Dark radiation confronting LHC in Z′ models

2012/10/23 by A. Solaguren-Beascoa, Ana Solaguren-Beascoa, M. C. González-García +1 · 27 citations
Physics and Astronomy · #Boson #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gauge (firearms) #Gauge boson #Gauge theory #Large Hadron Collider #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum mechanics #Radiation #astro-ph.CO #hep-ph

paper · pdf · doi:10.1016/j.physletb.2012.12.065

published in Physics Letters B 719(1-3), 121-125 (Elsevier BV) · 11 pages, 4 figures

arxiv created 2012/10/23 · openalex publication_date 2013/01/03 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Recent cosmological data favour additional relativistic degrees of freedom beyond the three active neutrinos and photons, often referred to as "dark radiation". Extensions of the SM involving TeV-scale Z' gauge bosons generically contain superweakly interacting light right-handed neutrinos which can constitute this dark radiation. In this letter we confront the requirement on the parameters of the E6 Z' models to account for the present evidence of dark radiation with the already existing constraints from searches for new neutral gauge bosons at LHC7.

Citations

• An analysis of constraints on relativistic species from primordial nucleosynthesis and the cosmic microwave background
• A robust upper limit on Neff from BBN, circa 2011
• Search for narrow resonances in dilepton mass spectra in pp collisions at s=7<mml:mspace width="0.25em"/>TeV
• Phenomenology with massive neutrinos
• Neutrino Cosmology after WMAP 7-Year Data and LHC FirstZ′Bounds

Cited by

• Impact of Beyond the Standard Model physics in the detection of the Cosmic Neutrino Background