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Title: Neutral Higgs-pair production at linear colliders within the general two-Higgs-doublet model: Quantum effects and triple Higgs boson self-interactions

Abstract

The pairwise production of neutral Higgs bosons (h{sup 0}A{sup 0},H{sup 0}A{sup 0}) is analyzed in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). The corresponding cross sections are computed at the one-loop level, including the full set of contributions at order O({alpha}{sub ew}{sup 3}) together with the leading O({alpha}{sub ew}{sup 4}) terms, in full compliance with the current phenomenological bounds and the stringent theoretical constraints inherent to the consistency of the model. We uncover regions across the 2HDM parameter space, mainly for low tan{beta}{approx}1 and moderate--and negative--values of the relevant {lambda}{sub 5} parameter, wherein the radiative corrections to the Higgs-pair production cross section, {sigma}(e{sup +}e{sup -{yields}}A{sup 0}h{sup 0}/A{sup 0}H{sup 0}), can comfortably reach |{delta}{sigma}|/{sigma}{approx}50%. This behavior can be traced back to the enhancement capabilities of the trilinear Higgs self-interactions--a trademark feature of the 2HDM, with no counterpart in the minimal supersymmetric standard model (MSSM). The corrections are strongly dependent on the actual value of {lambda}{sub 5} as well as on the Higgs mass spectrum. Interestingly enough, the quantum effects are positive for energies around {radical}(s){approx_equal}500 GeV, thereby producing a significant enhancement in the expected number of events precisely aroundmore » the fiducial startup energy of the ILC. The Higgs-pair production rates can be substantial, typically a few tens of femtobarn, therefore amounting to a few thousand events per 500 fb{sup -1} of integrated luminosity. In contrast, the corrections are negative in the highest energy range (viz. {radical}(s){approx}1 TeV and above). We conclude that a precise measurement of the 2H final states could carry unambiguous footprints of an extended (nonsupersymmetric) Higgs sector. Finally, to better assess the scope of these effects, we compare the exclusive pairwise production of Higgs bosons with the inclusive gauge boson fusion channels leading to 2H+X final states, and also with the exclusive triple Higgs boson production. We find that these multiparticle final states can be highly complementary in the overall Higgs bosons search strategy.« less

Authors:
;  [1]
  1. High Energy Physics Group, Department ECM, and Institut de Ciencies del Cosmos Universitat de Barcelona, Avinguda Diagonal 647, E-08028 Barcelona, Catalonia (Spain)
Publication Date:
OSTI Identifier:
21409148
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.81.033003; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPARATIVE EVALUATIONS; CROSS SECTIONS; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; LINEAR COLLIDERS; LUMINOSITY; MASS SPECTRA; PAIR PRODUCTION; RADIATIVE CORRECTIONS; STANDARD MODEL; SUPERSYMMETRY; TEV RANGE; ACCELERATORS; BOSONS; CORRECTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; EVALUATION; FIELD THEORIES; GRAND UNIFIED THEORY; INTERACTIONS; LINEAR ACCELERATORS; MATHEMATICAL MODELS; OPTICAL PROPERTIES; PARTICLE MODELS; PARTICLE PRODUCTION; PHYSICAL PROPERTIES; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SPECTRA; SYMMETRY; UNIFIED GAUGE MODELS

Citation Formats

Lopez-Val, David, and Sola, Joan. Neutral Higgs-pair production at linear colliders within the general two-Higgs-doublet model: Quantum effects and triple Higgs boson self-interactions. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.033003.
Lopez-Val, David, & Sola, Joan. Neutral Higgs-pair production at linear colliders within the general two-Higgs-doublet model: Quantum effects and triple Higgs boson self-interactions. United States. doi:10.1103/PHYSREVD.81.033003.
Lopez-Val, David, and Sola, Joan. Mon . "Neutral Higgs-pair production at linear colliders within the general two-Higgs-doublet model: Quantum effects and triple Higgs boson self-interactions". United States. doi:10.1103/PHYSREVD.81.033003.
@article{osti_21409148,
title = {Neutral Higgs-pair production at linear colliders within the general two-Higgs-doublet model: Quantum effects and triple Higgs boson self-interactions},
author = {Lopez-Val, David and Sola, Joan},
abstractNote = {The pairwise production of neutral Higgs bosons (h{sup 0}A{sup 0},H{sup 0}A{sup 0}) is analyzed in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). The corresponding cross sections are computed at the one-loop level, including the full set of contributions at order O({alpha}{sub ew}{sup 3}) together with the leading O({alpha}{sub ew}{sup 4}) terms, in full compliance with the current phenomenological bounds and the stringent theoretical constraints inherent to the consistency of the model. We uncover regions across the 2HDM parameter space, mainly for low tan{beta}{approx}1 and moderate--and negative--values of the relevant {lambda}{sub 5} parameter, wherein the radiative corrections to the Higgs-pair production cross section, {sigma}(e{sup +}e{sup -{yields}}A{sup 0}h{sup 0}/A{sup 0}H{sup 0}), can comfortably reach |{delta}{sigma}|/{sigma}{approx}50%. This behavior can be traced back to the enhancement capabilities of the trilinear Higgs self-interactions--a trademark feature of the 2HDM, with no counterpart in the minimal supersymmetric standard model (MSSM). The corrections are strongly dependent on the actual value of {lambda}{sub 5} as well as on the Higgs mass spectrum. Interestingly enough, the quantum effects are positive for energies around {radical}(s){approx_equal}500 GeV, thereby producing a significant enhancement in the expected number of events precisely around the fiducial startup energy of the ILC. The Higgs-pair production rates can be substantial, typically a few tens of femtobarn, therefore amounting to a few thousand events per 500 fb{sup -1} of integrated luminosity. In contrast, the corrections are negative in the highest energy range (viz. {radical}(s){approx}1 TeV and above). We conclude that a precise measurement of the 2H final states could carry unambiguous footprints of an extended (nonsupersymmetric) Higgs sector. Finally, to better assess the scope of these effects, we compare the exclusive pairwise production of Higgs bosons with the inclusive gauge boson fusion channels leading to 2H+X final states, and also with the exclusive triple Higgs boson production. We find that these multiparticle final states can be highly complementary in the overall Higgs bosons search strategy.},
doi = {10.1103/PHYSREVD.81.033003},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 3,
volume = 81,
place = {United States},
year = {2010},
month = {2}
}