Mesino - Antimesino Oscillations

TL;DR

The phenomenology of supersymmetric theories with low scale supersymmetry breaking and a squark as the lightest standard model superpartner are investigated, and neutral mesino-antimesino oscillations are investigated to give a sensitive probe of up-type sflavor violation.

Abstract

The phenomenological implications of supersymmetric theories with low scale supersymmetry breaking and a squark as the lightest standard model superpartner are investigated. Such squarks hadronize with light quarks, forming sbaryons and mesinos before decaying. Production of these supersymmetric bound states at a high energy collider can lead to displaced jets with large negative impact parameter. Neutral mesino - antimesino oscillations are not forbidden by any symmetry and can occur at observable rates with distinctive signatures. Stop mesino - antimesino oscillations would give a sensitive probe of up-type sflavor violation in the squark sector, and can provide a discovery channel for supersymmetry through events with a same-sign top-top topology.

Figures (1)

• Figure 1: Mesino oscillations arise (a) from tree-level gaugino exchange and (b) from one-loop charged current--chargino box diagrams. Arrows indicate the flow of fermion number and crosses represent fermion number violating gaugino mass insertions. (S)flavor violation may be isolated in the gaugino and gauge interactions. Diagrams for other neutralinos and charginos and those related by crossing are not shown.