Dark radiation confronting LHC in Z' models

A. Solaguren-Beascoa; M. C. Gonzalez-Garcia

doi:10.1016/j.physletb.2012.12.065

Dark radiation confronting LHC in Z^' models

A. Solaguren-Beascoa
, M. C. Gonzalez-Garcia

Institute for Theoretical Physics

University of Barcelona

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

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.

Original language	English
Pages (from-to)	121-125
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	719
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physletb.2012.12.065
State	Published - Feb 12 2013

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10.1016/j.physletb.2012.12.065

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N2 - 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.

AB - 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.

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DO - 10.1016/j.physletb.2012.12.065

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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ER -

Dark radiation confronting LHC in Z^' models

Abstract

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