Midrapidity hyperon production in pp and pA collisions from low to LHC energies

Abstract

The experimental data on p, Λ, Ξ − , Ω − -baryons and the corresponding antibaryons spectra obtained by different collaborations are compared with the results of the calculations performed into the frame of the Quark-Gluon String Model. The contribution of String Junction diffusion and the inelastic screening corrections are accounted for in the theoretical calculations. The predictions of the Quark-Gluon String Model both for pp and pA collisions are extended up to the LHC energies.PACS. 25.75.Dw Particle and resonance production 1 arXiv:1509.05218v1 [hep-ph]

Electromagnetic dipole moments of charged baryons with bent crystals at the LHC

“…In this case, the Ω + b → Ω 0 c π + and Ω 0 c branching ratios are unknown, and we assume the latter to be the same as for Ξ 0 c decays and scale [4]. For the Ξ + and Ω + antibaryons, which contain two and three s valence antiquarks respectively, the cross sections are estimated by scaling the Λ production cross section using the universal strangeness suppression factor at high energies, λ s ≈ 0.32 [85].…”

Description of ϕ-meson production in hadronic and nuclear collisions at very high energies

“…The QGSM analysis gives a quantitatively consistent description of the spectra of secondary φ mesons, as well as of the ratios of φ/π − and φ/K − production cross sections in pp-collisions for a large scope of the initial energy going up to the RHIC and LHC ranges. In the case of collisions with a nuclear target, the description of the experimental data is also quantitatively good for both the initial energy dependence and the A-dependence of the produced φ-mesons, and, in particular, a natural explanation appears for the unusually small shadow corrections experimentally observed in protonnucleus and nucleus-nucleus collisions at very high energies for the inclusive density [7,12,18,19] (saturation of the inclusive density) in the central rapidity region.…”

Multistrange Hyperon Production on Nuclear Targets

“…The experimental data on proton and hyperon productiom were reasonably described in [16]. The data for p+Be and p+Pb collisions were also described in the same reference, but it appears that the value of the strange suppression parameter λ s =0.25 would have to be slightly increased to get a better comparison with the experimental data.…”

“…The QGSM provides a succesful thorough description of multiparticle production processes in hadron-hadron [9,10,11,12,13], hadron-nucleus [14,15,16], and nucleusnucleus [17,18,19,20] collisions, for a wide energy region. In partcular, the inclusive spectra of charged pions, kaons, nucleons, and Λ hyperons, were correctly described in the cited papers.…”