Probe Charm Yukawa at the future $e^{-}p$ and $e^{+}{e}^{-}$ colliders

Abstract

Large Hadron Collider (LHC) has provided direct evidence of Yukawa couplings between the third generation charged fermions and the 125 GeV Higgs boson. Whether the first two generation charged fermions arise from exactly the same mechanism becomes the next interesting question. Therefore, direct measurements of charm or muon Yukawa couplings will be crucial to answering this puzzle. The charm Yukawa measurement at the LHC suffers from severe QCD background and it is extremely difficult to reach the sensitivity. In this paper, we compare the potential of probing charm Yukawa coupling at the two proposed future "Higgs Factory" experiments, the Large Hadron electron Collider (LHeC) and Circular electron positron collider (CEPC). At the LHeC, Higgs bosons will be produced via weak boson fusion and the energetic forward jet may suppress the background significantly. However, due to huge $\gamma -g$ scattering background, the potential of LHeC search is still limited. With $-80\%$ polarized electron beam of 60 GeV, the signal significance can only reach $2\sigma$ for ${\kappa }_c\simeq 1$ with a 3 ab${}^{-1}$ integrated luminosity. In comparison, measurement at the CEPC can then reach $8.0\sigma$ for ${\kappa }_c\simeq 1$ with a 2 ab${}^{-1}$ of data.

arXiv comment28 pages, 9 figures and 11 tables

References in corpus (43)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Theory and phenomenology of two-Higgs-doublet models
• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• Observation of $H\to b\bar{b}$ decays and $VH$ production with the ATLAS detector
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Observation of the Higgs boson decay to a pair of tau leptons with the CMS detector
• Higgs boson decays to quarkonia and the Hccbar coupling
• Precision Higgs Physics at CEPC
• Fully-Automated Precision Predictions for Heavy Neutrino Production Mechanisms at Hadron Colliders
• Cross-section measurements of the Higgs boson decaying into a pair of tau-leptons in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• An Exclusive Window onto Higgs Yukawa Couplings
• CEPC Conceptual Design Report: Volume 1 - Accelerator
• Exclusive Radiative Higgs Decays as Probes of Light-Quark Yukawa Couplings
• Constraining Light-Quark Yukawa Couplings from Higgs Distributions
• Search for a standard model-like Higgs boson in the mu+ mu- and e+ e- decay channels at the LHC
• Experimental constraints on the coupling of the Higgs boson to electrons
• Constraining the Charm Yukawa and Higgs-quark Coupling Universality
• Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
• Light quark Yukawa couplings from Higgs kinematics
• Scales of Fermion Mass Generation and Electroweak Symmetry Breaking
• $\gamma \gamma$ Processes at High Energy pp Colliders
• Charming the Higgs
• Search for the Higgs boson decaying to two muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Probing the Charm Yukawa Coupling in Higgs + Charm Production
• $h\to {\mu }^{+}{\mu }^{-}$ via gluon fusion at the LHC
• Higgs Decays to Muons in Weak Boson Fusion
• Search for the Dimuon Decay of the Higgs Boson in $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Higgs Boson Searches and the Hbbar Coupling at the LHeC
• Upper bound on the scale of Majorana-neutrino mass generation
• Phenomenology of Enhanced Light Quark Yukawa Couplings and the $W^{\pm }h$ Charge Asymmetry
• Higgs Boson Decay to Light Jets at the LHC
• An Indirect Handle on the Down-Quark Yukawa Coupling
• Electric dipole moment constraints on CP-violating light-quark Yukawas
• Charm-quark Yukawa Coupling in $h\to c\bar{c}\gamma$ at LHC
• Light-quarks Yukawa couplings and new physics in exclusive high-$p_T$ Higgs + jet and Higgs + $b$-jet events
• Searching for the light Higgsinos in MSSM at the future e-p colliders
• Unitarity and Bounds on the Scale of Fermion Mass Generation

Cited by in corpus (4)

• Study on the anomalous quartic $W^{+}{W}^{-}\gamma \gamma$ couplings of electroweak bosons in $e^{-}p$ collisions at the LHeC and the FCC-he
• Sensitivity physics expected to the measurement of the quartic $WW\gamma \gamma$ couplings at the LHeC and the FCC-he
• Electroweak corrections to Higgs boson production via W W fusion at the future LHeC
• Photo-production of Higgs Boson at the LHeC