Supersymmetric origin of matter

C. Balázs, M. Carena, A. Menon, D. E. Morrissey, and C. E. M. Wagner
Phys. Rev. D 71, 075002 – Published 5 April 2005

Abstract

The minimal supersymmetric extension of the standard model (MSSM) can provide the correct neutralino relic abundance and baryon number asymmetry of the universe. Both may be efficiently generated in the presence of CP violating phases, light charginos and neutralinos, and a light top squark. Because of the coannihilation of the neutralino with the light stop, we find a large region of parameter space in which the neutralino relic density is consistent with WMAP and SDSS data. We perform a detailed study of the additional constraints induced when CP violating phases, consistent with the ones required for baryogenesis, are included. We explore the possible tests of this scenario from present and future electron electric dipole moment (EDM) measurements, direct neutralino detection experiments, collider searches and the bsγ decay rate. We find that the EDM constraints are quite severe and that electron EDM experiments, together with stop searches at the Tevatron and Higgs searches at the LHC, will provide a definite test of our scenario of electroweak baryogenesis in the next few years.

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  • Received 6 January 2005

DOI:https://doi.org/10.1103/PhysRevD.71.075002

©2005 American Physical Society

Authors & Affiliations

C. Balázs1, M. Carena2, A. Menon1,3, D. E. Morrissey1,3, and C. E. M. Wagner1,3

  • 1HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, USA
  • 2Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USA
  • 3Enrico Fermi Institute, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, USA

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Issue

Vol. 71, Iss. 7 — 1 April 2005

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