First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV

Simple item page
dc.citation.articleNumber136565en_US
dc.citation.journalTitlePhysics Letters Ben_US
dc.citation.volumeNumber820en_US
dc.contributor.authorThe CMS collaborationen_US
dc.date.accessioned2021-09-21T15:37:33Zen_US
dc.date.available2021-09-21T15:37:33Zen_US
dc.date.issued2021en_US
dc.description.abstractThe first measurement of the inclusive cross section for top quark pairs (tt‾) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt‾ events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 41.5fb−1, recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among tt‾ events with two additional charm (tt‾cc‾), bottom (tt‾bb‾), and light-flavour or gluon (tt‾LL) jets. By means of a template fitting procedure, the inclusive tt‾cc‾, tt‾bb‾, and tt‾LL cross sections are simultaneously measured, together with their ratios to the inclusive tt‾ + two jets cross section. This provides measurements of the tt‾cc‾ and tt‾bb‾ cross sections of 10.1±1.2(stat)±1.4(syst)pb and 4.54±0.35(stat)±0.56(syst)pb, respectively, in the full phase space. The results are compared and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation.en_US
dc.identifier.citationThe CMS collaboration. "First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV." <i>Physics Letters B,</i> 820, (2021) Elsevier: https://doi.org/10.1016/j.physletb.2021.136565.en_US
dc.identifier.digital1-s2-0-S0370269321005050-mainen_US
dc.identifier.doihttps://doi.org/10.1016/j.physletb.2021.136565en_US
dc.identifier.urihttps://hdl.handle.net/1911/111363en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/).en_US
dc.titleFirst measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeVen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2-0-S0370269321005050-main.pdf
Size:
3.6 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Physics and Astronomy Publications