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Measurement of the cross section for tt̅ production with additional jets and b jets in pp collisions at √s= 13 TeV

CMS Collaboration; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Rad, N.; Schieck, J.; Schöfbeck, R.; Spanring, M.; ... mehr

Abstract:
Measurements of the cross section for the production of top quark pairs in association with a pair of jets from bottom quarks (σ$_{tt̅bb̅}$) and in association with a pair of jets from quarks of any flavor or gluons (σ$_{tt̅jj}$) and their ratio are presented. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb$^{-1}$. The measurements are performed in a fiducial phase space and extrapolated to the full phase space, separately for the dilepton and lepton+jets channels, where lepton corresponds to either an electron or a muon. The results of the measurements in the fiducial phase space for the dilepton and lepton+jets channels, respectively, are σ$_{tt̅jj}$ = 2.36±0.02 (stat)±0.20 (syst) pb and 31.0±0.2 (stat)±2.9 (syst) pb, and for the cross section ratio 0.017 ± 0.001 (stat) ± 0.001 (syst) and 0.020 ± 0.001 (stat) ± 0.001 (syst). The values of σ$_{ tt̅bb̅ }$ are determined from the product of the σ$_{tt̅jj}$ and the cross section ratio, obtaining, respectively, 0.040±0.002 (stat)±0.005 (syst) pb and 0.62±0.03 (stat)±0.07 (syst) pb. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000122108
Veröffentlicht am 27.07.2020
Originalveröffentlichung
DOI: 10.1007/JHEP07(2020)125
Scopus
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2020
Sprache Englisch
Identifikator ISSN: 1029-8479
KITopen-ID: 1000122108
Erschienen in Journal of high energy physics
Verlag Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Band 2020
Heft 7
Seiten Article: 125
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 20.07.2020
Schlagwörter Hadron-Hadron scattering (experiments), Jets, Top physics
Nachgewiesen in Dimensions
arXiv
Scopus
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