The production of ϒ(1S), ϒ(2S) and ϒ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected in proton–proton collisions at a centre-of-mass energy of √ s = 2.76TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the ϒ transverse momentum and rapidity, over the ranges pT < 15 GeV/c and 2.0 < y < 4.5. The total cross-sections in this kinematic region, assuming unpolarised production, aremeasured to be σ (pp → ϒ(1S)X) × B ϒ(1S)→μ + μ − = 1.111 ± 0.043 ± 0.044 nb, σ (pp → ϒ(2S)X) × B ϒ(2S)→μ + μ − = 0.264 ± 0.023 ± 0.011 nb, σ (pp → ϒ(3S)X) × B ϒ(3S)→μ + μ − = 0.159 ± 0.020 ± 0.007 nb, where the first uncertainty is statistical and the second systematic.

Measurement of Υ production in pp collisions at s√=2.76TeV

ANDREOTTI, Mirco;CALABRESE, Roberto;FIORE, Marco;FIORINI, Massimiliano;LUPPI, Eleonora;MANZALI, Matteo;PAPPALARDO, Luciano Libero;SAVRIE', Mauro;TELLARINI, Giulia;TOMASSETTI, Luca;
2014

Abstract

The production of ϒ(1S), ϒ(2S) and ϒ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected in proton–proton collisions at a centre-of-mass energy of √ s = 2.76TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the ϒ transverse momentum and rapidity, over the ranges pT < 15 GeV/c and 2.0 < y < 4.5. The total cross-sections in this kinematic region, assuming unpolarised production, aremeasured to be σ (pp → ϒ(1S)X) × B ϒ(1S)→μ + μ − = 1.111 ± 0.043 ± 0.044 nb, σ (pp → ϒ(2S)X) × B ϒ(2S)→μ + μ − = 0.264 ± 0.023 ± 0.011 nb, σ (pp → ϒ(3S)X) × B ϒ(3S)→μ + μ − = 0.159 ± 0.020 ± 0.007 nb, where the first uncertainty is statistical and the second systematic.
2014
R., Aaij; B., Adeva; M., Adinolfi; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; S., Ali; G., Alkhazov; P., Alvarez Cartelle;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2099220
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