Search for a new pseudoscalar decaying into a pair of muons in events with a top-quark pair at√s=13 TeV with the ATLAS detector


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Aad G., Abbott B., Abeling K., Abicht N. J., Abidi S. H., Aboulhorma A., ...Daha Fazla

PHYSICAL REVIEW D, cilt.108, sa.9, 2023 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 108 Sayı: 9
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1103/physrevd.108.092007
  • Dergi Adı: PHYSICAL REVIEW D
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH
  • Ankara Üniversitesi Adresli: Evet

Özet

A search for a new pseudoscalar a-boson produced in events with a top-quark pair, where the a-boson decays into a pair of muons, is performed using root s=13 TeV pp collision data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb(-1). The search targets the final state where only one top quark decays to an electron or muon, resulting in a signature with three leptons e mu mu and mu mu mu. No significant excess of events above the Standard Model expectation is observed and upper limits are set on two signal models: pp -> tta and pp -> tt with t -> H(perpendicular to)b, H-perpendicular to -> W(perpendicular to)a, where a ->mu mu, in the mass ranges 15 GeV