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Measurement of Upsilon production in pp collisions at $\sqrt{s}$ = 2.76 TeV


LHCb Collaboration; Bernet, R; Müller, K; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2014). Measurement of Upsilon production in pp collisions at $\sqrt{s}$ = 2.76 TeV. European Physical Journal C - Particles and Fields, 74:2835.

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 3.3 pb−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 pT<15 GeV/c and 2.0<y<4.5. The total cross-sections in this kinematic region, assuming unpolarised production, are measured to be σ(pp→Υ(1S)X)×B(Υ(1S)→μ+μ−)σ(pp→Υ(2S)X)×B(Υ(2S)→μ+μ−)σ(pp→Υ(3S)X)×B(Υ(3S)→μ+μ−)===1.111±0.043±0.044nb,0.264±0.023±0.011nb,0.159±0.020±0.007nb,
where the first uncertainty is statistical and the second systematic.

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 3.3 pb−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 pT<15 GeV/c and 2.0<y<4.5. The total cross-sections in this kinematic region, assuming unpolarised production, are measured to be σ(pp→Υ(1S)X)×B(Υ(1S)→μ+μ−)σ(pp→Υ(2S)X)×B(Υ(2S)→μ+μ−)σ(pp→Υ(3S)X)×B(Υ(3S)→μ+μ−)===1.111±0.043±0.044nb,0.264±0.023±0.011nb,0.159±0.020±0.007nb,
where the first uncertainty is statistical and the second systematic.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2014
Deposited On:24 Feb 2015 14:18
Last Modified:21 Nov 2017 17:49
Publisher:Springer
ISSN:1434-6044
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1140/epjc/s10052-014-2835-1

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