Abstract
We study the CP-conserving and CP-violating dimension-six operators of Higgs-gauge boson couplings via pp→γγ+n-jet signal process in a strongly interacting light Higgs based effective field theory framework at the center of mass energy of 100 TeV. In order to perform a simulation which includes realistic detector effects, the signal events in the existence of c¯γ, c˜γ, c¯g and c˜g Wilson coefficients and the relevant SM background events are generated in MadGraph, then passed through Pythia 8 for parton showering and finally run Delphes with FCC-hh detector card. In our analysis, we focus on the kinematic variables of the two photons in the final states of signal and relevant background processes that can reconstruct Higgs boson. We obtain constraints on the four Wilson coefficients of dimension-six operators using the transverse momentum distribution of reconstructed di-photon system with optimized kinematic cuts. The obtained 95% confidence level limits on these four Wilson coefficients including detector effects at s=100TeV with an integrated luminosity of 30 ab−1 without systematic error are at least one order or better than current experimental limits reported by ATLAS experiment. Even with δsys=2% systematic error, we find comparable limits with current experimental results.
Highlights
The particle physics has reached at a notable milestone in its history with the discovery of a scalar boson of 125 GeV in July 2012 at the LHC [1, 2]
There are two ways to prove that SM is a valid theory up to very high energy scales; i) the EW sector should be over-constrained and test the structure at the leading order (NLO) corrections level or ii) there must be direct evidence for a possible dynamic explanation of the Higgs mechanism
The elementary particles and their interactions based on the SU (3)c × SU (2)L × U (1)Y gauge symmetry are described in the Standard Model of particle physics which is a quantum field theory
Summary
The particle physics has reached at a notable milestone in its history with the discovery of a scalar boson of 125 GeV in July 2012 at the LHC [1, 2]. The precise measurement of the Higgs boson properties will give us detailed information on the Electroweak Symmetry Breaking (EWSB) mechanism of the SM and new physics effects beyond the SM. After the completion of the LHC and High-luminosity LHC physics programmes, the energy frontier collider project having potential to search for wide parameter range of new physics are needed to precisely measure the Higgs self-coupling and fully explore the dynamic of EWSB on the TeV scale. The FCC-hh is designed to provide proton-proton collisions at the 100 TeV centreof-mass energy with peak luminosity 5 × 1034 cm−2s−1 Having this high center-of-mass-energy will increase cross sections for events in the partonic level which will than result in greater sensitivity to various interesting physics processes produced involving the Higgs bosons at high transverse momentum.
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