CERN Accelerating science

The inverse of the average weight for $J/\psi$ candidates as a function of $J/\psi$ transverse momentum and center-of-mass rapidity. The relative contributions from kinematic acceptance, reconstruction, and trigger corrections are also shown. The weights are extracted from a combination of data and MC simulation.

The inverse of the average weight for $J/\psi$ candidates as a function of $J/\psi$ transverse momentum and center-of-mass rapidity. The relative contributions from kinematic acceptance, reconstruction, and trigger corrections are also shown. The weights are extracted from a combination of data and MC simulation.

The inverse of the average weight for $J/\psi$ candidates as a function of $J/\psi$ transverse momentum and center-of-mass rapidity. The relative contributions from kinematic acceptance, reconstruction, and trigger corrections are also shown. The weights are extracted from a combination of data and MC simulation.

Distributions of dimuon invariant mass (upper panel) and pseudoproper time (bottom panel) of weighted $J/\psi$ candidates in a representative interval of $J/\psi$ transverse momentum and center-of-mass rapidity. The projection of the function resulting from a two-dimensional unbinned maximum-likelihood fit is also shown.

Distributions of dimuon invariant mass (upper panel) and pseudoproper time (bottom panel) of weighted $J/\psi$ candidates in a representative interval of $J/\psi$ transverse momentum and center-of-mass rapidity. The projection of the function resulting from a two-dimensional unbinned maximum-likelihood fit is also shown.

Nonprompt fraction as a function of $J/\psi$ transverse momentum $p_{\mathrm{T}}$ (upper panel) and center-of-mass rapidity $y^{*}$ (bottom panel). Positive $y^{*}$ is defined in the proton beam direction. The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties.

Nonprompt fraction as a function of $J/\psi$ transverse momentum $p_{\mathrm{T}}$ (upper panel) and center-of-mass rapidity $y^{*}$ (bottom panel). Positive $y^{*}$ is defined in the proton beam direction. The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties.

Double differential cross-section for prompt and nonprompt $J/\psi$ production as a function of $J/\psi$ transverse momentum, $p_{\mathrm{T}}$. The upper panel shows results in backward $y^{*}$ (lead beam direction), and bottom panel in forward $y^{*}$ (proton beam direction). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties.

Double differential cross-section for prompt and nonprompt $J/\psi$ production as a function of $J/\psi$ transverse momentum, $p_{\mathrm{T}}$. The upper panel shows results in backward $y^{*}$ (lead beam direction), and bottom panel in forward $y^{*}$ (proton beam direction). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties.

Double differential cross-section for prompt and nonprompt $J/\psi$ as a function of $J/\psi$ center-of-mass rapidity $y^{*}$. Positive $y^{*}$ is defined in the proton beam direction. The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties.

Forward-backward production ratio $R_{\mathrm{FB}}$ measured in the center-of-mass rapidity range $|y^{*}| < 1.94$ as a function of $J/\psi$ transverse momentum, for prompt $J/\psi$ (upper panel) and nonprompt $J/\psi$ (bottom panel). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties. The narrow horizontal band in the upper panel represents the prediction from Ref.~\cite{Albacete:2013ei} described in the text.

Forward-backward production ratio $R_{\mathrm{FB}}$ measured in the center-of-mass rapidity range $|y^{*}| < 1.94$ as a function of $J/\psi$ transverse momentum, for prompt $J/\psi$ (upper panel) and nonprompt $J/\psi$ (bottom panel). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties. The narrow horizontal band in the upper panel represents the prediction from Ref.~\cite{Albacete:2013ei} described in the text.

Forward-backward production ratio $R_{\mathrm{FB}}$ as a function of center-of-mass rapidity $y^{*}$ for prompt $J/\psi$ (upper panel) and nonprompt $J/\psi$ (bottom panel). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties. The two bands in the upper panel represent the predictions from Refs.~\cite{Albacete:2013ei,Ferreiro:2013pua} described in the text.

Forward-backward production ratio $R_{\mathrm{FB}}$ as a function of center-of-mass rapidity $y^{*}$ for prompt $J/\psi$ (upper panel) and nonprompt $J/\psi$ (bottom panel). The error bars show the statistical uncertainty, and the shaded boxes show the sum in quadrature of statistical and systematic uncertainties. The two bands in the upper panel represent the predictions from Refs.~\cite{Albacete:2013ei,Ferreiro:2013pua} described in the text.

Differential cross-section for production of nonprompt $J/\psi$ as a function of $J/\psi$ transverse momentum (upper and middle panel) and center-of-mass rapidity (bottom panel) compared with a FONLL calculation for $pp$ collisions scaled by the number of nucleons in the Pb ion. Error bars represent the combination of statistical and systematic uncertainties added in quadrature. The shaded boxes represent the theoretical uncertainties on the FONLL predictions, computed as described in the text. These are strongly correlated between the bins.

Differential cross-section for production of nonprompt $J/\psi$ as a function of $J/\psi$ transverse momentum (upper and middle panel) and center-of-mass rapidity (bottom panel) compared with a FONLL calculation for $pp$ collisions scaled by the number of nucleons in the Pb ion. Error bars represent the combination of statistical and systematic uncertainties added in quadrature. The shaded boxes represent the theoretical uncertainties on the FONLL predictions, computed as described in the text. These are strongly correlated between the bins.

Differential cross-section for production of nonprompt $J/\psi$ as a function of $J/\psi$ transverse momentum (upper and middle panel) and center-of-mass rapidity (bottom panel) compared with a FONLL calculation for $pp$ collisions scaled by the number of nucleons in the Pb ion. Error bars represent the combination of statistical and systematic uncertainties added in quadrature. The shaded boxes represent the theoretical uncertainties on the FONLL predictions, computed as described in the text. These are strongly correlated between the bins.