Heavy Higgs Searches: Flavour Matters

Abstract

We point out that the stringent lower bounds on the masses of additional electrically neutral and charged Higgs bosons crucially depend on the flavour structure of their Yukawa interactions. We show that these bounds can easily be evaded by the introduction of flavour-changing neutral currents in the Higgs sector. As an illustration, we study the phenomenology of a two Higgs doublet model with a Yukawa texture singling out the third family of quarks and leptons. We combine constraints from low-energy flavour physics measurements, LHC measurements of the 125 GeV Higgs boson rates, and LHC searches for new heavy Higgs bosons. We propose novel LHC searches that could be performed in the coming years to unravel the existence of these new Higgs bosons.

41 pages, 11 figures and 4 tables (v2: References added. Comment on associated production with a top quark added. Matched published version.)

References in corpus (6)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Updated NNLO QCD predictions for the weak radiative B-meson decays
• Explaining $h\to {\mu }^{\pm }{\tau }^{\mp }$, $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}/B\to K{e}^{+}{e}^{-}$ in a two-Higgs-doublet model with gauged $L_{\mu }-L_{\tau }$
• Electroweak Baryogenesis with Lepton Flavor Violation
• Challenges and opportunities for heavy scalar searches in the $t\bar{t}$ channel at the LHC
• Michel parameters for $\tau$ decays $\tau \to l\nu \bar{\nu }(l=e,\mu )$ in a general two Higgs doublet model with $\mu -\tau$ flavor violation

Cited by in corpus (25)

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• The Weak Scale as a Trigger
• $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ and neutrino mass in the 2HDM-III with right-handed neutrinos
• 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
• Rare Top Decays as Probes of Flavorful Higgs Bosons
• Sub-TeV $H^{+}$ Boson Production as Probe of Extra Top Yukawa Couplings
• Probing Electroweak Baryogenesis induced by extra bottom Yukawa coupling via EDMs and collider signatures
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• Muon $g-2$ in a $U(1)$-symmetric Two-Higgs-Doublet Model
• The $tZH$ and $tZh$ production in 2HDM: Prospects for discovery at the LHC
• Coup de grace to the charged Higgs solution of $P_5^{\prime }$ and $R_{D^{(\ast )}}$ discrepancies
• Flavorful Two Higgs Doublet Models with a Twist
• Cornering Spontaneous CP Violation with Charged-Higgs Searches
• Flavour-changing neutral scalar interactions of the top quark
• Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV $pp$ collisions with the ATLAS detector
• The Coming Decade of $h\to \tau \mu$ and $\tau \to \mu \gamma$ Interplay in $\tau$ Flavor Violation Search
• Radiative generation of neutrino masses in a 3-3-1 type model
• Constraints on coloured scalars from global fits
• Flavor Changing Neutral Currents in the Higgs Sector
• A Final Word on FCNC-Baryogenesis from Two Higgs Doublets
• Search for flavour-changing neutral current interactions of the top quark and the Higgs boson in events with a pair of $\tau$-leptons in pp collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• The Charged Higgs from the Bottom-Up: Probing Flavor at the LHC
• Prospect and implications of $cg\to b{H}^{+}\to bA{W}^{+}$ production at the LHC