Search for pair production of excited top quarks in the lepton + jets final state
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
Dergi ISSN 0370-2693 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 03-2018
Cilt / Sayı / Sayfa 778 / 1 / 349–370 DOI 10.1016/j.physletb.2018.01.049
Makale Linki https://www.sciencedirect.com/science/article/am/pii/S0370269318300571?via%3Dihub
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
A search is performed for the pair production of spin-3/2 excited top quarks, each decaying to a top quark and a gluon. The search uses the data collected with the CMS detector from proton–proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. Events are selected by requiring an isolated muon or electron, an imbalance in the transverse momentum, and at least six jets of which exactly two must be compatible with originating from the fragmentation of a bottom quark. No significant excess over the standard model predictions is found. A lower limit of 1.2 TeV is set at 95% confidence level on the mass of the spin-3/2 excited top quark in an extension of the Randall–Sundrum model, assuming a 100% branching fraction of its decay into a top quark and a gluon. These are the best limits to date in a search for excited top quarks and the first at 13 TeV. © 2018 The Author(s)
Anahtar Kelimeler
Beyond two generations | CMS | Excited top quark | Physics