Observation of a pseudoscalar excess at the top quark pair production threshold
Yazarlar (1)
Prof. Dr. Hasan OĞUL Sinop Üniversitesi, Türkiye
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Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Reports on progress in physics (Q1) | ||
| Makale Dili | – | Basım Tarihi | 08-2025 |
| Cilt / Sayı / Sayfa | 88 / 8 / 87801–0 | DOI | 10.1088/1361-6633/adf7d3/meta |
| Makale Linki | https://iopscience.iop.org/article/10.1088/1361-6633/adf7d3/meta | ||
| UAK Araştırma Alanları |
Nükleer Fizik
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| Özet |
| A search for resonances in top quark pair ( tt―) production in final states with two charged leptons and multiple jets is presented, based on proton–proton collision data collected by the CMS experiment at the CERN LHC at s=13TeV, corresponding to 138 fb−1. The analysis explores the invariant mass of the tt― system and two angular observables that provide direct access to the correlation of top quark and antiquark spins. A significant excess of events is observed near the kinematic tt― threshold compared to the non-resonant production predicted by fixed-order perturbative quantum chromodynamics (pQCD). The observed enhancement is consistent with the production of a color-singlet pseudoscalar ( 1S0[1] ) quasi-bound toponium state, as predicted by non-relativistic quantum chromodynamics. Using a simplified model for 1S0[1] toponium, the cross section of the excess above the pQCD prediction is … |
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BM Sürdürülebilir Kalkınma Amaçları
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| Google Scholar | 134 |