PreprintCC BY 4.0arXiv
Top Spin and CP from Equivariant Transformers
Abstract
Measurements of spin correlations and CP are an exciting and challenging part of the precision-LHC program. We first show how L-GATr-slim, as a Lorentz-equivariant transformer, significantly boosts the spin analyzing power for hadronic top quarks. We then show how adding a pseudoscalar channel to its architecture allows us to learn and interpret optimal observables and their CP properties. We demonstrate this for WBF-Higgs production at parton level and top pair production including detector effects.
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BibTeX
@misc{bahl2026spin,
title = {{Top Spin and CP from Equivariant Transformers}},
author = {Henning Bahl and Marco Menen and Antoine Petitjean and Tilman Plehn},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.05463},
eprint = {2611.05463},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.05463},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Top Spin and CP from Equivariant Transformers
AU - Henning Bahl
AU - Marco Menen
AU - Antoine Petitjean
AU - Tilman Plehn
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.05463
UR - https://arxiv.org/abs/2611.05463
AB - Measurements of spin correlations and CP are an exciting and challenging part of the precision-LHC program. We first show how L-GATr-slim, as a Lorentz-equivariant transformer, significantly boosts the spin analyzing power for hadronic top quarks. We then show how adding a pseudoscalar channel to its architecture allows us to learn and interpret optimal observables and their CP properties. We demonstrate this for WBF-Higgs production at parton level and top pair production including detector effects.
ER -