Measurement of Upsilon production in collisions at root s=2.76 TeV

R. Aaij, J.F.J. van den Brand, K. De Bruyn, C. Farinelli, V.A.M. Heijne, T.J. Ketel, R. Koopman, D.M. Lambert, R.W. Lambert, J. van Leerdam, Y.J. Li, M.H.M. Merk, S. Oggero, H.G. Raven, M. Schiller, V. Syropoulos, S. Tolk, S. Wu

Research output: Contribution to JournalArticleAcademicpeer-review


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 = 2.76 TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the ϒ transverse momentum and rapidity, over the ranges p<inf>T</inf> < 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.
Original languageEnglish
Pages (from-to)2835-2835
JournalEuropean Physical Journal C. Particles and Fields
Issue number4
Publication statusPublished - 2014

Bibliographical note

PT: J; NR: 54; TC: 5; J9: EUR PHYS J C; PG: 11; GA: AG4HR; UT: WOS:000335380800001


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