PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T07 Top and Electroweak Physics
Precision Top Mass Measurement Using Energy Correlators
A. Pathak*, J. Holguin, I. Moult, M. Procura, R. Schoefbeck and D. Schwarz
Full text: pdf
Pre-published on: February 08, 2024
Published on: March 21, 2024
Precision top mass measurements at hadron colliders have been notoriously difficult. The fundamental challenge in the current approaches lies in achieving simultaneously high top mass sensitivity and good theoretical control. Inspired by the use of standard candles in cosmology, we overcome this problem by showing that a single energy correlator-based observable that reflects the characteristic angular scales associated with both the $W$-boson and top quark can be constructed. This gives direct access to the dimensionless quantity $m_{t}/m_{W}$, from which $m_{t}$ can be extracted in a well-defined short-distance mass scheme as a function of the well-known $m_{W}$. A Monte-Carlo-based study is performed to demonstrate the properties of our observable and the statistical feasibility of its extraction from the Run 2 and 3 and High-Luminosity LHC data sets. The resulting $m_t$ has remarkably small uncertainties from hadronization effects and is insensitive to the underlying event and parton distribution functions.
Our proposed observable provides a road map for a rich program to achieve a top mass determination at the LHC with record precision.
DOI: https://doi.org/10.22323/1.449.0312
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