Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton–proton collisions at √s=13 TeV with the ATLAS detector

The ATLAS collaboration, A. G. Bogdanchikov, Василий Федорович Казанин, Дмитрий Александрович Максимов, Сергей Владимирович Пелеганчук, Павел Сергеевич Подберёзко, Ольга Леонардовна Резанова, Андрей Михайлович Сухарев

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

67 Цитирования (Scopus)

Аннотация

A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb- 1. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs.

Язык оригиналаанглийский
Номер статьи565
Число страниц39
ЖурналEuropean Physical Journal C
Том78
Номер выпуска7
DOI
СостояниеОпубликовано - 9 июл 2018

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