Measurement of beauty and charm production in pp collisions at $\sqrt{s}=5.02$ TeV via non-prompt and prompt D mesons

Abstract

The $p_{\mathrm{T}}$-differential production cross sections of prompt and non-prompt (produced in beauty-hadron decays) D mesons were measured by the ALICE experiment at midrapidity ($|y|<0.5$) in proton--proton collisions at $\sqrt{s}=5.02\mathrm{TeV}$. The data sample used in the analysis corresponds to an integrated luminosity of $(19.3\pm 0.4)\mathrm{n}{\mathrm{b}}^{-1}$. D mesons were reconstructed from their decays ${\mathrm{D}}^0\to {\mathrm{K}}^{-}{\pi }^{+}$, ${\mathrm{D}}^{+}\to {\mathrm{K}}^{-}{\pi }^{+}{\pi }^{+}$, and ${\mathrm{D}}_{\mathrm{s}}^{+}\to \varphi {\pi }^{+}\to {\mathrm{K}}^{-}{\mathrm{K}}^{+}{\pi }^{+}$ and their charge conjugates. Compared to previous measurements in the same rapidity region, the cross sections of prompt ${\mathrm{D}}^{+}$ and ${\mathrm{D}}_{\mathrm{s}}^{+}$ mesons have an extended $p_{\mathrm{T}}$ coverage and total uncertainties reduced by a factor ranging from 1.05 to 1.6, depending on $p_{\mathrm{T}}$, allowing for a more precise determination of their $p_{\mathrm{T}}$-integrated cross sections. The results are well described by perturbative QCD calculations. The fragmentation fraction of heavy quarks to strange mesons divided by the one to non-strange mesons, $f_{\mathrm{s}}/(f_{\mathrm{u}}+f_{\mathrm{d}})$, is compatible for charm and beauty quarks and with previous measurements at different centre-of-mass energies and collision systems. The $\mathrm{b}\overline{\mathrm{b}}$ production cross section per rapidity unit at midrapidity, estimated from non-prompt D-meson measurements, is $\mathrm{d}{\sigma }_{\mathrm{b}\overline{\mathrm{b}}}/\mathrm{d}y{|}_{|y|<0.5}=34.5\pm 2.4(stat.{)}_{-2.9}^{+4.7}(tot.syst.)\mu \mathrm{b}$. It is compatible with previous measurements at the same centre-of-mass energy and with the cross section predicted by perturbative QCD calculations.

36 pages, 13 captioned figures, 5 tables, authors from page 31, published version, figures at http://alice-publications.web.cern.ch/node/6833

References in corpus (17)

• PYTHIA 6.4 Physics and Manual
• An Introduction to PYTHIA 8.2
• New parton distributions for collider physics
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Measurement of high-p_T Single Electrons from Heavy-Flavor Decays in p+p Collisions at sqrt(s) = 200 GeV
• Charmed-Meson Fragmentation Functions with Finite-Mass Corrections
• Measurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at sqrt(s) = 7 TeV
• Fragmentation fractions of c and b quarks into charmed hadrons at LEP
• Measurement of ${\mathrm{D}}^0$, ${\mathrm{D}}^{+}$, ${\mathrm{D}}^{\ast +}$ and ${{\mathrm{D}}^{+}}_s$ production in pp collisions at $\sqrt{\text{s}}=5.02\mathbf{TeV}$ with ALICE
• Measurement of $B_c^{+}$ production in proton-proton collisions at $\sqrt{s}=8$ TeV
• Measurement of the B+- production cross-section in pp collisions at sqrt(s)=7 TeV
• Measurement of the $B_c^{-}$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions
• Measurement of the b-hadron production cross section using decays to D*muX final states in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Measurement of the ratio of the production cross sections times branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- and B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) in pp collisions at sqrt(s) = 7 TeV
• Measurement of the mass and production rate of ${\Xi }_b^{-}$ baryons
• Measurement of ${\Xi }_{cc}^{++}$ production in $pp$ collisions at $\sqrt{s}=13$ TeV
• Measurement of the cross section for production of b b-bar X, decaying to muons in pp collisions at sqrt(s)=7 TeV

Cited by in corpus (33)

• The ALICE experiment: a journey through QCD
• The Muon Puzzle in cosmic-ray induced air showers and its connection to the Large Hadron Collider
• Prompt D${}^0$, D${}^{+}$, and D${}^{\ast +}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• First study of the two-body scattering involving charm hadrons
• Observation of a multiplicity dependence in the $p_{\mathrm{T}}$-differential charm baryon-to-meson ratios in proton-proton collisions at $\sqrt{s}=13$ TeV
• Measurement of the cross sections of ${\Xi }_{\mathrm{c}}^0$ and ${\Xi }_{\mathrm{c}}^{+}$ baryons and branching-fraction ratio BR(${\Xi }_{\mathrm{c}}^0\to {\Xi }^{-}{\mathrm{e}}^{+}{\nu }_{\mathrm{e}}$)/BR(${\Xi }_{\mathrm{c}}^0\to {\Xi }^{-}{\pi }^{+}$) in pp collisions at 13 TeV
• Properties of the QCD Matter: A Review of Selected Results from the ALICE Experiment
• Measurement of the production cross section of prompt ${\Xi }_{\mathrm{c}}^0$ baryons at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 TeV
• Studying the interaction between charm and light-flavor mesons
• First measurement of ${\Lambda }_{\mathrm{c}}^{+}$ production down to $p_{\mathrm{T}}=0$ in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Enhanced production of ${\Lambda }_b^0$ baryons in high-multiplicity $pp$ collisions at $\sqrt{s}=13$ TeV
• Bottom hadro-chemistry in high-energy hadronic collisions
• Study of flavor dependence of the baryon-to-meson ratio in proton-proton collisions at $\sqrt{s}=13$ TeV
• Recombination of $B_c$ mesons in ultra-relativistic heavy-ion collisions
• Evidence for modification of $b$ quark hadronization in high-multiplicity $pp$ collisions at $\sqrt{s}=13$ TeV
• Measurement of Non-prompt ${\mathrm{D}}^0$-meson Elliptic Flow in Pb-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• Measurement of electrons from beauty-hadron decays in pp and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• A machine learning-based study of open-charm hadrons in proton-proton collisions at the Large Hadron Collider
• Measurement of ${\Omega }_{\mathrm{c}}^0$ baryon production and branching-fraction ratio $\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\mathrm{e}}^{+}{\nu }_{\mathrm{e}})/\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\pi }^{+})$ in pp collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the nuclear modification factor for muons from charm and bottom hadrons in Pb+Pb collisions at 5.02 TeV with the ATLAS detector
• Recent ALICE results on charm production and hadronisation
• Measurement of prompt ${\mathrm{D}}_{\mathrm{s}}^{+}$-meson production and azimuthal anisotropy in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• D${}^0$-meson-tagged jet axes difference in proton-proton collisions at $\sqrt{\text{s}}=5.02$ TeV
• Event-activity dependent production of strange and non-strange charmed baryons in the enhanced color-reconnection scheme
• First measurement of ${\mathrm{D}}_{s1}(1^{+})(2536{)}^{+}$ and ${\mathrm{D}}_{s2}^{\ast }(2^{+})(2573{)}^{+}$ production in proton-proton collisions at $\sqrt{s}=13$ TeV at the LHC
• D and B-meson production using kt-factorization calculations in a variable-flavor-number scheme
• Studies of beauty hadron and non-prompt charm hadron production in pp collisions at $\sqrt{s}$=13 TeV within a transport model approach
• Measurements of charm production in pp collisions with ALICE
• Heavy flavour production and spectroscopy
• Measurement of the production cross section of prompt ${\Xi }_{\mathrm{c}}^0$ baryons in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV