On the mechanisms of heavy-quarkonium hadroproduction

By J. Lansberg. 2008

184 citations recorded by the source corpus.

We discuss the various mechanisms potentially at work in hadroproduction of heavy quarkonia in the light of computations of higher-order QCD corrections both in the colour-singlet (CS) and colour-octet (CO) channels and the inclusion of the contribution arising from the s-channel cut in the CS channel. We also discuss new observables meant to better discriminate between these different mechanisms.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b57a35473b68a0dd18e1a9549299e3b6d63c1064

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In Nuclear and High Energy Physics

1. J. Stachel
2. R. Rapp
3. J. Lansberg
4. Alexander Rothkopf
5. A. Andronic
6. H. Hees
7. H. Satz
8. M. He

Citations in the corpus

• Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, unknown): “Calculations assuming an initial QQ colour-singlet (CS) state [568–570] show good agreement [571–576] with the experimental data [565, 577–583] for production cross-sections and the shapes of the transverse momentum spectra.”
• Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions (2015, methodology): “9 a Prompt J/ψ yield as measured by LHCb [172] at √ s = 7 TeV compared to different theory predictions referred to as “prompt NLO NRQCD”[173], “Direct NLO CS”[57,58], “Direct NNLO CS” [61,62] and “Prompt NLO CEM” [174].”
• Measurement of J/psi production in pp collisions at root s=7 TeV (2011, background): “• top, right: direct production as calculated from a NNLO? colour-singlet model (CSM, filled red uncertainty band) [11, 33].”
• Observation of J/ψ-pair production in pp collisions at (2011, unknown): “ the CO mechanism was introduced [5]. The corresponding matrix elements were determined from the large-p T data as the CO cross-section falls more slowly than the CS one. However, recent calculations [6, 7, 8, 9] close the gap between the CS predictions and the experimental data [10] reducing the ne”
• New observables in inclusive production of quarkonia (2019, methodology): “It is now widely accepted –and understood– [61, 95] that the NLO (α(4)S ) and NNLO (α 5 S ) corrections to the production of spin triplet vector quarkonia in the CSM are significantly larger than the LO contributions at mid and large PT and that they should systematically be accounted for in any stu”
• Production of J/ψ and $ \varUpsilon $ mesons in pp collisions at $ \sqrt{s}=8 $ TeV (2013, unknown): “In contrast, the CSM at NLO underestimates the cross-section by an order of magnitude.”