), A-: q → qg (quark bremsstrahlung), B: g → qq (quark pair creation) and C: g → ggg (four-gluon vertex). At present, only approximate solutions exist, such as the Generalized Multiplicity Distribution (GMD) which excludes pro- cesses B and C [2, 3]. These approximate solutions have been very successful in describing charged particle multiplicities at lower energies, at least until the appearance of a shoulder-like structure at √s ≈ 200 GeV and 900 GeV first reported by the UA5 collaboration [4], also known as “KNO-scaling violation”. Here, we extend the work of Sakai [5] and attempt a numerical solution that incorporates all four QCD processes, and see if the addition of processes B and C can explain the shoulder-like structure. |
| Databáze: | OpenAIRE |
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