QCD corrections to stoponium production at hadron colliders

Details QCD corrections to stoponium production at hadron colliders QCD corrections to stoponium production at hadron colliders

2009-12-24

arxiv.org/abs/0912.4813v1

Phys.Rev.D81:055006,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages

Scientific paper

10.1103/PhysRevD.81.055006

If the lighter top squark has no kinematically allowed two-body decays that conserve flavor, then it will live long enough to form hadronic bound states. The observation of the diphoton decays of stoponium could then provide a uniquely precise measurement of the top squark mass. In this paper, we calculate the cross section for the production of stoponium in a hadron collider at next-to-leading order (NLO) in QCD. We present numerical results for the cross section for production of stoponium at the LHC and study the dependence on beam energy, stoponium mass, and the renormalization and factorization scale. The cross-section is substantially increased by the NLO corrections, counteracting a corresponding decrease found earlier in the NLO diphoton branching ratio.

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