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A consistent π’ͺ(v2) NRQCD description of decays and high-PT prompt production of charmonia

  • Valerio Bertone
  • Jean-Philippe Lansberg
  • Kate Lynch
  • Tanjona R Rabemananjara
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Abstract

We present a global determination of the six long-distance matrix elements (LDMEs) within non-relativistic QCD (NRQCD) appearing in the production of prompt J/ψ up to π’ͺ(v2) using high-PT LHC data for direct and feed-down contributions from Ο‡c and ψ(2S). Using a leading-power fragmentation framework at NLO+NLL, we fit $ψ(2S)/J/ψ$ yield ratios from ATLAS and CMS and ψ(2S) CMS polarization data at √s = 13 TeV, injecting one decay width per charmonium. The fit LDMEs provide excellent predictions of the CMS and ATLAS cross-section data up to PT=360 GeV for the J/ψ, as well as the J/ψ polarization data from CMS. The obtained excellent agreement with production and decay data demonstrates that π’ͺ(v2) NRQCD is sufficient to describe J/ψ, ψ(2S), and Ο‡c hadroproduction at large PT.

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Cite

BibTeXRIS
BibTeX
@misc{bertone2026consistent,
  title = {{A consistent $\mathcalO(v^2)$ NRQCD description of decays and high-$P_T$ prompt production of charmonia}},
  author = {Valerio Bertone and Jean-Philippe Lansberg and Kate Lynch and Tanjona R Rabemananjara},
  howpublished = {HAL},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.02096},
  eprint = {2610.02096},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05781944v1},
}
RIS
TY  - UNPB
TI  - A consistent π’ͺ(v^2) NRQCD description of decays and high-P_T prompt production of charmonia
AU  - Valerio Bertone
AU  - Jean-Philippe Lansberg
AU  - Kate Lynch
AU  - Tanjona R Rabemananjara
PY  - 2026
DA  - 2026/10/01
PB  - HAL
DO  - 10.48550/arxiv.2610.02096
UR  - https://hal.science/hal-05781944v1
AB  - We present a global determination of the six long-distance matrix elements (LDMEs) within non-relativistic QCD (NRQCD) appearing in the production of prompt J/ψ up to π’ͺ(v^2) using high-P_T LHC data for direct and feed-down contributions from Ο‡_c and ψ(2S). Using a leading-power fragmentation framework at NLO+NLL, we fit $ψ(2S)/J/ψ$ yield ratios from ATLAS and CMS and ψ(2S) CMS polarization data at √s = 13 TeV, injecting one decay width per charmonium. The fit LDMEs provide excellent predictions of the CMS and ATLAS cross-section data up to P_T=360 GeV for the J/ψ, as well as the J/ψ polarization data from CMS. The obtained excellent agreement with production and decay data demonstrates that π’ͺ(v^2) NRQCD is sufficient to describe J/ψ, ψ(2S), and Ο‡_c hadroproduction at large P_T.
ER  -