Phenomenology of GeV-scale scalar portal

• Published in: The journal of high energy physics 2019-11, Vol.2019 (11), p.1-45, Article 162
• Main Authors: Boiarska, Iryna, Bondarenko, Kyrylo, Boyarsky, Alexey, Gorkavenko, Volodymyr, Ovchynnikov, Maksym, Sokolenko, Anastasia
• Format: Article
• Language: English
• Subjects: Atoms & subatomic particles; Beyond Standard Model; Bosons; Bremsstrahlung; Channels; Classical and Quantum Gravitation; Coherent scattering; Elementary Particles; Higgs bosons; Higgs Physics; High energy physics; Inelastic scattering; Light; Mesons; Phenomenology; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Theoretical Physics; Relativity Theory; Scalars; String Theory
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP11(2019)162

A bstract We review and revise the phenomenology of the scalar portal — a new scalar particle with the mass in GeV range that mixes with the Higgs boson. In particular, we consider production channels B → SK 1 (1270) and B → S K 0 ∗ 700 and show that their contribution is significant. We extend the previous analysis by comparing the production of scalars from decays of mesons, of the Higgs bosons and direct production via proton bremsstrahlung, deep inelastic scattering and coherent scattering on nuclei. Relative efficiency of the production channels depends on the energy of the beam and we consider the energies of DUNE, SHiP and LHC-based experiments. We present our results in the form directly suitable for calculations of experimental sensitivities.