2024/11/14 by M. Czakon, Czakon, Michał, Terry Generet +5 · 3 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2411.09684
openalex publication_date 2024/11/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
We report on a calculation of open heavy-flavor production at hadron colliders which extends to next-to-next-to-leading order (NNLO) accuracy the classic NLO-accurate formalism developed almost 30 years ago under the acronym FONLL. The approach retains the exact heavy-flavor mass dependence at low transverse momentum, pT, and resums collinear logarithms through next-to-next-to-leading log (NNLL) at high pT. Provided are predictions for B-hadrons as well as B-decay products like J/Ψ and muons. The main features of the NNLO+NNLL results are reduced scale dependence and moderate NNLO correction, consistent with perturbative convergence in a wide range of kinematic scales from few GeV up to asymptotically large values of pT. The new calculation significantly improves the agreement with data for B-hadrons and muons. We uncover an intriguing discrepancy in J/Ψ final states which may point to a lower value of the B→ J/Ψ decay rate.