2007/01/31 by David Atwood, Shaouly Bar-Shalom, Amarjit Soni · 3 citations
Physics and Astronomy · #Coupling (piping) #Dark Matter and Cosmic Phenomena #Electron #Higgs boson #Lepton #Lepton number #MAJORANA #Muon #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #hep-ph
paper · pdf · doi:10.1103/physrevd.76.033004
published as Phys.Rev.D76:033004,2007 · Latex, 5 pages, 3 figures. V2 as published in PRD
arxiv created 2007/08/18 · openalex publication_date 2007/08/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A charged Higgs pair can be produced at an ee collider through a t-channel exchange of a heavy neutrino (N) via e+e^\ensuremath-\ensuremath→H+H^\ensuremath- and, if N is a Majorana particle, also via the lepton number violating (LNV) like-sign reaction e^\ifmmode±\else\textpm\fie^\ifmmode±\else\textpm\fi\ensuremath→H^\ifmmode±\else\textpm\fiH^\ifmmode±\else\textpm\fi. Assuming no a priori relation between the effective eNH+ coupling (\ensuremathξ) and light neutrino masses, we show that this interaction vertex can give a striking enhancement to these charged Higgs pair production processes. In particular, the LNV H^\ensuremath-H^\ensuremath- signal can probe N at the International Linear Collider (ILC) in the mass range 100 GeV\ensuremath\lesssimmN\ensuremath\lesssim104 TeV and with the effective mixing angle \ensuremathξ in the range 10^\ensuremath-4\ensuremath\lesssim\ensuremathξ2\ensuremath\lesssim10^\ensuremath-8---well within its perturbative unitarity bound and the \ensuremathβ\ensuremathβ_0\ensuremathν limit. The lepton number conserving e+e^\ensuremath-\ensuremath→H+H^\ensuremath- mode can be sensitive to, e.g., an O(10) TeV heavy Majorana neutrino at a 500 GeV ILC, if \ensuremathξ2\ensuremath\gtrsim0.001.