Diphoton decays of stoponium at the Large Hadron Collider

Understand

If the lighter top squark has no kinematically allowed two-body decays that conserve flavor, then it will form hadronic bound states.

• This is required in models that are motivated by the supersymmetric little hierarchy problem and obtain the correct thermal relic abundance of dark matter by top-squark-mediated neutralino annihilations, or by top-squark-neutralino co-annihilations.
• It is also found in models that can accommodate electroweak-scale baryogenesis within minimal supersymmetry.
• I study the prospects for detecting scalar stoponium from its diphoton decay mode at the Large Hadron Collider, updating and correcting previous work.