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Inclusive Hadroproduction of P-Wave Heavy Quarkonia in Potential Nonrelativistic QCD
Nora Brambilla1,2, Hee Sok Chung1, Antonio Vairo1
1Physik-Department, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany.
Abstract:
We compute the color-singlet and color-octet nonrelativistic QCD (NRQCD) long-distance matrix elements for inclusive production of P-wave quarkonia in the framework of potential NRQCD. In this way, the color-octet NRQCD long-distance matrix element can be determined without relying on measured cross section data, which has not been possible so far. We obtain inclusive cross sections of χ_{cJ} and χ_{bJ} at the LHC, which are in good agreement with data. In principle, the formalism developed in this Letter can be applied to all inclusive production processes of heavy quarkonia.
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