Gluon Fragmentation into Heavy Quarkonium

Details Gluon Fragmentation into Heavy Quarkonium Gluon Fragmentation into Heavy Quarkonium

1993-03-02

arxiv.org/abs/hep-ph/9303205v1

Phys.Rev.Lett. 71 (1993) 1673-1676

Physics

High Energy Physics

High Energy Physics - Phenomenology

LateX 11 pages (3 figures available upon request). NUHEP-TH-92-23

Scientific paper

10.1103/PhysRevLett.71.1673

The dominant production mechanism for heavy quark-antiquark bound states in very high energy processes is fragmentation, the splitting of a high energy parton into a quarkonium state and other partons. We show that the fragmentation functions $D(z,\mu)$ describing these processes can be calculated using perturbative QCD. We calculate the fragmentation functions for a gluon to split into S-wave quarkonium states to leading order in the QCD coupling constant. The leading logarithms of $\mu/m_Q$, where $\mu$ is the factorization scale and $m_Q$ is the heavy quark mass, are summed up using Altarelli-Parisi evolution equations.

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