scholarly journals Higgs boson decay into four leptons at NLOPS electroweak accuracy

2015 ◽  
Vol 2015 (6) ◽  
Author(s):  
Stefano Boselli ◽  
Carlo M. Carloni Calame ◽  
Guido Montagna ◽  
Oreste Nicrosini ◽  
Fulvio Piccinini
Keyword(s):  
2021 ◽  
Vol 81 (11) ◽  
Author(s):  
Ezio Maina ◽  
Giovanni Pelliccioli

AbstractInvestigating the polarization of weak bosons provides an important probe of the scalar and gauge sector of the Standard Model. This can be done in the Higgs decay to four leptons, whose Standard-Model leading-order amplitude enables to generate polarized observables from unpolarized ones via a fully-differential reweighting method. We study the $$\text {Z} $$ Z -boson polarization from the decay of a Higgs boson produced in association with two jets, both in the gluon-fusion and in the vector-boson fusion channel. We also address the possibility of extending the results of this work to higher orders in perturbation theory.


2007 ◽  
Author(s):  
Fulvio Piccinini ◽  
Carlo Michel Carloni Calame ◽  
Guido Montagna ◽  
Oreste Nicrosini ◽  
Mauro Moretti ◽  
...  
Keyword(s):  

1993 ◽  
Vol 48 (11) ◽  
pp. 5259-5263 ◽  
Author(s):  
A. Soni ◽  
R. M. Xu
Keyword(s):  

2019 ◽  
Vol 222 ◽  
pp. 01001
Author(s):  
Milos Dordevic

The most recent results of a Higgs boson production and properties from the CMS Collaboration using the LHC Run 1 and Run 2 data are reported. These include analyses of a Higgs boson decaying to a pair of photons, four leptons via Z boson pair decays and the associated production of a Higgs boson with top quark pair, predicted by the Standard Model (SM). The studies of a Higgs boson decays to a pair of bottom quarks, a pair of tau leptons and a charm quark pair are also presented. The Higgs boson production via vector boson fusion (VBF) and decaying to invisible particles is reported here as well. The analysis of a Higgs boson decay to a pair of muons is also presented. The study of a Higgs boson pair production at 13 TeV is performed as well and projections of a Higgs boson self couplings together with the couplings to other particles at the HL-LHC are made.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anthony Alexiades Armenakas ◽  
Oliver K. Baker

AbstractWith the advent of the High-Luminosity Large Hadron Collider (HL-LHC) era, high energy physics (HEP) event selection will require new approaches to rapidly and accurately analyze vast databases. The current study addresses the enormity of HEP databases in an unprecedented manner—a quantum search using Grover’s Algorithm (GA) on an unsorted database, ATLAS Open Data, from the ATLAS detector. A novel method to identify rare events at 13 TeV in CERN’s LHC using quantum computing (QC) is presented. As indicated by the Higgs boson decay channel $$H\rightarrow ZZ^*\rightarrow 4l$$ H → Z Z ∗ → 4 l , the detection of four leptons in one event may be used to reconstruct the Higgs boson and, more importantly, evince Higgs boson decay to some new phenomena, such as $$H\rightarrow ZZ_d \rightarrow 4l$$ H → Z Z d → 4 l . Searching the dataset for collisions resulting in detection of four leptons using a Jupyter Notebook, a classical simulation of GA, and several quantum computers with multiple qubits, the current application was found to make the proper selection in the unsorted dataset. Quantum search efficacy was analyzed for the incoming HL-LHC by implementing the QC method on multiple classical simulators and IBM’s quantum computers with the IBM Qiskit Open Source Software. The current QC application provides a novel, high-efficiency alternative to classical database searches, demonstrating its potential utility as a rapid and increasingly accurate search method in HEP.


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