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  • Measurement of the non-prompt D-meson fraction as a function of multiplicity in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV
    M. Agnello; Z. Ahammed; S. U. Ahn; M. N. Anaam; A. Andronic; F. Antinori; A. Augustinus; A. Badalà; L. Barioglio; K. Barth; G. Batigne; P. Becht; J. Bielčíková; J. M. M. Camacho; P. Camerini; P. Chochula; G. Contin; M. C. Danisch; T. Dietel; P. Dupieux; V. N. Eikeland; P. Gasik; A. Ghimouz; D. J. Q. Goh; V. Grabski; S. Grigoryan; R. Guernane; S. P. Guzman; L. Gyulai; A. Hamdi; P. Hauer; T. Herman; H. Hillemanns; Y. Hou; M. Ippolitov; A. A. P. Jimenez; M. Jung; A. S. Kalteyer; P. Karczmarczyk; A. Khatun; J. S. Kim; J. Kim; G. Kornakov; T. Kumaoka; S. Kumar; P. Kurashvili; P. La Rocca; M. Lamanna; T. Lazareva; B. Lim; S. H. Lim; M. V. Makariev; G. Martínez García; A. L. Mazuecos; S. Mhlanga; D. L. Mihaylov; K. Mikhaylov; I. Morozov; T. Mrnjavac; S. Noh; P. Nomokonov; A. Nyanin; J. Nystrand; A. Ohlson; H. Park; L. G. Pereira; V. Petrov; S. Piano; P. Pillot; K. K. Pradhan; T. A. Rancien; S. S. Räsänen; M. Rodríguez Cahuantzi; S. Rojas Torres; D. Ruggiano; R. Rui; S. Sadhu; T. B. Saramela; N. Sarkar; V. Sarritzu; M. H. P. Sas; J. Schukraft; R. Shahoyan; H. Sharma; M. Sharma; S. Sharma; Q. Shou; R. J. M. Snellings; P. J. Steffanic; S. F. Stiefelmaier; C. Suire; G. J. Tambave; J. D. Tapia Takaki; T. Tkacik; T. P. Trzcinski; T. Virgili; W. Wu; S. Yuan; Z. Zhang; Y. Zhi

    The journal of high energy physics, 10/2023, Volume: 2023, Issue: 10
    Journal Article

    Abstract The fractions of non-prompt (i.e. originating from beauty-hadron decays) D0 and D+ mesons with respect to the inclusive yield are measured as a function of the charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of s $$ \sqrt{s} $$ = 13 TeV with the ALICE detector at the LHC. The results are reported in intervals of transverse momentum (p T) and integrated in the range 1 < p T < 24 GeV/c. The fraction of non-prompt D0 and D+ mesons is found to increase slightly as a function of p T in all the measured multiplicity intervals, while no significant dependence on the charged-particle multiplicity is observed. In order to investigate the production and hadronisation mechanisms of charm and beauty quarks, the results are compared to PYTHIA 8 as well as EPOS 3 and EPOS 4 Monte Carlo simulations, and to calculations based on the colour glass condensate including three-pomeron fusion.

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