Search for new physics using effective field theory in 13 TeV pp collision events that contain a top quark pair and a boosted Z or Higgs boson
Yazarlar (1)
Prof. Dr. Hasan OĞUL Sinop Üniversitesi, Türkiye
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Physical Review D (Q1) | ||
| Dergi ISSN | 2470-0010 Dergi Bilgileri (2023) | ||
| Makale Dili | İngilizce | Basım Tarihi | 08-2023 |
| Cilt / Sayı / Sayfa | 108 / 3 / 1–35 | DOI | 10.1103/PhysRevD.108.032008 |
| Makale Linki | http://www.scopus.com/inward/record.url?eid=2-s2.0-85174048476&partnerID=MN8TOARS | ||
| UAK Araştırma Alanları |
Fen Bilimleri ve Matematik
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| Özet |
| A data sample containing top quark pairs (tt) produced in association with a Lorentz-boosted Z or Higgs boson is used to search for signs of new physics using effective field theory. The data correspond to an integrated luminosity of 138 fb-1 of proton-proton collisions produced at a center-of-mass energy of 13 TeV at the LHC and collected by the CMS experiment. Selected events contain a single lepton and hadronic jets, including two identified with the decay of bottom quarks, plus an additional large-radius jet with high transverse momentum identified as a Z or Higgs boson decaying to a bottom quark pair. Machine learning techniques are employed to discriminate between tt Z or tt H events and events from background processes, which are dominated by tt+ jets production. No indications of new physics are observed. The signal strengths of boosted tt Z and tt H production are measured, and upper limits are placed on the tt Z and tt H differential cross sections as functions of the Z or Higgs boson transverse momentum. The effects of new physics are probed using a framework in which the standard model is considered to be the low-energy effective field theory of a higher energy scale theory. Eight possible dimension-six operators are added to the standard model Lagrangian, and their corresponding coefficients are constrained via fits to the data. |
| Anahtar Kelimeler |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 9 |
| Scopus | 18 |
| Google Scholar | 38 |