Sterile neutrino portal dark matter from semiproduction
Sterile neutrino portal dark matter from semiproduction
In this paper, we study the feeble sterile neutrino portal dark matter under the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>Z</a:mi><a:mn>3</a:mn></a:msub></a:math> symmetry. The dark sector consists of one fermion singlet <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>χ</c:mi></c:math> and one scalar singlet <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>χ</e:mi></e:math>, which transform as <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mi>χ</g:mi><g:mo stretchy="false">→</g:mo><g:msup><g:mi>e</g:mi><g:mrow><g:mi>i</g:mi><g:mn>2</g:mn><g:mi>π</g:mi><g:mo>/</g:mo><g:mn>3</g:mn></g:mrow></g:msup><g:mi>χ</g:mi><g:mo>,</g:mo><g:mi>ϕ</g:mi><g:mo stretchy="false">→</g:mo><g:msup><g:mi>e</g:mi><g:mrow><g:mi>i</g:mi><g:mn>2</g:mn><g:mi>π</g:mi><g:mo>/</g:mo><g:mn>3</g:mn></g:mrow></g:msup><g:mi>ϕ</g:mi></g:math> under the <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:msub><k:mi>Z</k:mi><k:mn>3</k:mn></k:msub></k:math> symmetry. …