Prompt and non-prompt J/Psi production cross sections at midrapidity in proton-proton collisions at √s = 5.02 and 13 TeV
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 $$...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
March 28, 2022
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| In: |
Journal of high energy physics
Year: 2022, Heft: 3, Pages: 1-34 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP03(2022)190 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP03(2022)190 Verlag, lizenzpflichtig, Volltext: https://link.springer.com/10.1007/JHEP03(2022)190 
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| Verfasserangaben: | The ALICE collaboration |
| Zusammenfassung: | The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at $$ \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. |
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| Beschreibung: | The ALICE collaboration: S. Acharya, V. Anguelov, M. Arslandok, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, M.K. Köhler, M. Kroesen, J.A. Lopez, N.A. Martin, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, M.A. Völkl, B. Windelband, A. Yuncu [und viele weitere] Im Titel steht der Buchstabe s unter dem Wurzelsymbol Im Titel ist "Psi" als griechischer Buchstabe dargestellt Gesehen am 20.08.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP03(2022)190 |