The production of J/psi and Upsilon mesons in pp collisions at sqrt(s) = 8 TeV is studied with the LHCb detector. The J/psi and Upsilon mesons are reconstructed in the mu+mu decay mode and the signal yields are determined with a fit to the mu+mu invariant mass distributions. The analysis is performed in the rapidity range 2.0<y<4.5 and transverse momentum range 0<p_T<14(15) GeV/c of the J/psi(Upsilon) mesons. The J/psi and Upsilon production crosssections and the fraction of J/psi mesons from bhadron decays are measured as a function of the meson p_T and y.
Projections of the fit result for a selected bin in $p_{\rm T}$ and $y$ for (a) the $ J/\psi$ invariant dimuon mass and (b) $t_z$. For the former, the total fitted function is shown (blue solid line) together with the signal distribution (red dotted line). In the $t_z$ projection the total fitted function is shown together with the $ J/\psi \mathrm{from} b $ component, the prompt signal, the background and the tail component due to the association of a $ J/\psi$ candidate with a wrong PV. 
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Invariant mass distribution of the selected $\varUpsilon\rightarrow \mu^+\mu^$ candidates in the range $ p_{\rm T} <15\, {\mathrm{\,GeV\!/}c} $ and $2.0<y<4.5$. The three peaks correspond to the $\varUpsilon(1S)$, $\varUpsilon(2S)$ and $\varUpsilon(3S)$ meson signals (from left to right). The superimposed curve and the signal yields (dotted) are the result of the fit described in the text. 
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Differential production crosssection for (a) prompt $ J/\psi$ mesons and (b) $ J/\psi \mathrm{from} b $ as a function of $p_{\rm T}$ in bins of $y$. It is assumed that prompt $ J/\psi$ mesons are produced unpolarised. The errors are the quadratic sums of the statistical and systematic uncertainties. 
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Differential production crosssection as a function of $y$ integrated over $p_{\rm T}$ , for (a) unpolarised $\mathrm{prompt} J/\psi$ mesons and (b) $ J/\psi \mathrm{from} b $ . The errors are the quadratic sums of the statistical and systematic uncertainties. 
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Fraction of $ J/\psi \mathrm{from} b $ as a function of $p_{\rm T}$ , in bins of $y$. 
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Doubledifferential crosssections times dimuon branching fractions as a function of $p_{\rm T}$ in bins of $y$ for (a) the $\varUpsilon(1S)$, (b) $\varUpsilon(2S)$ and (c) $\varUpsilon(3S)$ mesons. 
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Differential production crosssections for $\varUpsilon(1S)$, $\varUpsilon(2S)$ and $\varUpsilon(3S)$ mesons times dimuon branching fraction (a) as a function of $ p_{\rm T} $ integrated over $y$, and (b) as a function of $y$ integrated over $ p_{\rm T} $. 
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{\it } Ratio of the $\varUpsilon(2S)$ to $\varUpsilon(1S)$ and $\varUpsilon(3S)$ to $\varUpsilon(1S)$ crosssections times dimuon branching fractions (a) as a function of $ p_{\rm T} $ integrated over $y$, and (b) as a function of $y$ integrated over $ p_{\rm T} $. 
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Comparison of the differential crosssection for the production of prompt $ J/\psi$ meson (under the assumption of zero polarisation) as a function of $ p_{\rm T} $ with direct production in an NLO NRQCD model [47,48] (orange diagonal shading), an NNLO* CSM [10] (solid yellow) and an NLO CSM [7] (blue vertical shading). The points show the measurements reported in this analysis. 
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Differential production crosssection for $ J/\psi \mathrm{from} b $ (a) as a function of $p_{\rm T}$ in the fiducial range $2.0<y<4.5$, and (b) as a function of $y$ in the fiducial range $ p_{\rm T} <14\, {\mathrm{\,GeV\!/}c} $. The FONLL prediction [46,50] is shown in yellow. The points show the measurements reported in this analysis. 
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Predictions based on the FONLL formalism [46,50] for the production crosssection for $ J/\psi \mathrm{from} b $ in the fiducial range $0< p_{\rm T} <14\, {\mathrm{\,GeV\!/}c} $ and $2.0<y<4.5$ (yellow band). The uncertainty includes contributions from the renormalisation scale, quark masses and the choice of PDF set. The black dotted line shows the central value of the prediction. The points show the LHCb measurements at $\sqrt{s}=2.76$ [14], 7 [12], and 8$\,\mathrm{\,TeV} $. 
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Comparison of the differential production crosssections times dimuon branching fractions for (a) $\varUpsilon(1S)$, (b) $\varUpsilon(2S)$ and (c) $\varUpsilon(3S)$ mesons as a function of $ p_{\rm T} $ with direct production in an NNLO$^*$ CSM [9] (solid yellow) and an NLO CSM [7] (blue vertical shading) model. The points show the measurements reported in this analysis. 
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Animated gif made out of all figures. 
PAPER2013016.gif Thumbnail 
Selection criteria for the $ J/\psi$ and $\varUpsilon$ meson analyses. Criteria common to both analyses are displayed between the two columns. 
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Relative systematic uncertainties (in %) on the $ J/\psi$ and $\varUpsilon$ crosssection results and on the fraction of $ J/\psi \mathrm{from} b $ . 
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Differential production crosssection ${\rm d}\sigma/{\rm d}y$ in nb for $\mathrm{prompt} J/\psi$ mesons (assumed unpolarised) and for $ J/\psi \mathrm{from} b $ , integrated over $p_{\rm T}$ . The first uncertainty is statistical, the second (third) is the part of the systematic uncertainty that is uncorrelated (correlated) between bins. 
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Doubledifferential crosssection $\frac{{\rm d}^2\sigma}{{\rm d}p_{\rm T}{\rm d}y}$ in nb/( $ {\mathrm{\,GeV\!/}c}$ ) for prompt $ J/\psi$ meson production in bins of of $p_{\rm T}$ and $y$, with the assumption of no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. 
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Doubledifferential crosssection $\frac{{\rm d}^2\sigma}{{\rm d}p_{\rm T}{\rm d}y}$ in nb/( $ {\mathrm{\,GeV\!/}c}$ ) for the production of $ J/\psi \mathrm{from} b $ in bins of $p_{\rm T}$ and $y$. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. 
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Fraction of $ J/\psi \mathrm{from} b $ (in %) in bins of of $p_{\rm T}$ and $y$. The first uncertainty is statistical and the second systematic (uncorrelated between bins). 
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Doubledifferential production crosssections $\frac{{\rm d}^2\sigma}{{\rm d}p_{\rm T}{\rm d}y}\times \mathcal{B}^{1S}$ in pb/( $ {\mathrm{\,GeV\!/}c}$ ) for the $\varUpsilon(1S)$ meson in bins of transverse momentum and rapidity, assuming no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. 
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Doubledifferential production crosssections $\frac{{\rm d}^2\sigma}{{\rm d}p_{\rm T}{\rm d}y}\times \mathcal{B}^{2S}$ in pb/( $ {\mathrm{\,GeV\!/}c}$ ) for the $\varUpsilon(2S)$ meson in bins of transverse momentum and rapidity, assuming no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. Regions where the number of events was not large enough to perform a measurement are indicated with a dash. 
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Doubledifferential production crosssections $\frac{{\rm d}^2\sigma}{{\rm d}p_{\rm T}{\rm d}y}\times \mathcal{B}^{3S}$ in pb/( $ {\mathrm{\,GeV\!/}c}$ ) for the $\varUpsilon(3S)$ meson in bins of transverse momentum and rapidity, assuming no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. Regions where the number of events was not large enough to perform a measurement are indicated with a dash. 
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Ratios of crosssections $\varUpsilon(2S)\rightarrow\mu^+\mu^$ and $\varUpsilon(3S)\rightarrow\mu^+\mu^$ with respect to {$\varUpsilon(1S)\rightarrow\mu^+\mu^$} as a function of $ p_{\rm T} $ in the range $2.0<y<4.0$, assuming no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. 
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Ratios of crosssections $\varUpsilon(2S)\rightarrow\mu^+\mu^$ and $\varUpsilon(3S)\rightarrow\mu^+\mu^$ with respect to {$\varUpsilon(1S)\rightarrow\mu^+\mu^$} as a function of $y$ in the range $2.0<y<4.0$, assuming no polarisation. The first error is statistical, the second is the component of the systematic uncertainty that is uncorrelated between bins and the third is the correlated component. 
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This ZIP file contains supplemetary material for the publication LHCbPAPER2013016. The files are the three formats of the Figure 13, whose description is below. Fig.13: Comparison of the differential crosssection for the production of prompt J/psi as a function of y with direct production in a NLO NRQCD model 
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Created on 09 December 2018.Citation count from INSPIRE on 09 December 2018.