Measurement of forward $J/\psi$ production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV

[to restricted-access page]

Abstract

The production of $J/\psi$ mesons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV is studied with the \lhcb detector. Cross-section measurements are performed as a function of the transverse momentum $p_\mathrm{T}$ and the rapidity $y$ of the $J/\psi$ meson in the region $p_\mathrm{T}<14\mathrm{GeV}/c$ and $2.0<y<4.5$, for both prompt $J/\psi$ mesons and $J/\psi$ mesons from $b$-hadron decays. The production cross-sections integrated over the kinematic coverage are $15.03\pm 0.03\pm 0.94$ $\mu$b for prompt $J/\psi$ and $2.25\pm 0.01\pm 0.14$ $\mu$b for $J/\psi$ from $b$-hadron decays, assuming zero polarization of the $J/\psi$ meson. The first uncertainties are statistical and the second systematic. The cross-section reported for $J/\psi$ mesons from $b$-hadron decays is used to extrapolate to a total $b\bar{b}$ cross-section. The ratios of the cross-sections with respect to $\sqrt{s}=8$ TeV are also determined.

Supplementary Material [file]

 Supplementary material full pdf supple[..].pdf [414 KiB] This ZIP file contains supplemetary material for the publication LHCb-PAPER-2015-037. The files are: supplementary.pdf : An overview of the extra figures *.C *.pdf, *.png, *.eps : The figures in various formats Fig1.pdf [18 KiB] HiDef png [211 KiB] Thumbnail [214 KiB] *C file Fig2.pdf [24 KiB] HiDef png [322 KiB] Thumbnail [315 KiB] *C file Fig3.pdf [19 KiB] HiDef png [269 KiB] Thumbnail [269 KiB] *C file Fig4.pdf [14 KiB] HiDef png [133 KiB] Thumbnail [124 KiB] *C file

Created on 20 August 2019.Citation count from INSPIRE on 23 August 2019.