Results 11 to 20 of about 10,949 (187)

Observation of four top quark production in proton-proton collisions at s=13TeV

open access: yesPhysics Letters B, 2023
The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated ...
A. Hayrapetyan   +2361 more
doaj   +1 more source

Polarization of top quark in vector-like quark decay

open access: yesPhysics Letters B, 2019
Vector-like quarks (VLQs) are attractive extensions to the Standard Model. They mix with the SM quarks and can lead to rich phenomenology. Determination of VLQ's interaction structure with the SM is then an important issue, which can be inferred from the
Hang Zhou, Ning Liu
doaj   +1 more source

Quantum entanglement and top spin correlations in SMEFT at higher orders

open access: yesJournal of High Energy Physics, 2023
We present the first analysis of top spin polarizations, t t ¯ $$ t\overline{t} $$ spin correlations, and t t ¯ $$ t\overline{t} $$ spin entanglement at the LHC in the context of the Standard Model Effective Field Theory, that goes beyond Leading Order ...
Claudio Severi, Eleni Vryonidou
doaj   +1 more source

On the top-quark width measurement using a combination of resonant and non resonant cross sections.

open access: yesEPJ Web of Conferences, 2017
Top quark width measurement is important and complex task. Most measurements are done in assumption of the SM top quark interactions. We would like to discuss model independent way of measuring the top quark width.
Baskakov Alexey, Boos Eduard, Dudko Lev
doaj   +1 more source

Measurement of the jet mass in highly boosted $${\mathrm{t}}\overline{\mathrm{t}}$$ t t ¯ events from pp collisions at $$\sqrt{s}=8$$ s = 8 $$\,\text {TeV}$$ TeV

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
The first measurement of the jet mass $$m_{\text {jet}}$$ m jet of top quark jets produced in $${\mathrm{t}}\overline{\mathrm{t}} $$ t t ¯ events from pp collisions at $$\sqrt{s}=8$$ s = 8 $$\,\text {TeV}$$ TeV is reported for the jet with the largest ...
A. M. Sirunyan   +2230 more
doaj   +1 more source

Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using the ATLAS detector

open access: yesJournal of High Energy Physics, 2018
Measurements of differential cross sections of top quark pair production in association with jets by the ATLAS experiment at the LHC are presented. The measurements are performed as functions of the top quark transverse momentum, the transverse momentum ...
The ATLAS collaboration   +2885 more
doaj   +1 more source

Top quark physics at the LHC

open access: yesEPJ Web of Conferences, 2014
In 2011, an integrated luminosity of more than 5 fb−1 at 7 TeV has been delivered by the LHC. The measurement of the cross section in top quark pair production and in single top quark production, top quark mass, top quark properties and new physics ...
Jeong Kim Tae
doaj   +1 more source

Top-quark properties and mass measurements with the ATLAS detector

open access: yesEPJ Web of Conferences, 2018
The top quark is unique among the known quarks in that it decays before it has an opportunity to form hadronic bound states. This makes measurements of its properties particularly interesting as one can access directly the properties of a bare quark. The
Dado Tomas
doaj   +1 more source

Studying Same-Sign Top Pair Production through Top-Higgs FCNC Interactions at the HL-LHC

open access: yesAdvances in High Energy Physics, 2022
We investigate the potential of the HL-LHC for discovering new physics effects via the same-sign top pair signatures. We focus on the semileptonic (electron and muon) decay of the top quarks and study the reach for a simplified model approach where top ...
O. M. Ozsimsek, V. Ari, O. Cakir
doaj   +1 more source

Properties of the Top Quark

open access: yesUniverse
Recent measurements of the properties of the top quark at the CERN Large Hadron Collider are discussed. The results were measured for single and top quark pair production in their final states, including jets with either one or two leptons or only in ...
Andreas Jung
doaj   +1 more source

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