$\tau \to \ell +$ invisible through invisible-savvy collider variables

  title={\$\tau \to \ell +\$ invisible through invisible-savvy collider variables},
  author={Diego Guadagnoli and Chan Beom Park and Francesco Tenchini},
New particles φ in the MeV-GeV range produced at colliders and escaping detection can be searched for at operating b− and τ−factories such as Belle II. A typical search topology involves pair-produced τs (or mesons), one of which decaying to visibles plus the φ, and the other providing a tag. One crucial impediment of these searches is the limited ability to reconstruct the parents’ separate boosts. This is the case in the ‘typical’ topology where both decay branches include escaping particles… Expand

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