A universally enhanced light-quarks Yukawa couplings paradigm

Abstract

We propose that natural TeV-scale new physics (NP) with $\mathcal{O}(1)$ couplings to the standard model (SM) quarks may lead to a universal enhancement of the Yukawa couplings of all the light quarks, perhaps to a size comparable to that of the SM b-quark Yukawa coupling, i.e., $y_q\sim \mathcal{O}(y_b^{SM})$ for $q=u,d,c,s$. This scenario is described within an effective field theory (EFT) extension of the SM, for which a potential contribution of certain dimension six effective operators to the light quarks Yukawa couplings is $y_q\sim \mathcal{O}\left(f\frac{v^2}{{\Lambda }^2}\right)$, where $v$ is the Higgs vacuum expectation value (VEV), $v=246$ GeV, $\Lambda$ is the typical scale of the underlying heavy NP and $f$ is the corresponding Wilson coefficient which depends on its properties and details. In particular, we study the case of $y_q\sim 0.025\sim y_b^{SM}$, which is the typical size of the enhanced light-quark Yukawa couplings if the NP scale is around $\Lambda \sim 1.5$ TeV and the NP couplings are natural, i.e., $f\sim \mathcal{O}(1)$. We also explore this enhanced light quarks Yukawa paradigm in extensions of the SM which contain TeV-scale vector-like quarks and we match them to the specific higher dimensional effective operators in the EFT description. We discuss the constraints on this scenario and the flavor structure of the underlying NP dynamics and suggest some resulting "smoking gun" signals that should be searched for at the LHC, such as multi-Higgs production $pp\to hh,hhh$ and single Higgs production in association with a high $p_T$ jet ($j$) or photon $pp\to hj,h\gamma$ and with a single top-quark $pp\to ht$.

arXiv comment12 pages, 2 figures, 2 tables

References in corpus (66)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Little Higgs Review
• The Anatomy of Electro-Weak Symmetry Breaking. I: The Higgs boson in the Standard Model
• Neutral Higgs-Boson Pair Production at Hadron Colliders: QCD Corrections
• A handbook of vector-like quarks: mixing and single production
• Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD
• Higgs boson pair production in gluon fusion at NLO with full top-quark mass dependence
• Flavour-Changing Decays of a 125 GeV Higgs-like Particle
• Full top quark mass dependence in Higgs boson pair production at NLO
• Observable contributions of new exotic quarks to quark mixing
• Effects of mixing with quark singlets
• Very boosted Higgs in gluon fusion
• Higgs Boson Mass, Sparticle Spectrum and Little Hierarchy Problem in Extended MSSM
• Evidence for the $H\to b\bar{b}$ decay with the ATLAS detector
• Patterns of Flavour Violation in Models with Vector-Like Quarks
• A Higgs Conundrum with Vector Fermions
• An Exclusive Window onto Higgs Yukawa Couplings
• Higgs boson pair production: top quark mass effects at NLO and NNLO
• Constraints on top couplings in models with exotic quarks
• Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector
• Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
• New Vector-Like Fermions and Flavor Physics
• Light Higgs and Vector-like Quarks without Prejudice
• Constraining Light-Quark Yukawa Couplings from Higgs Distributions
• A Little Solution to the Little Hierarchy Problem: A Vector-like Generation
• Enhanced di-Higgs Production through Light Colored Scalars
• Higgs boson pair production in new physics models at hadron, lepton, and photon colliders
• Constraining the Charm Yukawa and Higgs-quark Coupling Universality
• What's in the Loop? The Anatomy of Double Higgs Production
• Single top and Higgs associated production as a probe of the Htt coupling sign at the LHC
• Top- and bottom-mass effects in hadronic Higgs production at small transverse momenta through LO+NLL
• Vector-like Fermions and Higgs Effective Field Theory Revisited
• On the two-loop virtual QCD corrections to Higgs boson pair production in the Standard Model
• Prospects for measuring the Higgs coupling to light quarks
• Modified Higgs Physics from Composite Light Flavors
• Light quark Yukawa couplings from Higgs kinematics
• Resolving the Higgs-Gluon Coupling with Jets
• A "Vector-like chiral" fourth family to explain muon anomalies
• Constraining models with vector-like fermions from FCNC in K and B physics
• Gluon-fusion Higgs production in the Standard Model Effective Field Theory
• Search for the flavor-changing neutral current interactions of the top quark and the Higgs boson which decays into a pair of b quarks at $\sqrt{s}=$ 13 TeV
• New-physics signals of a model with a vector-singlet up-type quark
• The Hunt for New Physics in the Flavour Sector with up vector-like quarks
• Light Non-degenerate Composite Partners at the LHC
• Top Partners and Higgs Boson Production
• Search for top quark decays $t\to qH$, with $H\to \gamma \gamma$, in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Phenomenology of Enhanced Light Quark Yukawa Couplings and the $W^{\pm }h$ Charge Asymmetry
• Probing Higgs boson couplings in H+$\gamma$ production at the LHC
• Higgs Boson Production in Association with a Photon in Vector Boson Fusion at the LHC
• Small violations of unitarity, the phase in Bs mixing and visible t->cZ decays at the LHC
• Higgs production in heavy quark annihilation through next-to-next-to-leading order QCD
• Constraining Composite Higgs Models using LHC data
• Vector-like quarks coupling discrimination at the LHC and future hadron colliders
• The size of chi = arg (-Vts Vtb* Vcs* Vcb) and physics beyond the Standard Model
• Vector-like Quarks at the Origin of Light Quark Masses and Mixing
• New Physics Scale from Higgs Observables with Effective Dimension-6 Operators
• Higgs-photon associated production at hadron colliders
• Asking for an extra photon in Higgs production at the LHC and beyond
• Higgs boson couplings: measurements and theoretical interpretation
• Light-quarks Yukawa couplings and new physics in exclusive high-$p_T$ Higgs + jet and Higgs + $b$-jet events
• Flavor-changing interactions with singlet quarks and their implications for the LHC
• Higgs-photon resonances
• Numerical multi-loop calculations: tools and applications
• The discrete charm of flavour and CP violation

Cited by in corpus (16)

• Aligned and Spontaneous Flavor Violation
• Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
• Enhancing Scalar Productions with Leptoquarks at the LHC
• Probing Higgs couplings to light quarks via Higgs pair production
• Cancellation in Dark Matter-Nucleon Interactions: the Role of Non-Standard-Model-like Yukawa Couplings
• Measurements of $WH$ and $ZH$ production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in $13\mathrm{TeV}$ $pp$ collisions with the ATLAS detector
• Machine learning the trilinear and light-quark Yukawa couplings from Higgs pair kinematic shapes
• Phenomenology of TeV-scale scalar Leptoquarks in the EFT
• A new solution of the fermionic mass hierarchy of the standard model
• Multi-Higgs Production Probes Higgs Flavor
• Probing the Higgs boson through Yukawa force
• How large can the Light Quark Yukawa couplings be?
• Multi Higgs Boson Signals of a Modified Muon Yukawa Coupling at a Muon Collider
• Higgs to charm quarks in vector boson fusion plus a photon
• R-Parity Violating Supersymmetry and the 125 GeV Higgs signals
• Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders