Invariant-mass distribution of top-quark pairs and top-quark mass determination

Understand

We investigate the invariant-mass distribution of top-quark pairs near the $2m_t$ threshold, which has strong impact on the determination of the top-quark mass $m_t$.

• We show that higher-order non-relativistic corrections lead to large contributions which are not included in the state-of-the-art theoretical predictions.
• We derive a factorization formula to resum such corrections to all orders in the strong-coupling, and calculate necessary ingredients to perform the resummation at next-to-leading power.
• We combine the resummation with fixed-order results and present phenomenologically relevant numeric results.