# SUSY10

Aug 23 – 28, 2010
Bonn
Europe/Berlin timezone

## Light dark matter in the NMSSM: upper bounds on direct detection cross sections

Aug 27, 2010, 2:34 PM
15m
Hörsaal I (Bonn)

Nussallee 12

### 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))

 Slides