Quantum effects on Higgsstrahlung events at linear colliders within the general twoHiggsdoublet 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 twoHiggsdoublet 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 oneloop, 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 wavefunction 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 Higgsboson selfcouplings, 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 oneloopcorrected signal (which is also highly distinctive with respect to the SM expectation for e{sup +}e{sup {yields}}Z{sup 0}H),more »
 Authors:

 High Energy Physics Group, Departament ECM, and Institut de Ciencies del Cosmos, Universitat de Barcelona, Avinguda Diagonal 647, E08028 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 05562821
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CORRECTIONS; CROSS SECTIONS; ELECTRONPOSITRON 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
LopezVal, David, Sola, Joan, Bernal, Nicolas, and Centro de Fisica Teorica de Particulas. Quantum effects on Higgsstrahlung events at linear colliders within the general twoHiggsdoublet model. United States: N. p., 2010.
Web. doi:10.1103/PHYSREVD.81.113005.
LopezVal, David, Sola, Joan, Bernal, Nicolas, & Centro de Fisica Teorica de Particulas. Quantum effects on Higgsstrahlung events at linear colliders within the general twoHiggsdoublet model. United States. doi:10.1103/PHYSREVD.81.113005.
LopezVal, David, Sola, Joan, Bernal, Nicolas, and Centro de Fisica Teorica de Particulas. Tue .
"Quantum effects on Higgsstrahlung events at linear colliders within the general twoHiggsdoublet model". United States. doi:10.1103/PHYSREVD.81.113005.
@article{osti_21407941,
title = {Quantum effects on Higgsstrahlung events at linear colliders within the general twoHiggsdoublet model},
author = {LopezVal, 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 twoHiggsdoublet 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 oneloop, 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 wavefunction 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 Higgsboson selfcouplings, 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 oneloopcorrected signal (which is also highly distinctive with respect to the SM expectation for e{sup +}e{sup {yields}}Z{sup 0}H), the predicted Higgsstrahlung 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 Higgsstrahlung events (h{sup 0}Z{sup 0}, H{sup 0}Z{sup 0}) and the previously computed oneloop Higgspair 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 = {05562821},
number = 11,
volume = 81,
place = {United States},
year = {2010},
month = {6}
}