Energy dependence of $$\phi $$ meson production at forward rapidity in pp collisions at the LHCстатья
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Дата последнего поиска статьи во внешних источниках: 15 сентября 2021 г.
Аннотация:The production of ϕ\phi ϕ mesons has been studied in pp collisions at LHC energies with the ALICE detector via the dimuon decay channel in the rapidity region 2.5<y<42.5< y < 42.5<y<4. Measurements of the differential cross section d2σ/dydpT\mathrm{d}^2\sigma /\mathrm{d}y \mathrm{d}p_{\mathrm {T}}d2σ/dydpT are presented as a function of the transverse momentum (pTp_{\mathrm {T}}pT) at the center-of-mass energies s=5.02\sqrt{s}=5.02s=5.02, 8 and 13 TeV and compared with the ALICE results at midrapidity. The differential cross sections at s=5.02\sqrt{s}=5.02s=5.02 and 13 TeV are also studied in several rapidity intervals as a function of pTp_{\mathrm {T}}pT, and as a function of rapidity in three pTp_{\mathrm {T}}pT intervals. A hardening of the pTp_{\mathrm {T}}pT-differential cross section with the collision energy is observed, while, for a given energy, pTp_{\mathrm {T}}pT spectra soften with increasing rapidity and, conversely, rapidity distributions get slightly narrower at increasing pTp_{\mathrm {T}}pT. The new results, complementing the published measurements at s=2.76\sqrt{s}=2.76s=2.76 and 7 TeV, allow one to establish the energy dependence of ϕ\phi ϕ meson production and to compare the measured cross sections with phenomenological models. None of the considered models manages to describe the evolution of the cross section with pTp_{\mathrm {T}}pT and rapidity at all the energies.