Inclusive J/ψ and ψ(2S) production from b-hadron decay in pp̄ and pp collisions

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2013

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We study the inclusive production of J/ψ and ψ(2S) mesons originating from the decays of bottom-flavored hadrons produced in pp̄ collisions at the Fermilab Tevatron and in pp collisions at the CERN LHC. We work at next-to-leading order in the general-mass variable-flavor-number scheme implemented with nonperturbative fragmentation functions fitted to e +e- data of inclusive b-hadron production exploiting their universality. The three-momentum distributions of the charmonia used were extracted from B-decay data in the framework of nonrelativistic-QCD factorization. Comparing the theoretical predictions thus obtained with transverse-momentum distributions measured by the CDF II, ALICE, ATLAS, CMS, and LHCb collaborations, we find excellent overall agreement as for both absolute normalization and line shape, which provides a nontrivial test of the general-mass variable-flavor-number scheme over wide ranges of center-of-mass energy, transverse momentum, and rapidity. © 2013 American Physical Society.

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