Näytä suppeat kuvailutiedot

dc.contributor.authorALICE Collaboration
dc.date.accessioned2022-03-03T10:21:21Z
dc.date.available2022-03-03T10:21:21Z
dc.date.issued2022
dc.identifier.citationALICE Collaboration. (2022). Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC. <i>Physical Review D</i>, <i>105</i>(1), Article L011103. <a href="https://doi.org/10.1103/PhysRevD.105.L011103" target="_blank">https://doi.org/10.1103/PhysRevD.105.L011103</a>
dc.identifier.otherCONVID_104482804
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/80063
dc.description.abstractRecent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, Ds+, Λc+, and Ξc0, are used to evaluate the charm fragmentation fractions and production cross section per unit of rapidity at midrapidity (|y|<0.5), in pp collisions at s=5.02 TeV at the LHC. The latter is dσcc¯/dy||y|<0.5=1165±44(stat)-101+134(syst) μb. These measurements were obtained for the first time in hadronic collisions at the LHC, including the charm baryon states, recently measured by ALICE at midrapidity. The charm fragmentation fractions differ significantly from the values measured in e+e- and ep collisions, providing evidence of the dependence of the parton-to-hadron fragmentation fractions on the collision system, indicating that the assumption of their universality is not supported by the measured cross sections. An increase of a factor of about 3.3 for the fragmentation fraction for the Λc+ with a significance of 5σ between the values obtained in pp collisions and those obtained in e+e- (ep) collisions is reported. The fragmentation fraction for the Ξc0 was obtained for the first time in any collision system. The measured fragmentation fractions were used to update the cc¯ cross sections per unit of rapidity at |y|<0.5 at s=2.76 and 7 TeV, which are about 40% higher than the previously published results. The data were compared with perturbative-QCD calculations and lie at the upper edge of the theoretical bands.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review D
dc.rightsCC BY 4.0
dc.titleCharm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC
dc.typeresearch article
dc.identifier.urnURN:NBN:fi:jyu-202203031778
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn2470-0010
dc.relation.numberinseries1
dc.relation.volume105
dc.type.versionpublishedVersion
dc.rights.copyright© 2022 CERN, for the ALICE Collaboration
dc.rights.accesslevelopenAccessfi
dc.type.publicationarticle
dc.subject.ysokvanttiväridynamiikka
dc.subject.ysohiukkasfysiikka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p39318
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevD.105.L011103
dc.type.okmA1


Aineistoon kuuluvat tiedostot

Thumbnail

Aineisto kuuluu seuraaviin kokoelmiin

Näytä suppeat kuvailutiedot

CC BY 4.0
Ellei muuten mainita, aineiston lisenssi on CC BY 4.0