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Probing Heavy Quarkonium Production Mechnism: polarization
Hua-Sheng Shao
The necessicity of the color-octet mechanism in describing heavy quarkonium production is a longstanding puzzle. Compared to the yields of heavy quarkonium, its polarizations shoul…
Automated next-to-leading order predictions for new physics at the LHC: the case of colored scalar pair production
Céline Degrande, Benjamin Fuks, Valentin Hirschi +2
We present for the first time the full automation of collider predictions matched with parton showers at the next-to-leading accuracy in QCD within non-trivial extensions of the St…
production at LHC and indications on the understanding of production
Hao Han, Yan-Qing Ma, Ce Meng +2
We present a complete evaluation for the prompt production at the LHC at next-to-leading order in in nonrelativistic QCD. By assuming heavy quark spin symmetry, the rec…
Yields and polarizations of prompt $\jpsi$ and $\psits$ production in hadronic collisions
H. S. Shao, H. Han, Y. Q. Ma +3
We give predictions of $\jpsi$ and $\psits$ yields and polarizations in prompt production at hadron colliders based on non-relativistic QCD factorization formula. We calculate shor…
J/psi-Pair Production at Large Momenta: Indications for Double-Parton Scatterings and Large alpha_s^5 Contributions
Jean-Philippe Lansberg, Hua-Sheng Shao
We demonstrate that the recent studies of J/psi-pair production by CMS at the LHC and by D0 at the Tevatron reveal the presence of different production mechanisms in different kine…
and production at hadron colliders in nonrelativistic QCD
H. Han, Y. Q. Ma, C. Meng +3
and (n=1,2,3) production at the LHC is studied at next-to-leading order in in nonrelativistic QCD. Feeddown contributions from higher and states a…
Weak corrections to Higgs hadroproduction in association with a top-quark pair
S. Frixione, V. Hirschi, D. Pagani +2
We present the calculation of the next-to-leading contribution of order to the production of a Standard Model Higgs boson in association with a top-quark pair at hadron…
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
J. Alwall, R. Frederix, S. Frixione +7
We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulat…
Initial state radiation effects in inclusive production at B factories
Hua-Sheng Shao
Based on Monte Carlo techniques, we analyze the initial state radiation (ISR) effects in prompt $\jpsi$ inclusive production at B factories. ISR enhances cross section $σ(e^-e^+\to…
Polarizations of and in prompt production at the LHC
Hua-Sheng Shao, Yan-Qing Ma, Kai Wang +1
Prompt production at hadron colliders may provide a unique test for the color-octet mechanism in nonrelativistic QCD. We present an analysis for the polarization observables…