Séminaires et colloques
Top-quark mass measurement from diphoton mass spectrum
by
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Europe/Paris
LPSC Theory Group
LPSC Theory Group
Description
In this talk, I explain our recent study on the ttbar bound-state effects in the diphoton mass spectrum at hadron colliders. Based on the one-loop calculation and non-relativistic QCD, we formulate the gg\to\gamma\gamma amplitude with ttbar bound-state effects near their mass threshold, and predict a characteristic structure in the diphoton mass spectrum. Thanks to the simple and clean nature of the observable, its experimental measurement can be a superior method to determine the top-quark mass at hadron colliders.
Based on arxiv:1607.00990