Asymmetric dark matter and baryogenesis from SU(2)ℓ

Asymmetric dark matter and baryogenesis from SU(2)ℓ We propose a theory in which the Standard Model gauge symmetry is extended by a new SU(2)ℓ group acting nontrivially on the lepton sector which is spontaneously broken at the TeV scale. Under this SU(2)ℓ the ordinary leptons form doublets along with new lepton partner fields. This construction naturally contains a dark matter candidate, the partner of the right-handed neutrino, stabilized by a residual global U(1)χ symmetry. We show that one can explain baryogenesis through an asymmetric dark matter scenario, in which generation of related asymmetries in the dark matter and baryon sectors is driven by the SU(2)ℓ instantons during a first order phase transition in the early Universe. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Asymmetric dark matter and baryogenesis from SU(2)ℓ

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Asymmetric dark matter and baryogenesis from SU(2)ℓ

Abstract

We propose a theory in which the Standard Model gauge symmetry is extended by a new SU(2)ℓ group acting nontrivially on the lepton sector which is spontaneously broken at the TeV scale. Under this SU(2)ℓ the ordinary leptons form doublets along with new lepton partner fields. This construction naturally contains a dark matter candidate, the partner of the right-handed neutrino, stabilized by a residual global U(1)χ symmetry. We show that one can explain baryogenesis through an asymmetric dark matter scenario, in which generation of related asymmetries in the dark matter and baryon sectors is driven by the SU(2)ℓ instantons during a first order phase transition in the early Universe.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.96.035001
Publisher site
See Article on Publisher Site

Abstract

We propose a theory in which the Standard Model gauge symmetry is extended by a new SU(2)ℓ group acting nontrivially on the lepton sector which is spontaneously broken at the TeV scale. Under this SU(2)ℓ the ordinary leptons form doublets along with new lepton partner fields. This construction naturally contains a dark matter candidate, the partner of the right-handed neutrino, stabilized by a residual global U(1)χ symmetry. We show that one can explain baryogenesis through an asymmetric dark matter scenario, in which generation of related asymmetries in the dark matter and baryon sectors is driven by the SU(2)ℓ instantons during a first order phase transition in the early Universe.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Aug 1, 2017

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