Conveners
Collider Precision
- Jordan Nash (Monash University)
Collider Precision: Clarendon Auditorium
- There are no conveners in this block
Collider Precision
- Peter Skands (Monash University (AU))
We will present our recent work on the first full analytic results of NNLO QCD corrections to the top-quark decay in the Standard Model by applying the optical theorem to three-loop self-energy diagrams. The results are expressed in terms of harmonic polylogarithms. We also analytically compute the decay width including the off-shell $W$ boson effect up to NNLO in QCD for the first time....
Precision measurements of the production cross-sections of W and Z boson at LHC provide important tests of perturbative QCD and information about the parton distribution functions for quarks within the proton. This talk will present extraordinarily precise double-differential measurement of the Z boson transverse momentum and rapidity at a centre-of-mass energy of 8 TeV. From these results,...
The production of four top quarks (tttt) is studied as a rare standard model process with sensitivity to new physics. The four top quark production cross section also allows investigations of virtual Higgs boson production and the top quark Yukawa coupling, EFT interpretations, and is an essential test of Quantum Chromodynamics. This presentation summarises the recent observation for four top...
This talk presents precise measurement of the properties of the Higgs boson, including its mass, total width, spin, and CP quantum number. The measurements are performed in various Higgs boson production and decay modes, as well as their combinations. Observation of deviations between these measurements and Standard Model (SM) predictions would be a sign of possible new phenomena beyond the SM.
The remarkably large dataset collected with the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to test theoretical predictions with unprecedented precision. Recent measurements of total and differential top-quark cross sections as well properties of top-quark production are presented, including new measurements of...
The event rates and kinematics of Higgs boson production and decay processes at the LHC are sensitive probes of possible new phenomena beyond the Standard Model (BSM). This talk presents precise measurements of Higgs boson production and decay rates, obtained using the full Run 2 and partial Run 3 pp collision dataset collected by the ATLAS experiment at 13 TeV and 13.6 TeV. These include...
The production of four top quarks ($t\bar{t}t\bar{t}$) is studied as a rare standard model process with sensitivity to new physics. The four top quark production cross section also allows investigations of virtual Higgs boson production and the top quark Yukawa coupling, EFT interpretations, and is an essential test of Quantum Chromodynamics. This presentation summarises the recent evidence...
During run 2 of the LHC the ATLAS and CMS experiments each collected nearly 140 inverse fb of pp collisions at sqrt(s) = 13 TeV. This data sample, in combination with advanced experimental techniques, enables searches for rare production processes that were so far inaccessible at previous experiments. Results will be presented of the searches for rare processes predicted by the Standard Model...
