Speaker
Dr
Debottam Das
(Laboratoire de Physique Theorique d'Orsay (LPT, Orsay))
Description
In the Next-to-Minimal Supersymmetric Standard Model, a bino-like LSP
can be as light as a few GeV and satisfy WMAP constraints on the dark
matter relic density in the presence of a light CP-odd Higgs scalar. We
study upper bounds on direct detection cross sections for such a light
LSP in the mass range 2--20~GeV in the NMSSM, respecting all constraints
from B-physics and LEP. The OPAL constraints on $e^+ e^- \to \chi^0_1
\chi^0_i$ ($i > 1$) play an important r\^ole and are discussed in some
detail. The resulting upper bounds on the spin independent and spin
dependent nucleon cross sections are $\sim 10^{-42}$~cm$^{-2}$ and
$\sim 4\cdot 10^{-40}$~cm$^{-2}$, respectively
Primary authors
Dr
Debottam Das
(Laboratoire de Physique Theorique d'Orsay (LPT, Orsay))
Prof.
Ulrich Ellwanger
(Laboratoire de Physique Theorique d'Orsay (LPT, Orsay))
