Title of article :
Electroweak baryogenesis and new TeV fermions Original Research Article
Author/Authors :
M. Carena، نويسنده , , A. Megevand، نويسنده , , Roderick M. Quiros، نويسنده , , C.E.M. Wagner، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
33
From page :
319
To page :
351
Abstract :
New fermions, strongly coupled to the standard model Higgs boson, provide a well motivated extension of the standard model (SM). In this work we show that, once new physics at heavier scales is added to stabilize the Higgs potential, such an extension of the SM can strengthen the first-order electroweak phase transition and make the electroweak baryogenesis mechanism feasible. We propose a SM extension with TeV Higgsinos, Winos and Binos that satisfy the following properties: (a) The electroweak phase transition is strong enough to avoid sphaleron erasure in the broken phase for values of the Higgs mass image; (b) It provides large CP-violating currents that lead to the observed baryon asymmetry of the Universe for natural values of the CP-violating phase; (c) It also provides a natural dark matter candidate that can reproduce the observed dark matter density; (d) It is consistent with electroweak precision measurements; (e) It may arise from a softly broken supersymmetric theory with an extra (asymptotically free) gauge sector; (f) It may be tested by electron electric dipole moment experiments in the near future.
Journal title :
Nuclear Physics B
Serial Year :
2005
Journal title :
Nuclear Physics B
Record number :
874555
Link To Document :
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