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PreprintCC BY 4.0arXiv

Double-real corrections to e+e-→ qq̅ with partial fractioned scalar radiators and identified particle kinematics mappings

  • John M. Campbell
  • Stefan Höche
  • Max Knobbe
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Abstract

We present a new approach to local infrared subtraction for next-to-next-to-leading order QCD calculations in e+e-→ qq̅. Overlapping singularities in the multipole radiation pattern are disentangled by partial fractioning, and the kinematics mapping corresponds to iterated next-to-leading order identified particle kinematics. We verify that the double-real remainder is rendered finite in the single and double unresolved limits and investigate the numerical convergence of the Monte-Carlo integral. We compute the phase-space integrals of the scalar counterterms in the back-to-back configuration, both analytically and with the help of numerical techniques based on sector decomposition.

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Cite

BibTeXRIS
BibTeX
@misc{campbell2026doublereal,
  title = {{Double-real corrections to $e^+e^-\to q\barq$ with partial fractioned scalar radiators and identified particle kinematics mappings}},
  author = {John M. Campbell and Stefan Höche and Max Knobbe},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.26247},
  eprint = {2606.26247},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.26247},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Double-real corrections to e^+e^-→ qq̅ with partial fractioned scalar radiators and identified particle kinematics mappings
AU  - John M. Campbell
AU  - Stefan Höche
AU  - Max Knobbe
PY  - 2026
DA  - 2026/10/16
PB  - arXiv
DO  - 10.48550/arxiv.2606.26247
UR  - https://arxiv.org/abs/2606.26247
AB  - We present a new approach to local infrared subtraction for next-to-next-to-leading order QCD calculations in e^+e^-→ qq̅. Overlapping singularities in the multipole radiation pattern are disentangled by partial fractioning, and the kinematics mapping corresponds to iterated next-to-leading order identified particle kinematics. We verify that the double-real remainder is rendered finite in the single and double unresolved limits and investigate the numerical convergence of the Monte-Carlo integral. We compute the phase-space integrals of the scalar counterterms in the back-to-back configuration, both analytically and with the help of numerical techniques based on sector decomposition.
ER  -