Toponium hadroproduction at next-to-next-to-leading order in NRQCD
Abstract
We present the first next-to-next-to-leading-order (NNLO) predictions for inclusive color-singlet toponium hadroproduction within NRQCD in the zero-width limit for the top quark. The central new result is the NNLO QCD correction to the short-distance coefficient for pseudoscalar toponium production. The predictions include electroweak and relativistic corrections, additional production channels, and perturbatively evaluated bound-state matrix elements. At the Large Hadron Collider proton-proton center-of-mass energy of 13 TeV, we obtain a cross section of 4.87+0.63−0.65 pb, with scale and parametric uncertainties combined. The NNLO corrections reduce the renormalization- and factorization-scale uncertainties by approximately a factor of four relative to NLO, to the few-percent level. The dominant remaining uncertainty arises from the Coulomb-scale dependence of the bound-state matrix elements.
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BibTeX
@misc{klein2026toponium,
title = {{Toponium hadroproduction at next-to-next-to-leading order in NRQCD}},
author = {Sven Yannick Klein and Fabio Maltoni and Hua-Sheng Shao and Lukas Simon and Guoxing Wang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.03782},
eprint = {2611.03782},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.03782},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Toponium hadroproduction at next-to-next-to-leading order in NRQCD
AU - Sven Yannick Klein
AU - Fabio Maltoni
AU - Hua-Sheng Shao
AU - Lukas Simon
AU - Guoxing Wang
PY - 2026
DA - 2026/11/02
PB - arXiv
DO - 10.48550/arxiv.2611.03782
UR - https://arxiv.org/abs/2611.03782
AB - We present the first next-to-next-to-leading-order (NNLO) predictions for inclusive color-singlet toponium hadroproduction within NRQCD in the zero-width limit for the top quark. The central new result is the NNLO QCD correction to the short-distance coefficient for pseudoscalar toponium production. The predictions include electroweak and relativistic corrections, additional production channels, and perturbatively evaluated bound-state matrix elements. At the Large Hadron Collider proton-proton center-of-mass energy of 13 TeV, we obtain a cross section of 4.87^+0.63_−0.65 pb, with scale and parametric uncertainties combined. The NNLO corrections reduce the renormalization- and factorization-scale uncertainties by approximately a factor of four relative to NLO, to the few-percent level. The dominant remaining uncertainty arises from the Coulomb-scale dependence of the bound-state matrix elements.
ER -