Collider signatures of goldstini in gauge mediation
Artikel i vetenskaplig tidskrift, 2012

We investigate the collider signatures of the multiple goldstini scenario in the framework of gauge mediation. This class of models is characterized by a visible sector (e.g. the MSSM or any extension) coupled by gauge interactions to more than one SUSY breaking sector. The spectrum consists of a light gravitino LSP, behaving as a goldstino, and a number of neutral fermions (the pseudo-goldstini) with a mass between that of the LSP and that of the lightest particle of the observable sector (LOSP). We consider the two situations where the LOSP is either a gaugino-like neutralino or a stau and we assume only one pseudo-goldstino of a mass of O(100) GeV. The coupling of the LOSP to the pseudo-goldstino can be enhanced with respect to those of the gravitino giving rise to characteristic signatures. We show that the decay modes of the LOSP into a SM particle and a pseudo-goldstino can be significant. For both LOSP scenarios we analyze (pseudo)-goldstini production at colliders. Compared to standard gauge mediation the final state spectrum is softer and more structured.

Goldstinos

Supersymmetry

LHC

Författare

Riccardo Argurio

Université libre de Bruxelles (ULB)

International Solvay Institute for Physics and Chemistry

K. De Causmaecker

International Solvay Institute for Physics and Chemistry

Vrije Universiteit Brüssel (VUB)

Gabriele Ferretti

Chalmers, Teknisk fysik, Matematisk fysik

A. Mariotti

Vrije Universiteit Brüssel (VUB)

International Solvay Institute for Physics and Chemistry

K. Mawatari

Vrije Universiteit Brüssel (VUB)

International Solvay Institute for Physics and Chemistry

Yoshitaro Takaesu

High Energy Accelerator Research Organization

Journal of High Energy Physics

1126-6708 (ISSN) 1029-8479 (eISSN)

6

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1007/JHEP06(2012)096