Search for a new heavy resonance decaying to a top quark and a neutral scalar boson in proton-proton collisions at s=13TeV
Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Benato, L.; Bergauer, T.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Matthewman, M.; Schieck, J.; Schöfbeck, R.; Shooshtari, M.; Sonawane, M.; Van Den Bossche, N.; Waltenberger, W.;
Abstract:
A first search at the LHC for a new heavy resonance decaying to a top quark and a neutral scalar boson 𝜙 in the
fully hadronic final state is presented, where the 𝜙 boson is identified by its decay into a bottom quark-antiquark
pair. The search is focused on final states in which the decay products of the highly Lorentz boosted top quark and
𝜙 boson are each reconstructed as a single, large-radius jet with distinct substructure. The analysis is performed
using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity
of 138 fb$^{−1}$, recorded with the CMS detector at the LHC in 2016–2018. The single production of a vector-like top
quark, T′, is used as a benchmark model for the signal process. The results of this search are combined with those
of a previous CMS search in which semileptonic decays of the top quark were used. No significant excess of data
is observed with respect to the background prediction. For the case where the neutral scalar is a standard model
Higgs boson and the T′ quark width is 5% of its mass, T′ quark masses between 0.85 and 1.3 TeV are excluded
at 95% confidence level and the most stringent limits to date are set for masses above 2 TeV. ... mehr
fully hadronic final state is presented, where the 𝜙 boson is identified by its decay into a bottom quark-antiquark
pair. The search is focused on final states in which the decay products of the highly Lorentz boosted top quark and
𝜙 boson are each reconstructed as a single, large-radius jet with distinct substructure. The analysis is performed
using proton-proton collision data at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity
of 138 fb$^{−1}$, recorded with the CMS detector at the LHC in 2016–2018. The single production of a vector-like top
quark, T′, is used as a benchmark model for the signal process. The results of this search are combined with those
of a previous CMS search in which semileptonic decays of the top quark were used. No significant excess of data
is observed with respect to the background prediction. For the case where the neutral scalar is a standard model
Higgs boson and the T′ quark width is 5% of its mass, T′ quark masses between 0.85 and 1.3 TeV are excluded
at 95% confidence level and the most stringent limits to date are set for masses above 2 TeV. ... mehr
| 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 | 09.2026 |
| Sprache | Englisch |
| Identifikator | ISSN: 0370-2693, 0031-9163, 1873-2410, 1873-2445 KITopen-ID: 1000197683 |
| Erschienen in | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Verlag | North-Holland Publishing |
| Band | 880 |
| Seiten | Art.-Nr.: 140812 |
| Vorab online veröffentlicht am | 18.08.2026 |
| Externe Relationen | Siehe auch |
| Nachgewiesen in | Scopus OpenAlex |