Double Prompt J/ψ Hadroproduction in the Parton Reggeization Approach with High-Energy Resummation.

We study double prompt J/ψ 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/ψ meson and the J/ψ pair. Already at leading order in α_{s}, these predictions as well as those for the total cross section and its distributions in the invariant mass m_{ψψ} and the rapidity separation |Y| of the J/ψ pair nicely agree with recent ATLAS and CMS Collaboration measurements, except for the large-m_{ψψ} and large-|Y| regions, where the predictions substantially undershoot the data.

From zeolite nets to sp(3) carbon allotropes: a topology-based multiscale theoretical study.

We present a comprehensive computational study of sp(3)-carbon allotropes based on the topologies proposed for zeolites. From ≈600,000 zeolite nets we identified six new allotropes, lying by at most 0.12 eV per atom above diamond.