The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at \( \sqrt{s} \) = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of \( \mathcal{L} \)int = 19.4 ± 0.4 nb-1 and \( \mathcal{L} \)int = 32.2 ± 0.5 nb-1 at \( \sqrt{s} \) = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at \( \sqrt{s} \) = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the \( \mathrm{b}\overline{\mathrm{b}} \) pair cross section at midrapidity and in the total phase space. The total \( \mathrm{b}\overline{\mathrm{b}} \) cross sections are found to be \( {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} \) = 541 ± 45 (stat.) ± 69 \( {\left(\mathrm{syst}.\right)}_{-12}^{+10} \) (extr.) μb and \( {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} \) = 218±37 (stat.)±31 \( {\left(\mathrm{syst}.\right)}_{-9.1}^{+8.2} \) (extr.) μb at \( \sqrt{s} \) = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at \( \sqrt{s} \) = 13 TeV is also provided.
Acharya, S, et al. "Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $ \sqrt{\mathrm{s}} $ = 5.02 and 13 TeV." Journal of High Energy Physics (Online), vol. 2022, no. 3, Mar. 2022. https://doi.org/10.1007/jhep03(2022)190
Acharya, S, Adamova, D, Adler, A, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I, Akbar, Z, Akindinov, A, Al-Turany, M, Alam, SN, Aleksandrov, D, Alessandro, B, Alfanda, HM, Alfaro Molina, R, ... Kushpil, S (2022). Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $ \sqrt{\mathrm{s}} $ = 5.02 and 13 TeV. Journal of High Energy Physics (Online), 2022(3). https://doi.org/10.1007/jhep03(2022)190
Acharya, S, Adamova, D, Adler, A, et al., "Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $ \sqrt{\mathrm{s}} $ = 5.02 and 13 TeV," Journal of High Energy Physics (Online) 2022, no. 3 (2022), https://doi.org/10.1007/jhep03(2022)190
@article{osti_1869664,
author = {Acharya, S and Adamova, D and Adler, A and Rinella, G Aglieri and Agnello, M and Agrawal, N and Ahammed, Z and Ahmad, S and Ahn, SU and Ahuja, I and others},
title = {Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $ \sqrt{\mathrm{s}} $ = 5.02 and 13 TeV},
annote = {The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at \( \sqrt{s} \) = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of \( \mathcal{L} \)int = 19.4 ± 0.4 nb-1 and \( \mathcal{L} \)int = 32.2 ± 0.5 nb-1 at \( \sqrt{s} \) = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at \( \sqrt{s} \) = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the \( \mathrm{b}\overline{\mathrm{b}} \) pair cross section at midrapidity and in the total phase space. The total \( \mathrm{b}\overline{\mathrm{b}} \) cross sections are found to be \( {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} \) = 541 ± 45 (stat.) ± 69 \( {\left(\mathrm{syst}.\right)}_{-12}^{+10} \) (extr.) μb and \( {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} \) = 218±37 (stat.)±31 \( {\left(\mathrm{syst}.\right)}_{-9.1}^{+8.2} \) (extr.) μb at \( \sqrt{s} \) = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at \( \sqrt{s} \) = 13 TeV is also provided.},
doi = {10.1007/jhep03(2022)190},
url = {https://www.osti.gov/biblio/1869664},
journal = {Journal of High Energy Physics (Online)},
issn = {ISSN 1029-8479},
number = {3},
volume = {2022},
place = {United States},
publisher = {Springer Nature},
year = {2022},
month = {03}}
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