Production of two J/ mesons in proton-proton collisions at the LHC
Abstract
We discuss inclusive production of pairs of J/ quarkonia. Both leading-order single parton (box) contribution and double-parton contributions are included. In addition we discuss a contribution of higher-order two-gluon exchange and a feed down from double c production. The second two contributions are important for large rapidity distance between the two J/ mesons and for relatively large cut-offs on quarkonia transverse momenta. A relation to current experiments is discussed.
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