The ALICE experiment has measured low-mass dimuon production in pp collisions at √s = 7 TeV in the dimuon rapidity region 2.5 < y < 4. The observed dimuon mass spectrum is described as a superposition of resonance decays (η,ρ,ω,η,φ) into muons and semi-leptonic decays of charmed mesons. The measured production cross sections for ω and φ are σω(1 < pt <5 GeV/c, 2.5 < y < 4) = 5.28±0.54(stat)±0.49(syst) mb and σφ(1 < pt <5 GeV/c, 2.5 < y < 4) = 0.940 ± 0.084(stat) ± 0.076(syst) mb. The differential cross sections d2σ/dy dpt are extracted as a function of pt for ω and φ. The ratio between the ρ and ω cross section is obtained. Results for the φ are compared with other measurements at the same energy and with predictions by models.
Light vector meson production in pp collisions at √s = 7 TeV
CAMERINI, Paolo;CONTIN, GIACOMO;FRAGIACOMO, ENRICO;GROSSO, Raffaele;LEA, RAMONA;MARGAGLIOTTI, GIACOMO;PIANO, STEFANO;RUI, RINALDO;VENARUZZO, MASSIMO;
2012-01-01
Abstract
The ALICE experiment has measured low-mass dimuon production in pp collisions at √s = 7 TeV in the dimuon rapidity region 2.5 < y < 4. The observed dimuon mass spectrum is described as a superposition of resonance decays (η,ρ,ω,η,φ) into muons and semi-leptonic decays of charmed mesons. The measured production cross sections for ω and φ are σω(1 < pt <5 GeV/c, 2.5 < y < 4) = 5.28±0.54(stat)±0.49(syst) mb and σφ(1 < pt <5 GeV/c, 2.5 < y < 4) = 0.940 ± 0.084(stat) ± 0.076(syst) mb. The differential cross sections d2σ/dy dpt are extracted as a function of pt for ω and φ. The ratio between the ρ and ω cross section is obtained. Results for the φ are compared with other measurements at the same energy and with predictions by models.Pubblicazioni consigliate
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