The production of J/ψ pairs in proton–proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of 37.5 pb^−1 collected with the LHCb detector. The production cross-section for pairs with both J/ψ in the rapidity range 2 < y(J/ψ) < 4.5 and transverse momentum pT(J/ψ) < 10 GeV/c is σ(J/ψ J/ψ) = 5.1 ± 1.0 ± 1.1 nb, where the first uncertainty is statistical and the second systematic.
Observation of J/ψ-pair Production in pp Collisions at √s = 7 TeV
CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;
2012
Abstract
The production of J/ψ pairs in proton–proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of 37.5 pb^−1 collected with the LHCb detector. The production cross-section for pairs with both J/ψ in the rapidity range 2 < y(J/ψ) < 4.5 and transverse momentum pT(J/ψ) < 10 GeV/c is σ(J/ψ J/ψ) = 5.1 ± 1.0 ± 1.1 nb, where the first uncertainty is statistical and the second systematic.File in questo prodotto:
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