Charged Higgs-boson production in association with an electron and a neutrino at electron-positron colliders

Journal Article · Sat Mar 01 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.055004· OSTI ID:21249733

Brein, Oliver; Figy, Terrance ^[1]

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1. Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE, Durham (United Kingdom)

We present results of a calculation of the cross section for the production of a charged Higgs boson in association with an electron and a neutrino at electron-positron colliders (e{sup +}e{sup -}{yields}H{sup +}e{sup -}{nu}{sub e}, H{sup -}e{sup +}{nu}{sub e}). We study predictions for the cross section in the minimal supersymmetric standard model (MSSM) and the two Higgs doublet model (THDM), highlighting possible differences. The process is effectively loop-induced in both models. Hence, the cross section is expected to be strongly model-dependent. Most notably, due to the presence of superpartners, the MSSM amplitude contains Feynman graphs of pentagon-type, which are not present in the THDM. This is the first complete one-loop calculation of the cross section for this process in the THDM and the MSSM. For both models, so far, only approximate results with limited ranges of validity were available. Our main aim here is to clarify several open questions in the existing literature on this process. Specifically, we will discuss the validity of the heavy fermion loop approximation in both models, and of the fermion/sfermion loop approximation in the MSSM.

• OSTI ID: 21249733
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
APPROXIMATIONS
CROSS SECTIONS
ELECTRON NEUTRINOS
ELECTRON-POSITRON COLLISIONS
ELECTRONS
FORECASTING
HIGGS BOSONS
HIGGS MODEL
PARTICLE PRODUCTION
POSITRONS
STANDARD MODEL
SUPERSYMMETRY