Rare Top Decays as Probes of Flavorful Higgs Bosons

Abstract

We study a version of Two Higgs Doublet Models with non-standard flavor violation in the up quark sector. We find branching ratios for the rare top decays $t\to hc$ and $t\to hu$ that are within reach of current and future colliders, while other flavor constraints from rare $B$ decays and neutral $D$ meson mixing, as well as constraints from Higgs signal strength measurements remain under control. The most prominent collider signature of the considered setup is $pp\to tH\to tt\bar{c}$, providing continued motivation to search for same-sign tops at the LHC as well as a simple framework to interpret these searches. As a byproduct of our study, we provide updated SM predictions for the rare top decays BR$(t\to hc{)}_{\text{SM}}=(4.19_{-0.80}^{+1.08}\pm 0.16)\times 10^{-15}$ and BR$(t\to hu{)}_{\text{SM}}=(3.66_{-0.70}^{+0.94}\pm 0.67)\times 10^{-17}$ with the main uncertainties coming from higher order QCD and CKM matrix elements.

arXiv comment27 pages, 3 Tables, 5 Figures

References in corpus (53)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• FLAG Review 2019
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• Flavor-phenomenology of two-Higgs-doublet models with generic Yukawa structure
• Observation of Higgs boson decay to bottom quarks
• Observation of $H\to b\bar{b}$ decays and $VH$ production with the ATLAS detector
• A perturbed lepton-specific two-Higgs-doublet model facing experimental hints for physics beyond the Standard Model
• 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
• A new evaluation of the t->cH decay width in the standard model
• 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
• Constraints on new physics from radiative $B$ decays
• Flavour Changing Higgs Couplings in a Class of Two Higgs Doublet Models
• Measurements of properties of the Higgs boson decaying to a W boson pair in pp collisions at $\sqrt{s}=$ 13 TeV
• Search for charged Higgs bosons decaying into top and bottom quarks at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Matching Conditions for $b\to s\gamma$ and $b\to sgluon$ in Extensions of the Standard Model
• Search for new phenomena in events with same-charge leptons and $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• ΔS=2 and ΔC=2 bag parameters in the SM and beyond from Nf=2+1+1 twisted-mass LQCD
• Measurements of gluon-gluon fusion and vector-boson fusion Higgs boson production cross-sections in the $H\to W{W}^{\ast }\to e\nu \mu \nu$ decay channel in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• The CLIC Potential for New Physics
• Uncovering Mass Generation Through Higgs Flavor Violation
• A Two Higgs Doublet Model for the Top Quark
• Collider Signatures of Flavorful Higgs Bosons
• Search for the Higgs boson decaying to two muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Is the Higgs Mechanism of Fermion Mass Generation a Fact? A Yukawa-less First-Two-Generation Model
• Searching for new scalar bosons via triple-top signature in $cg\to t{S}^0\to tt\bar{t}$
• Asymptotically Free Natural SUSY Twin Higgs
• 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
• Search for the Dimuon Decay of the Higgs Boson in $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Large $h\to bs$ in generic two-Higgs-doublet models
• What if the Masses of the First Two Quark Families are not Generated by the Standard Higgs?
• Search for top-quark decays $t\to Hq$ with 36 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV with the ATLAS detector
• Exploring top quark FCNC within 2HDM type III in association with flavor physics
• Creating the Fermion Mass Hierarchies with Multiple Higgs Bosons
• Color Sextet Vector Bosons and Same-Sign Top Quark Pairs at the LHC
• Constraining a Lighter Exotic Scalar via Same-sign Top
• Flavor Changing Leptonic Decays of Heavy Higgs Bosons
• Top quark FCNCs in extended Higgs sectors
• Heavy Higgs Searches: Flavour Matters
• Disentangling Mass and Mixing Hierarchies
• New Signatures of Flavor Violating Higgs Couplings
• The flavor puzzle in multi-Higgs models
• The Flavor-locked Flavorful Two Higgs Doublet Model
• Probing Lepton Flavor Violation at the 13 TeV LHC
• Controlled Flavour Changing Neutral Couplings in Two Higgs Doublet Models
• Search for the associated production of the Higgs boson and a vector boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV via Higgs boson decays to $\tau$ leptons
• Large Higgs-electron Yukawa coupling in 2HDM
• The same-sign top signature of R-parity violation
• Flavorful Two Higgs Doublet Models with a Twist
• Same-Sign Dileptons from Colored Scalars in the Flavorful Top-Coloron Model
• Collider Signals of Maximal Flavor Violation: Same-Sign Leptons from Same-Sign Tops at the Tevatron
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics

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