Sensitivity to Triple Higgs Couplings via Di-Higgs Production in the 2HDM at e+e- Colliders

Abstract

An important task at future colliders is the investigation of the Higgs-boson sector. Here the measurement of the triple Higgs coupling(s) plays a special role. Based on previous analyses, within the framework of Two Higgs Doublet Models (2HDM) type~I and~II, we define and analyze several two-dimensional benchmark planes, that are over large parts in agreement with all theoretical and experimental constraints. For these planes we evaluate di-Higgs production cross sections at future high-energy $e^{+}{e}^{-}$ colliders, such as ILC or CLIC. We consider two different channels for the neutral di-Higgs pairs $h_i{h}_j=hh,hH,HH,AA$: $e^{+}{e}^{-}\to h_i{h}_{j}Z$ and $e^{+}{e}^{-}\to h_i{h}_j\nu \bar{\nu }$. In both channels the various triple Higgs-boson couplings contribute substantially. We find regions with a strong enhancement of the production channel of two SM-like light Higgs bosons and/or with very large production cross sections involving one light and one heavy or two heavy 2HDM Higgs bosons, offering interesting prospects for the ILC or CLIC. The mechanisms leading to these enhanced production cross sections are analyzed in detail. We propose the use of cross section distributions with the invariant mass of the two final Higgs bosons where the contributions from intermediate resonant and non-resonant BSM Higgs bosons play a crucial role. We outline which process at which center-of-mass energy would be best suited to probe the corresponding triple Higgs-boson couplings.

57 pages, 29 figures, lots of plots, version published in Eur.Phys.J.C

References in corpus (8)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Higgs boson pair production in new physics models at hadron, lepton, and photon colliders
• Probing triple Higgs couplings of the Two Higgs Doublet Model at Linear Collider
• Exploring sizable triple Higgs couplings in the 2HDM
• Testing anomalous $H-W$ couplings and Higgs self-couplings via double and triple Higgs production at $e^{+}{e}^{-}$ colliders

Cited by in corpus (5)

• Benchmarking Di-Higgs Production in Various Extended Higgs Sector Models
• New constraints on extended Higgs sectors from the trilinear Higgs coupling
• Triple Higgs Couplings in the 2HDM: The Complete Picture
• Sensitivity and constraints to the 2HDM soft-breaking $Z_2$ parameter $m_{12}$
• Two Higgs doublet model fitting and $t\bar{t}b\bar{b}$ signal at the ILC