The Supersymmetric Flavour and CP Problems From a Cosmological Perspective

Details The Supersymmetric Flavour and CP Problems From a Cosmological Perspective The Supersymmetric Flavour and CP Problems From a Cosmological Perspective

1998-04-22

arxiv.org/abs/hep-ph/9804365v2

Phys.Lett.B440:287-295,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures, LaTeX; version to be published in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(98)01104-6

The supersymmetric flavour and CP problems can be avoided if the first two generations of sfermions are heavier than a few TeV and approximately degenerate in mass. However using flavour and CP-violating constraints on the third sfermion generation, together with the decoupling of the first two generations, can dramatically affect cosmological predictions such as the relic abundance of stable particles. In particular, we show that if the lightest supersymmetric particle is essentially bino-like then requiring that all flavour changing neutral current and CP-violating processes are adequately suppressed, imposes severe limits on the bino mass, where typically m_bino>(200-300) GeV. This leads to difficulties for models implementing the scenario of heavy sfermion masses.

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