info:eu-repo/semantics/article
Long-lived colored scalars at the LHC
Fecha
2016-03Registro en:
de la Puente, Alejandro; Szynkman, Alejandro Andrés; Long-lived colored scalars at the LHC; Springer; European Physical Journal C: Particles and Fields; 76; 3; 3-2016; 124(1-15)
1434-6044
1434-6052
CONICET Digital
CONICET
Autor
de la Puente, Alejandro
Szynkman, Alejandro Andrés
Resumen
We study the collider signatures of a long-lived massive colored scalar transforming trivially under the weak interaction and decaying within the inner sections of a detector such as ATLAS or CMS. In our study, we assume that the colored scalar couples at tree-level to a top quark and a stable fermion, possibly arising from a dark sector or from supersymmetric extensions of the Standard Model. After implementing the latest experimental searches for long-lived colored scalars, we observe a region of parameter space consistent with a colored electroweak-singlet scalar with mass between (Formula presented.) –350 GeV and a lifetime between 0.1–1 (Formula presented.) together, with a nearly degenerate dark fermion that may be probed at the (Formula presented.) TeV LHC. We show that a search strategy using a combination of cuts on missing transverse energy and impact parameters can exclude regions of parameter space not accessed by prompt searches. We show that a region of parameter space within our simplified model may naturally arise from the light-stop window regime of supersymmetric extensions of the Standard Model, where a light mostly right-handed stop has a mass slightly larger than the lightest neutralino and decays through a four-body process.