Color-Octet Scalars of N=2 Supersymmetry at the LHC

Abstract

The color gauge hyper-multiplet in N=2 supersymmetry consists of the usual N=1 gauge vector/gaugino super-multiplet, joined with a novel gaugino/scalar super-multiplet. Large cross sections are predicted for the production of pairs of the color-octet scalars $\sigma$ [sgluons] at the LHC: $gg,q\bar{q}\to \sigma {\sigma }^{\ast }$. Single $\sigma$ production is possible at one-loop level, but the $gg\to \sigma$ amplitude vanishes in the limit of degenerate $L$ and $R$ squarks. When kinematically allowed, $\sigma$ decays predominantly into two gluinos, whose cascade decays give rise to a burst of eight or more jets together with four LSP's as signature for $\sigma$ pair events at the LHC. $\sigma$ can also decay into a squark-antisquark pair at tree level. At one-loop level $\sigma$ decays into gluons or a $t\bar{t}$ pair are predicted, generating exciting resonance signatures in the final states. The corresponding partial widths are very roughly comparable to that for three body final states mediated by one virtual squark at tree level.

LaTeX, 12 pages, 5 embedded figures. Added a couple of references; version to appear in Phys. Lett. B

References in corpus (7)

• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• Color-octet scalars at the LHC
• Color Octet Scalar Production at the LHC
• Testing the Majorana Nature of Gluinos and Neutralinos
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• The study of sq_L sq_L production at LHC in the l^\pm l^\pm channel and sensitivity to other models
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