Inhaltszusammenfassung

A measurement of inclusive, prompt, and non-prompt J/ψ production in p−Pb collisions at a nucleon--nucleon centre-of-mass energy sNN‾‾‾‾√=5.02 TeV is presented. The J/ψ mesons are reconstructed in the dielectron decay channel at midrapidity down to a transverse momentum pT=0. The inclusive J/ψ nuclear modification factor RpPb is calculated by comparing the results in p−Pb collisions to a measured proton−proton reference at the same centre-of-mass energy. Non-prompt J/ψ mesons, which originate...A measurement of inclusive, prompt, and non-prompt J/ψ production in p−Pb collisions at a nucleon--nucleon centre-of-mass energy sNN‾‾‾‾√=5.02 TeV is presented. The J/ψ mesons are reconstructed in the dielectron decay channel at midrapidity down to a transverse momentum pT=0. The inclusive J/ψ nuclear modification factor RpPb is calculated by comparing the results in p−Pb collisions to a measured proton−proton reference at the same centre-of-mass energy. Non-prompt J/ψ mesons, which originate from the decay of beauty hadrons, are separated from promptly produced J/ψ on a statistical basis for pT larger than 1.0 GeV/c. These results are based on the data sample collected by the ALICE detector during the 2016 LHC p−Pb run, corresponding to an integrated luminosity int=292±11μb−1, which is six times larger than the previous publications. The total uncertainty on the pT-integrated inclusive J/ψ and non-prompt J/ψ cross section are reduced by a factor 1.7 and 2.2, respectively. The measured cross sections and RpPb are compared with theoretical models that include various combinations of cold nuclear matter effects. From the non-prompt J/ψ production cross section, the bb⎯⎯⎯ production cross section at midrapidity, dσbb⎯⎯⎯/dy, and the total cross section extrapolated over full phase space, σbb⎯⎯⎯, are derived. » weiterlesen» einklappen

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DDC Sachgruppe:
Physik