Spectrum-doubled heavy vector bosons at the LHC

• Published in: The journal of high energy physics Vol. 2016; no. 1; pp. 1 - 25
• Main Authors: Appelquist, Thomas, Bai, Yang, Ingoldby, James, Piai, Maurizio
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 19.01.2016; Springer Berlin
• Subjects: Approximation; Beyond Standard Model; Bosons; Classical and Quantum Gravitation; Couplings; Cross sections; Elementary Particles; Higgs physics; Mathematical analysis; Mathematical models; Physics; Physics and Astronomy; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Symmetry; Technicolor and Composite Models; Vectors (mathematics); Beyond Standard Model; Technicolor and Composite Models; Higgs Physics
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP01(2016)109

A bstract We study a simple effective field theory incorporating six heavy vector bosons together with the standard-model field content. The new particles preserve custodial symmetry as well as an approximate left-right parity symmetry. The enhanced symmetry of the model allows it to satisfy precision electroweak constraints and bounds from Higgs physics in a regime where all the couplings are perturbative and where the amount of fine-tuning is comparable to that in the standard model itself. We find that the model could explain the recently observed excesses in di-boson processes at invariant mass close to 2 TeV from LHC Run 1 for a range of allowed parameter space. The masses of all the particles differ by no more than roughly 10%. In a portion of the allowed parameter space only one of the new particles has a production cross section large enough to be detectable with the energy and luminosity of Run 1, both via its decay to W Z and to W h , while the others have suppressed production rates. The model can be tested at the higher-energy and higher-luminosity run of the LHC even for an overall scale of the new particles higher than 3 TeV.