# 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.

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.

## Citations

8 citations in Web of Science®
7 citations in Scopus®

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Item Type: Journal Article, refereed, original work 07 Faculty of Science > Physics Institute 530 Physics English 2014 24 Feb 2015 14:18 05 Apr 2016 19:03 Springer 1434-6044 https://doi.org/10.1140/epjc/s10052-014-2835-1
Permanent URL: https://doi.org/10.5167/uzh-108319

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