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Search for heavy neutral Higgs bosons A and H in the t$\overline{t}$Z channel in proton-proton collisions at 13 TeV

Hayrapetyan, A. ; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; Schöfbeck, R.; Schwarz, D.; Sonawane, M.; ... mehr

Abstract:

A direct search for new heavy neutral Higgs bosons A and H in the tt Z channel is presented, targeting the process pp → A → ZH with H → t$\overline{t}$ . For the first time, the channel with decays of the Z boson to muons or electrons in association with all-hadronic decays of the t$\overline{t}$ system is targeted. The analysis uses proton-proton collision data collected at the CERN LHC with the CMS experiment at √𝑠 = 13 TeV, which correspond to an integrated luminosity of 138 fb$^{−1}$. No signal is observed. Upper limits on the product of the cross section and branching fractions are derived for narrow resonances A and H with masses up to 2100 and 2000 GeV, respectively, assuming A boson production through gluon fusion. The results are also interpreted within two-Higgs-doublet models, where A and H are CP-odd and CP-even states, respectively, complementing and substantially extending the reach of previous searches.


Verlagsausgabe §
DOI: 10.5445/IR/1000185679
Veröffentlicht am 13.10.2025
Originalveröffentlichung
DOI: 10.1016/j.physletb.2025.139568
Scopus
Zitationen: 1
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Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2025
Sprache Englisch
Identifikator ISSN: 0370-2693
KITopen-ID: 1000185679
Erschienen in Physics Letters B
Verlag North-Holland Publishing
Band 866
Seiten Art.-Nr.: 139568
Vorab online veröffentlicht am 13.05.2025
Nachgewiesen in OpenAlex
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Scopus
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