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Double prompt $J/\psi$ hadroproduction in the parton Reggeization approach with high-energy resummation
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abstract
We study double prompt $J/\psi$ hadroproduction within the nonrelativistic-QCD factorization formalism adopting the parton Reggeization approach to treat initial-state radiation in a gauge invariant and infrared-safe way. We present first predictions for the cross section distributions in the transverse momenta of the subleading $J/\psi$ meson and the $J/\psi$ pair. Already at leading order in $\alpha_s$, these predictions as well as those for the total cross section and its distributions in the invariant mass $m_{\psi\psi}$ and the rapidity separation $|Y|$ of the $J/\psi$ pair nicely agree with recent ATLAS and CMS measurements, except for the large-$m_{\psi\psi}$ and large-$|Y|$ regions, where the predictions substantially undershoot the data. In the latter regions, BFKL resummation is shown to enhance the cross sections by up to a factor of two and so to improve the description of the data.
Forward citations
Cited by 4 Pith papers
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New evidence for the rapidity evolution in Mueller-Navelet dijet production: BFKL, Sudakov, and RG-invariance
A new matching of NLO BFKL resummation with high-energy factorization and Sudakov effects describes Mueller-Navelet dijet data and attributes the large-rapidity decorrelation to BFKL dynamics.
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Next-to-leading-order QCD corrections to double prompt $J/{\psi}$ hadroproduction
Color-singlet NRQCD at next-to-leading order reproduces most LHCb double-J/psi data but undershoots CMS and ATLAS by factors of 10 to 29.
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