Measurement of beauty-quark production in pp collisions at s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 13 TeV via non-prompt D mesons

被引：0

作者：

S. Acharya ^{[148
]}

D. Adamová ^{[128
]}

A. Agarwal ^{[87
]}

G. Aglieri Rinella ^{[136
]}

L. Aglietta ^{[33
]}

M. Agnello ^{[25
]}

N. Agrawal ^{[30
]}

Z. Ahammed ^{[26
]}

S. Ahmad ^{[136
]}

S. U. Ahn ^{[16
]}

I. Ahuja ^{[72
]}

A. Akindinov ^{[38
]}

V. Akishina ^{[39
]}

M. Al-Turany ^{[98
]}

D. Aleksandrov ^{[57
]}

B. Alessandro ^{[6
]}

H. M. Alfanda ^{[68
]}

R. Alfaro Molina ^{[16
]}

B. Ali ^{[26
]}

A. Alici ^{[117
]}

N. Alizadehvandchali ^{[105
]}

A. Alkin ^{[21
]}

J. Alme ^{[53
]}

G. Alocco ^{[65
]}

T. Alt ^{[51
]}

A. R. Altamura ^{[96
]}

I. Altsybeev ^{[45
]}

J. R. Alvarado ^{[6
]}

M. N. Anaam ^{[46
]}

C. Andrei ^{[116
]}

N. Andreou ^{[127
]}

A. Andronic ^{[95
]}

E. Andronov ^{[55
]}

V. Anguelov ^{[52
]}

F. Antinori ^{[75
]}

P. Antonioli ^{[104
]}

N. Apadula ^{[65
]}

L. Aphecetche ^{[74
]}

H. Appelshäuser ^{[26
]}

C. Arata ^{[23
]}

S. Arcelli ^{[57
]}

M. Aresti ^{[111
]}

R. Arnaldi ^{[20
]}

J. G. M. C. A. Arneiro ^{[139
]}

I. C. Arsene ^{[33
]}

M. Arslandok ^{[98
]}

A. Augustinus ^{[16
]}

R. Averbeck ^{[125
]}

M. D. Azmi ^{[54
]}

H. Baba ^{[105
]}

机构：

[1] A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation,Department of Physics

[2] AGH University of Krakow,Department of Physics

[3] Bogolyubov Institute for Theoretical Physics,Department of Physics

[4] National Academy of Sciences of Ukraine,Department of Physics

[5] Bose Institute,Department of Physics

[6] Department of Physics and Centre for Astroparticle Physics and Space Science (CAPSS),Department of Physics and Technology

[7] California Polytechnic State University,Dipartimento di Fisica

[8] Central China Normal University,Dipartimento di Scienze MIFT

[9] Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN),Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture

[10] Centro de Investigación y de Estudios Avanzados (CINVESTAV),Faculty of Engineering and Science

[11] Chicago State University,Faculty of Nuclear Sciences and Physical Engineering

[12] China Institute of Atomic Energy,Faculty of Physics

[13] China University of Geosciences,Faculty of Science

[14] Chungbuk National University,Frankfurt Institute for Advanced Studies

[15] Comenius University Bratislava,High Energy Physics Group

[16] Faculty of Mathematics,Institute for Gravitational and Subatomic Physics (GRASP)

[17] Physics and Informatics,Institute of Experimental Physics

[18] COMSATS University Islamabad,Institute of Physics

[19] Creighton University,Institut für Kernphysik

[20] Aligarh Muslim University,Instituto de Ciencias Nucleares

[21] Pusan National University,Instituto de Física

[22] Sejong University,Instituto de Física

[23] University of California,National Institute of Science Education and Research

[24] University of Oslo,Niels Bohr Institute

[25] University of Bergen,Physics department, Faculty of science

[26] Università di Pavia,Physics Department

[27] Dipartimento di Fisica dell’Università and Sezione INFN,Physics Department

[28] Dipartimento di Fisica dell’Università and Sezione INFN,Physics Program and International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2)

[29] Dipartimento di Fisica dell’Università and Sezione INFN,Physikalisches Institut

[30] Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN,Physikalisches Institut

[31] Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN,Physik Department

[32] Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN,Saha Institute of Nuclear Physics

[33] Dipartimento di Fisica ‘E.R. Caianiello’ dell’Università and Gruppo Collegato INFN,School of Physics and Astronomy

[34] Dipartimento DISAT del Politecnico and Sezione INFN,Sección Física, Departamento de Ciencias

[35] Università di Messina,The Henryk Niewodniczanski Institute of Nuclear Physics

[36] Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN,Variable Energy Cyclotron Centre

[37] European Organization for Nuclear Research (CERN),Department of Applied Physics

[38] University of Split,Institute of Theoretical Physics

[39] Western Norway University of Applied Sciences,undefined

[40] Czech Technical University in Prague,undefined

[41] Sofia University,undefined

[42] P.J. Šafárik University,undefined

[43] Johann Wolfgang Goethe-Universität Frankfurt,undefined

[44] Fudan University,undefined

[45] Gangneung-Wonju National University,undefined

[46] Gauhati University,undefined

[47] Department of Physics,undefined

[48] Helmholtz-Institut für Strahlen- und Kernphysik,undefined

[49] Rheinische Friedrich-Wilhelms-Universität Bonn,undefined

[50] Helsinki Institute of Physics (HIP),undefined

来源：

Journal of High Energy Physics | / 2024卷 / 10期

关键词：

Hadron-Hadron Scattering; Heavy Quark Production; QCD;

D O I：

10.1007/JHEP10(2024)110

中图分类号：

学科分类号：

摘要：

The pT-differential production cross sections of non-prompt D0, D+, and Ds+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\textrm{D}}_{\textrm{s}}^{+} $$\end{document} mesons originating from beauty-hadron decays are measured in proton–proton collisions at a centre-of-mass energy s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 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, fs/(fu + fd), 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 s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document} = 5.02 and 13 TeV, showing a hardening of the non-prompt D-meson pT-differential production cross section at higher s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s} $$\end{document}. Finally, the bb¯\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \textrm{b}\overline{\textrm{b}} $$\end{document} production cross section per unit of rapidity at midrapidity is calculated from the non-prompt D0, D+, Ds+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\textrm{D}}_{\textrm{s}}^{+} $$\end{document}, and Λc+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\Lambda}_{\textrm{c}}^{+} $$\end{document} hadron measurements, obtaining dσ/dy=75.2±3.2stat.±5.2syst.−3.2+12.3extrap.\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \textrm{d}\sigma /\textrm{d}y=75.2\pm 3.2\left(\textrm{stat}.\right)\pm 5.2{\left(\textrm{syst}.\right)}_{-3.2}^{+12.3}\left(\textrm{extrap}.\right) $$\end{document} μb.

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