Measurement of beauty-quark production in pp collisions at $$ \sqrt{s} $$ = 13 TeV via non-prompt D mesons
Copyright policy )Measurement of beauty-quark production in pp collisions at $$ \sqrt{s} $$ = 13 TeV via non-prompt D mesons
Abstract The p T-differential production cross sections of non-prompt D0, D+, and $$ {\textrm{D}}_{\textrm{s}}^{+} $$ D s + mesons originating from beauty-hadron decays are measured in proton–proton collisions at a centre-of-mass energy $$ \sqrt{s} $$ s = 13 TeV. The measurements are performed at midrapidity, |y| < 0.5, with the data sample collected by ALICE from 2016 to 2018. The results are in agreement with predictions from several perturbative QCD calculations. The fragmentation fraction of beauty quarks to strange mesons divided by the one to non-strange mesons, f s /(f u + f d), is found to be 0.114 ± 0.016 (stat.) ± 0.006 (syst.) ± 0.003 (BR) ± 0.003 (extrap.). This value is compatible with previous measurements at lower centre-of-mass energies and in different collision systems in agreement with the assumption of universality of fragmentation functions. In addition, the dependence of the non-prompt D meson production on the centre-of-mass energy is investigated by comparing the results obtained at $$ \sqrt{s} $$ s = 5.02 and 13 TeV, showing a hardening of the non-prompt D-meson p T-differential production cross section at higher $$ \sqrt{s} $$ s . Finally, the $$ \textrm{b}\overline{\textrm{b}} $$ b b ¯ production cross section per unit of rapidity at midrapidity is calculated from the non-prompt D0, D+, $$ {\textrm{D}}_{\textrm{s}}^{+} $$ D s + , and $$ {\Lambda}_{\textrm{c}}^{+} $$ Λ c + hadron measurements, obtaining $$ \textrm{d}\sigma /\textrm{d}y=75.2\pm 3.2\left(\textrm{stat}.\right)\pm 5.2{\left(\textrm{syst}.\right)}_{-3.2}^{+12.3}\left(\textrm{extrap}.\right) $$ d σ / d y = 75.2 ± 3.2 stat . ± 5.2 syst . − 3.2 + 12.3 extrap . μb.
- Bose Institute India
- Polish Academy of Learning Poland
- University of Bergen Norway
- Utrecht University Netherlands
- Czech Academy of Sciences Czech Republic
13000 GeV-cms, 5020 GeV-cms, 5106 Nuclear and Plasma Physics (for-2020), strange meson, Heavy Quark Production, QC770-798, transverse momentum dependence, Atomic, fragmentation function, Mathematical Sciences, High Energy Physics - Experiment, rapidity dependence, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, ALICE, 4902 Mathematical physics (for-2020), D+: direct production, fragmentation, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 5107 Particle and high energy physics (for-2020), Nuclear Experiment (nucl-ex), info:eu-repo/classification/ddc/530, Nuclear Experiment, Mathematical Physics, 5107 Particle and High Energy Physics (for-2020), differential cross section: calculated, Quantum Physics, D/s+: direct production, ddc:530, 51 Physical Sciences (for-2020), Particle and High Energy Physics, 0206 Quantum Physics (for), Nuclear and Plasma Physics, Nuclear & Particles Physics, p p, Physical Sciences, 4902 Mathematical Physics (for-2020), 49 Mathematical Sciences (for-2020), Hadron-Hadron Scattering; Heavy Quark Production; QCD, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Particle and Plasma Physics (for), FOS: Physical sciences, bottom: pair production, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 5106 Nuclear and plasma physics (for-2020), meson, 530, D0: direct production, energy dependence, quark, differential cross section: measured, Nuclear and particle physics. Atomic energy. Radioactivity, quantum chromodynamics, TeV, 0105 Mathematical Physics (for), Nuclear, universality, quantum chromodynamics: perturbation theory, perturbation theory, Hadron-Hadron Scattering, scattering, Molecular, Nuclear & Particles Physics (science-metrix), QCD, rapidity, fragmentation function: universality, 0202 Atomic, hadron, production, p p: colliding beams, experimental results
13000 GeV-cms, 5020 GeV-cms, 5106 Nuclear and Plasma Physics (for-2020), strange meson, Heavy Quark Production, QC770-798, transverse momentum dependence, Atomic, fragmentation function, Mathematical Sciences, High Energy Physics - Experiment, rapidity dependence, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, ALICE, 4902 Mathematical physics (for-2020), D+: direct production, fragmentation, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 5107 Particle and high energy physics (for-2020), Nuclear Experiment (nucl-ex), info:eu-repo/classification/ddc/530, Nuclear Experiment, Mathematical Physics, 5107 Particle and High Energy Physics (for-2020), differential cross section: calculated, Quantum Physics, D/s+: direct production, ddc:530, 51 Physical Sciences (for-2020), Particle and High Energy Physics, 0206 Quantum Physics (for), Nuclear and Plasma Physics, Nuclear & Particles Physics, p p, Physical Sciences, 4902 Mathematical Physics (for-2020), 49 Mathematical Sciences (for-2020), Hadron-Hadron Scattering; Heavy Quark Production; QCD, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Particle and Plasma Physics (for), FOS: Physical sciences, bottom: pair production, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 5106 Nuclear and plasma physics (for-2020), meson, 530, D0: direct production, energy dependence, quark, differential cross section: measured, Nuclear and particle physics. Atomic energy. Radioactivity, quantum chromodynamics, TeV, 0105 Mathematical Physics (for), Nuclear, universality, quantum chromodynamics: perturbation theory, perturbation theory, Hadron-Hadron Scattering, scattering, Molecular, Nuclear & Particles Physics (science-metrix), QCD, rapidity, fragmentation function: universality, 0202 Atomic, hadron, production, p p: colliding beams, experimental results
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