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Title: Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model

Abstract

The associated production of neutral Higgs bosons with the Z{sup 0} gauge boson (h{sup 0}Z{sup 0}, H{sup 0}Z{sup 0}) is investigated in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). We compute the corresponding cross section for the processes e{sup +}e{sup -{yields}}Z{sup 0}h{sup 0}/Z{sup 0}H{sup 0} at one-loop, including the full set of corrections at O({alpha}{sub ew}{sup 3}) together with the leading O({alpha}{sub ew}{sup 4}) terms, in full consistency with the available theoretical and phenomenological constraints. We find that the wave-function corrections to the external Higgs fields are the dominant source of the quantum effects, which turn out to be large and negative (e.g., {delta}{sigma}/{sigma}{approx}-20%/-60%) in all the {radical}(s) range, and located predominantly in the region around tan{beta}{approx}1 and moderate values of the parameter {lambda}{sub 5} (being {lambda}{sub 5}<0). This behavior can be ultimately traced back to the enhancement potential of the triple Higgs-boson self-couplings, a trademark feature of the 2HDM with no counterpart in the Higgs sector of the minimal supersymmetric standard model. Even under this substantial depletion of the one-loop-corrected signal (which is also highly distinctive with respect to the SM expectation for e{sup +}e{sup -{yields}}Z{sup 0}H),more » the predicted Higgs-strahlung rates comfortably reach a few tens of femtobarn, which means barely {approx}10{sup 3}-10{sup 4} events per 500 fb{sup -1} of integrated luminosity. Because of their great complementarity, we argue that the combined analysis of the Higgs-strahlung events (h{sup 0}Z{sup 0}, H{sup 0}Z{sup 0}) and the previously computed one-loop Higgs-pair production processes (H{sup 0}A{sup 0}) could be instrumental to probe the structure of the Higgs sector at future linac facilities.« less

Authors:
; ;  [1]
  1. High Energy Physics Group, Departament ECM, and Institut de Ciencies del Cosmos, Universitat de Barcelona, Avinguda Diagonal 647, E-08028 Barcelona, Catalonia (Spain)
Publication Date:
OSTI Identifier:
21407941
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.81.113005; (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; CORRECTIONS; CROSS SECTIONS; ELECTRON-POSITRON COLLISIONS; HIGGS BOSONS; HIGGS MODEL; LINEAR COLLIDERS; LUMINOSITY; PAIR PRODUCTION; POTENTIALS; STANDARD MODEL; SUPERSYMMETRY; WAVE FUNCTIONS; Z NEUTRAL BOSONS; ACCELERATORS; BOSONS; COLLISIONS; ELECTRON COLLISIONS; ELEMENTARY PARTICLES; FIELD THEORIES; FUNCTIONS; GRAND UNIFIED THEORY; INTERACTIONS; INTERMEDIATE BOSONS; INTERMEDIATE VECTOR BOSONS; LINEAR ACCELERATORS; MATHEMATICAL MODELS; OPTICAL PROPERTIES; PARTICLE MODELS; PARTICLE PRODUCTION; PHYSICAL PROPERTIES; POSITRON COLLISIONS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; SYMMETRY; UNIFIED GAUGE MODELS

Citation Formats

Lopez-Val, David, Sola, Joan, Bernal, Nicolas, and Centro de Fisica Teorica de Particulas. Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.113005.
Lopez-Val, David, Sola, Joan, Bernal, Nicolas, & Centro de Fisica Teorica de Particulas. Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model. United States. doi:10.1103/PHYSREVD.81.113005.
Lopez-Val, David, Sola, Joan, Bernal, Nicolas, and Centro de Fisica Teorica de Particulas. Tue . "Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model". United States. doi:10.1103/PHYSREVD.81.113005.
@article{osti_21407941,
title = {Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model},
author = {Lopez-Val, David and Sola, Joan and Bernal, Nicolas and Centro de Fisica Teorica de Particulas},
abstractNote = {The associated production of neutral Higgs bosons with the Z{sup 0} gauge boson (h{sup 0}Z{sup 0}, H{sup 0}Z{sup 0}) is investigated in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). We compute the corresponding cross section for the processes e{sup +}e{sup -{yields}}Z{sup 0}h{sup 0}/Z{sup 0}H{sup 0} at one-loop, including the full set of corrections at O({alpha}{sub ew}{sup 3}) together with the leading O({alpha}{sub ew}{sup 4}) terms, in full consistency with the available theoretical and phenomenological constraints. We find that the wave-function corrections to the external Higgs fields are the dominant source of the quantum effects, which turn out to be large and negative (e.g., {delta}{sigma}/{sigma}{approx}-20%/-60%) in all the {radical}(s) range, and located predominantly in the region around tan{beta}{approx}1 and moderate values of the parameter {lambda}{sub 5} (being {lambda}{sub 5}<0). This behavior can be ultimately traced back to the enhancement potential of the triple Higgs-boson self-couplings, a trademark feature of the 2HDM with no counterpart in the Higgs sector of the minimal supersymmetric standard model. Even under this substantial depletion of the one-loop-corrected signal (which is also highly distinctive with respect to the SM expectation for e{sup +}e{sup -{yields}}Z{sup 0}H), the predicted Higgs-strahlung rates comfortably reach a few tens of femtobarn, which means barely {approx}10{sup 3}-10{sup 4} events per 500 fb{sup -1} of integrated luminosity. Because of their great complementarity, we argue that the combined analysis of the Higgs-strahlung events (h{sup 0}Z{sup 0}, H{sup 0}Z{sup 0}) and the previously computed one-loop Higgs-pair production processes (H{sup 0}A{sup 0}) could be instrumental to probe the structure of the Higgs sector at future linac facilities.},
doi = {10.1103/PHYSREVD.81.113005},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 81,
place = {United States},
year = {2010},
month = {6}
}