Leptogenesis from composite singlets

We argue that dual singlets accommodate the thermal leptogenesis in the context of metastable supersymmetry breaking. This framework suggests that the reheating temperature is as low as <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi mathvariant="script">O</a:mi><a:mo stretchy="false">(</a:mo><a:msup><a:mn>10</a:mn><a:mn>4</a:mn></a:msup><a:mo stretchy="false">)</a:mo><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>GeV</a:mi></a:math>, and besides the neutrino masses, solely induced from the dual fermions, are present at <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mi mathvariant="script">O</f:mi><f:mo stretchy="false">(</f:mo><f:mn>0.1</f:mn><f:mo stretchy="false">)</f:mo><f:mtext> </f:mtext><f:mtext> </f:mtext><f:mi>eV</f:mi></f:math>. We also expect that the unstable gravitino, though long-lived, may cause a clear signal of the neutrino flux at <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mi mathvariant="script">O</k:mi><k:mo stretchy="false">(</k:mo><k:mn>10</k:mn><k:mo stretchy="false">)</k:mo><k:mtext> </k:mtext><k:mtext> </k:mtext><k:mi>MeV</k:mi></k:math>. Published by the American Physical Society 2024