2017/04/30 by Liwen Yang, Yanyun Wang, Wenhui Hao +3 · 5 citations
Physics and Astronomy · #Baryon #High-Energy Particle Collisions Research #Large Hadron Collider #Meson #Particle decay #Particle physics theoretical and experimental studies #Percolation (cognitive psychology) #Quantum Chromodynamics and Particle Interactions #Scaling #Spectral line #Strange quark #String (physics) #hep-ph
paper · pdf · doi:10.1140/epja/i2018-12484-7
published in The European Physical Journal A 54(4) (Springer Science+Business Media) · 8 pages, 10 figures, accepted by EPJA
openalex created_date 2017/05/12 · arxiv created 2018/02/28 · openalex publication_date 2018/04/01 · arxiv updated 2018/04/12 · openalex updated_date 2026/08/05
As a complementary study to that performed on the transverse momentum (p\rm T) spectra of charged pions, kaons and protons in proton-proton (pp) collisions at LHC energies 0.9, 2.76 and 7 TeV, we present a scaling behaviour in the p\rm T spectra of strange particles (KS0, \rm Λ, \rm Ξ and ϕ) at these three energies. This scaling behaviour is exhibited when the spectra are expressed in a suitable scaling variable z=p\rm T/K, where the scaling parameter K is determined by the quality factor method and increases with the center of mass energy (√(s)). The rates at which K increases with ln√(s) for these strange particles are found to be identical within errors. In the framework of the colour string percolation model, we argue that these strange particles are produced through the decay of clusters that are formed by the colour strings overlapping. We observe that the strange mesons and baryons are produced from clusters with different size distributions, while the strange mesons (baryons) KS0 and ϕ (\rm Λ and \rm Ξ) originate from clusters with the same size distributions. The cluster's size distributions for strange mesons are more dispersed than those for strange baryons. The scaling behaviour of the p\rm T spectra for these strange particles can be explained by the colour string percolation model in a quantitative way.