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

61Citations signalées, ce qui n’est pas une note de qualité
150Institutions déclarées
36Pays d’affiliation déclarés

Rattachement africain : in, cz, de, se, ch, it, kr, id, ru, cn, mx, pk, us, no, ro, nl, fr, gr, hu, gb, pe, dk, pl, sk, br, at, Afrique du Sud, jp, cu, az, hr, am, tr, fi, th, ua. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

Abstract The pT-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 $$ \sqrt{s} $$ s = 5.02 TeV. The data sample used in the analysis corresponds to an integrated luminosity of (19.3 ± 0.4) nb−1. D mesons were reconstructed from their decays D0→ K−π+, D+→ K−π+π+, and $$ {\mathrm{D}}_{\mathrm{s}}^{+}\to \upphi {\uppi}^{+}\to {\mathrm{K}}^{-}{\mathrm{K}}^{+}{\uppi}^{+} $$ D s + → ϕ π + → K − K + π + and their charge conjugates. Compared to previous measurements in the same rapidity region, the cross sections of prompt D+ and $$ {\mathrm{D}}_{\mathrm{s}}^{+} $$ D s + mesons have an extended pT coverage and total uncertainties reduced by a factor ranging from 1.05 to 1.6, depending on pT, allowing for a more precise determination of their pT-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, fs/(fu + fd), is compatible for charm and beauty quarks and with previous measurements at different centre-of-mass energies and collision systems. The $$ \mathrm{b}\overline{\mathrm{b}} $$ b b ¯ production cross section per rapidity unit at midrapidity, estimated from non-prompt D-meson measurements, is $$ \mathrm{d}{\sigma}_{\mathrm{b}\overline{\mathrm{b}}}/\mathrm{d}y\left|{}_{\left|\mathrm{y}\right|<0.5}=34.5\pm 2.4{\left(\mathrm{stat}\right)}_{-2.9}^{+4.7}\left(\mathrm{tot}.\mathrm{syst}\right)\right. $$ d σ b b ¯ / d y y < 0.5 = 34.5 ± 2.4 stat − 2.9 + 4.7 tot . syst μb. It is compatible with previous measurements at the same centre-of-mass energy and with the cross section pre- dicted by perturbative QCD calculations.

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Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Measurement of beauty and charm production in pp collisions at $$ \sqrt{s} $$ = 5.02 TeV via non-prompt and prompt D mesons
Date Crossref
01/05/2021
Éditeur
Springer Science and Business Media LLC
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.

Les institutions déclarées

Variable Energy Cyclotron CentreHomi Bhabha National InstituteCzech Academy of Sciences, Nuclear Physics InstituteGoethe University FrankfurtLund UniversityEuropean Organization for Nuclear ResearchPolitecnico di TorinoIstituto Nazionale di Fisica Nucleare, Sezione di BolognaAligarh Muslim UniversityKorea Institute of Science & Technology InformationIndonesian Institute of SciencesKurchatov InstituteGSI Helmholtz Centre for Heavy Ion ResearchIstituto Nazionale di Fisica Nucleare, Sezione di TorinoCentral China Normal UniversityUniversidad Nacional Autónoma de MéxicoCOMSATS University IslamabadUniversity of HoustonUniversity of BergenSt Petersburg UniversityHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringNational Institute for Subatomic PhysicsUniversity of MünsterHeidelberg UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PadovaLawrence Berkeley National LaboratoryCentre National de la Recherche ScientifiqueLaboratoire de Physique Subatomique et des Technologies AssociéesIMT AtlantiqueInstitut National de Physique Nucléaire et de Physique des ParticulesNantes UniversitéUniversity of OsloLaboratoire de Physique des 2 Infinis Irène Joliot-CurieIstituto Nazionale di Fisica Nucleare, Sezione di CataniaGangneung–Wonju National UniversityIndian Institute of Technology IndoreUniversity of JammuCommissariat à l'Énergie Atomique et aux Énergies AlternativesUniversité Paris-SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of BonnBose InstituteTechnical University of MunichNational and Kapodistrian University of AthensHUN-REN Wigner Research Centre for PhysicsDaresbury LaboratoryUniversité Clermont AuvergneUniversity of LiverpoolJoint Institute for Nuclear ResearchIndian Institute of Technology BombayPontificia Universidad Católica del PerúUniversity of CopenhagenYale UniversityInstitut Pluridisciplinaire Hubert CurienUniversité de StrasbourgInstitute of Engineering PhysicsNational Research Nuclear University MEPhIPetersburg Nuclear Physics InstituteInstitute of Space Science - INFLPR SubsidiaryGauhati UniversityIstituto Nazionale di Fisica Nucleare, Sezione di CagliariCzech Technical University in PragueInstitute of Nuclear Physics, Polish Academy of SciencesThe University of Texas at AustinUniversity of PaviaIstituto Nazionale di Fisica Nucleare, Sezione di PaviaOak Ridge National LaboratoryInha UniversityUniversity of Pavol Jozef ŠafárikMoscow Institute of Physics and TechnologyHospital Universitário da Universidade de São PauloIstituto Nazionale di Fisica Nucleare, Sezione di BariPolytechnic University of BariAll-Russian Scientific Research Institute of Technical PhysicsStefan Meyer Institute for Subatomic PhysicsNational Research FoundationUniversidad Autónoma de SinaloaBenemérita Universidad Autónoma de PueblaIstituto Nazionale di Fisica Nucleare, Sezione di TriesteSaha Institute of Nuclear PhysicsLyon 1 UniversitéInstitut de Physique des 2 Infinis de LyonUniversidade Estadual de Campinas (UNICAMP)University of TsukubaUniversity of Cape TownUniversity of BirminghamLaboratoire de Physique Subatomique et de CosmologieUniversité Grenoble AlpesUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”Universidade Federal do ABCUniversity of SalernoFrankfurt Institute for Advanced StudiesWarsaw University of TechnologyUniversity of California, BerkeleyCentro de Aplicaciones Tecnológicas y Desarrollo NuclearInstitute for Nuclear ResearchPanjab UniversityNational Institute of Science Education and ResearchIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversity of TriesteChicago State UniversityNational Nuclear Research CenterUniversity of KansasUniversidade Federal do Rio Grande do SulWayne State UniversityUniversity of SplitUtrecht UniversityA. Alikhanyan National LaboratoryThe University of TokyoNagasaki Institute of Applied ScienceWestern Norway University of Applied SciencesCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalYonsei UniversityCreighton UniversityUniversity of Tennessee SystemUniversity of Tennessee at KnoxvilleThe Ohio State UniversityTechnical University of KošiceUniversity of ZagrebSlovak Academy of SciencesInstitute of Experimental Physics of the Slovak Academy of SciencesKTO Karatay UniversityUniversity of Applied Sciences WormsUniversity of JyväskyläJeonbuk National UniversityCalifornia Polytechnic State UniversitySuranaree University of TechnologyAGH University of KrakowNational Centre for Nuclear ResearchUniversity of South-Eastern NorwayChina Institute of Atomic EnergyPusan National UniversityFudan UniversityFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicIstituto Nazionale di Fisica Nucleare, Sezione di Roma IComenius University BratislavaChungbuk National UniversityHiroshima UniversityBudker Institute of Nuclear PhysicsUniversity of RajasthanHelsinki Institute of PhysicsUniversity of MessinaInstitute of Physics, BhubaneshwarUniversity of TübingenNara Women's UniversityUniversity of Science and Technology of ChinaNational Academy of Sciences of UkraineBogolyubov Institute for Theoretical PhysicsUniversity of the Witwatersrand

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions

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