scholarly journals Probing anomalous tqh couplings via single top production in associated with the Higgs boson at the HE-LHC and FCC-hh

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
Yan-Ju Zhang ◽  
Jie-Fen Shen
Keyword(s):  
Higgs Boson ◽  
Top Quark ◽  
Decay Channel ◽  
Neutral Current ◽  
Hadron Collider ◽  
High Energy ◽  
Branching Ratios ◽  
Single Top ◽  
Upper Limits ◽  
Integrated Luminosity

AbstractWe investigate the prospects for discovering the Flavour Changing Neutral Current (FCNC) tqh couplings via the process $$pp\rightarrow th$$ p p → t h at the proposed High Energy Large Hadron Collider (HE-LHC) and Future Circular Collider in hadron-hadron mode (FCC-hh) including the realistic detector effects. The relevant SM backgrounds are considered in the cut based analysis to obtain the limits on the the branching ratios of $$t\rightarrow qh~(q=u,c)$$ t → q h ( q = u , c ) , followed by the leptonic decay channel of the top quark and diphoton decay channel of the Higgs boson. The upper limits on the FCNC branching ratios at 95% confidence level (CL) and the $$5\sigma $$ 5 σ discovery reach for the different integrated luminosities are obtained. It is shown that at the 27 TeV HE-LHC with an integrated luminosity of 15 ab$$^{-1}$$ - 1 and at the 100 TeV FCC-hh with an integrated luminosity of 30 ab$$^{-1}$$ - 1 , the BR($$t\rightarrow uh$$ t → u h ) (BR($$t\rightarrow ch$$ t → c h )) can be probed, respectively, to $$4.4~(6.4)\times 10^{-5}$$ 4.4 ( 6.4 ) × 10 - 5 and $$1.3~(1.6) \times 10^{-5}$$ 1.3 ( 1.6 ) × 10 - 5 at the 95% CL.

scholarly journals ASSOCIATED PRODUCTION OF THE CHARGED HIGGS BOSON AND SINGLE TOP QUARK AT THE LHC

2009 ◽  
Vol 24 (02) ◽  
pp. 143-150 ◽  
Author(s):  
YAO-BEI LIU ◽  
JIE-FEN SHEN
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Top Quark ◽  
Production Cross ◽  
Hadron Collider ◽  
Charged Higgs Boson ◽  
Cern Large Hadron Collider ◽  
Associated Production ◽  
Single Top ◽  
Charged Higgs

The left–right twin Higgs (LRTH) model predicts the existence of the charged Higgs ϕ±. In this paper, we study the production of the charged Higgs boson ϕ- with single top quark via the process bg → tϕ- at the CERN Large Hadron Collider (LHC). The numerical results show that the production cross-section can reach the level of 10 pb in the reasonable parameter space of the LRTH model. We expect that, as long as it is not too heavy, the possible signatures of the heavy charged Higgs boson ϕ-> might be detected via the decay mode [Formula: see text] at the LHC experiments.

scholarly journals Flavor-changing decay h → τ μ at super hadron colliders

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
M.A. Arroyo-Ureña ◽  
T.A. Valencia-Pérez ◽  
R. Gaitán ◽  
J.H. Montes de Oca Y ◽  
A. Fernández-Téllez
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Hadron Collider ◽  
High Energy ◽  
Model Parameters ◽  
Hadron Colliders ◽  
High Luminosity ◽  
Flavor Changing ◽  
Signal Significance ◽  
Integrated Luminosity

Abstract We study the flavor-changing decay h → τ μ with τ = τ− +τ+ and μ = μ− +μ+ of a Higgs boson at future hadron colliders, namely: a) High Luminosity Large Hadron Collider, b) High Energy Large Hadron Collider and c) Future hadron-hadron Circular Collider. The theoretical framework adopted is the Two-Higgs-Doublet Model type III. The free model parameters involved in the calculation are constrained through Higgs boson data, Lepton Flavor Violating processes and the muon anomalous magnetic dipole moment; later they are used to analyze the branching ratio of the decay h → τ μ and to evaluate the gg → h production cross section. We find that at the Large Hadron Collider is not possible to claim for evidence of the decay h → τ μ achieving a signal significance about of 1.46σ by considering its final integrated luminosity, 300 fb−1. More promising results arise at the High Luminosity Large Hadron Collider in which a prediction of 4.6σ when an integrated luminosity of 3 ab−1 and tan β = 8 are achieved. Meanwhile, at the High Energy Large Hadron Collider (Future hadron-hadron Circular Collider) a potential discovery could be claimed with a signal significance around 5.04σ (5.43σ) for an integrated luminosity of 3 ab−1 and tan β = 8 (5 ab−1 and tan β = 4).

scholarly journals Top FCNC searches at HL-LHC with the CMS experiment

2018 ◽  
Vol 191 ◽  
pp. 02009 ◽  
Author(s):  
Petr Mandrik ◽  
Keyword(s):  
Cross Sections ◽  
Top Quark ◽  
Neutral Current ◽  
Hadron Collider ◽  
Particle Accelerator ◽  
Centre Of Mass ◽  
Mass Energy ◽  
Flavor Change Neutral Current ◽  
Cms Experiment ◽  
Integrated Luminosity

The Large Hadron Collider is the world’s largest and highest centerof- mass energy particle accelerator. During the Phase I operation it is expected that the LHC operated at a centre-of-mass energy of 13 TeV will deliver to the CMS experiment total integrated luminosity of ~300 fb-1 till 2023. The High Luminosity LHC upgrade is expected to run at a centre-of-mass energy of 14 TeV and will allow ATLAS and CMS to collect integrated luminosities of the order of 300 fb-1 per year, and up to 3000 fb-1 during the HL-LHC projected lifetime of ten years. The large expected integrated luminosity enables the exploration of the multi-TeV scale by searches for particles with high masses as well as by investigation of processes with very low cross sections such as Flavor-Change Neutral Current interactions in top quark sector. In this report we present a proposal for the top quark FCNC searches at HL-LHC based on Monte-Carlo simulation of the upgraded CMS detector.

scholarly journals Implementation and analysis of quantum computing application to Higgs boson reconstruction at the large Hadron Collider

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anthony Alexiades Armenakas ◽  
Oliver K. Baker
Keyword(s):  
Quantum Computing ◽  
Higgs Boson ◽  
Large Hadron Collider ◽  
High Efficiency ◽  
Decay Channel ◽  
Hadron Collider ◽  
High Energy ◽  
Quantum Computers ◽  
Quantum Search ◽  
Four Leptons

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.

scholarly journals Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Henning Bahl ◽  
Philip Bechtle ◽  
Sven Heinemeyer ◽  
Judith Katzy ◽  
Tobias Klingl ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Top Quark ◽  
Decay Channel ◽  
New Physics ◽  
Current Data ◽  
Quark Interaction ◽  
The Standard Model ◽  
Vector Bosons ◽  
Selection Of

Abstract The $$ \mathcal{CP} $$ CP structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $$ \mathcal{CP} $$ CP -nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $$ \mathcal{CP} $$ CP -odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $$ \mathcal{CP} $$ CP properties of this coupling with future LHC data by determining tH production rates independently from possible accompanying variations of the $$ t\overline{t}H $$ t t ¯ H rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for tH production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone.

scholarly journals TOP AND HIGGS PHYSICS AT THE HADRON COLLIDERS

2013 ◽  
Vol 28 (26) ◽  
pp. 1330038 ◽  
Author(s):  
SHABNAM JABEEN
Keyword(s):  
Top Quark ◽  
Hadron Collider ◽  
Center Of Mass ◽  
Charge Asymmetry ◽  
Mass Energy ◽  
Top Quark Mass ◽  
Proton Antiproton ◽  
Proton Proton ◽  
Center Of Mass Energy ◽  
Single Top

This review summarizes the recent results for top quark and Higgs boson measurements from experiments at Tevatron, a proton–antiproton collider at a center-of-mass energy of [Formula: see text], and the Large Hadron Collider, a proton–proton collider at a center-of-mass energy of [Formula: see text]. These results include the discovery of a Higgs-like boson and measurement of its various properties, and measurements in the top quark sector, e.g. top quark mass, spin, charge asymmetry and production of single top quark.

Sign in / Sign up

Export Citation Format

Share Document