1998/05/14 by M. A. Doncheski, R. W. Robinett
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/s0370-2693(98)00807-7
published as Phys.Lett. B435 (1998) 364-372 · 18 pages (LaTeX) plus 5 postscript figures
arxiv created 1998/05/14 · openalex publication_date 1998/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Standard radiation zeros arise from the factorization properties of tree-level amplitudes involving a massless photon and can occur when all charged particles in the initial and final state have the same sign. We investigate how several different processes involving new scalar particles beyond the standard model may exhibit radiation zeros and how this structure might be exploited to probe their electromagnetic structure. We focus on (i) unnoticed aspects of angular zeros in the process e- + e- --> Delta-- + gamma for doubly charged Higgs boson (or any bilepton) production and (ii) the process gamma + e- --> q + S/V for scalar (S) or vector (V) leptoquarks (LQs). We also discuss how factorized amplitudes and radiation zeros may appear in the gauge boson fusion production of non-conjugate leptoquark pairs via gamma + W --> Si + Sj* in high energy ee reactions and how the zeros affect the production cross-sections for various types of scalar leptoquarks.